/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 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:17:01,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:17:01,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:17:01,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:17:01,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:17:01,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:17:01,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:17:01,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:17:01,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:17:01,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:17:01,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:17:01,178 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:17:01,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:17:01,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:17:01,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:17:01,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:17:01,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:17:01,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:17:01,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:17:01,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:17:01,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:17:01,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:17:01,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:17:01,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:17:01,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:17:01,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:17:01,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:17:01,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:17:01,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:17:01,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:17:01,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:17:01,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:17:01,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:17:01,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:17:01,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:17:01,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:17:01,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:17:01,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:17:01,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:17:01,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:17:01,467 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:17:01,468 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:17:01,468 INFO L432 ainManager$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 [2021-08-21 12:17:01,469 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl' [2021-08-21 12:17:01,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:17:01,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:17:01,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:17:01,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:17:01,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:17:01,510 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,518 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:17:01,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:17:01,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:17:01,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:17:01,532 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,532 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,541 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,541 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,544 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,546 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,547 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 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:17:01,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:17:01,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:17:01,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:17:01,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:17:01" (1/1) ... [2021-08-21 12:17:01,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:17:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:01,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:17:01,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:17:01,613 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:17:01,614 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:17:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:17:01,614 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:17:01,614 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:17:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:17:01,614 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:17:01,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:17:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:17:01,615 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:17:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:17:01,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:17:01,616 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:17:02,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:17:02,033 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 12:17:02,034 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:17:02 BoogieIcfgContainer [2021-08-21 12:17:02,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:17:02,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:17:02,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:17:02,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:17:02,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:17:01" (1/2) ... [2021-08-21 12:17:02,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad26833 and model type name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:17:02, skipping insertion in model container [2021-08-21 12:17:02,038 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 21.08 12:17:02" (2/2) ... [2021-08-21 12:17:02,039 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-subst.wvr.bpl [2021-08-21 12:17:02,042 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:17:02,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:17:02,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:17:02,042 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:17:02,076 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:17:02,101 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:17:02,105 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:17:02,105 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:17:02,111 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-08-21 12:17:02,125 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:02,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:02,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:02,132 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1091082122, now seen corresponding path program 1 times [2021-08-21 12:17:02,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:02,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14244403] [2021-08-21 12:17:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:02,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:02,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:02,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14244403] [2021-08-21 12:17:02,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14244403] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:02,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:02,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:02,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126285102] [2021-08-21 12:17:02,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:02,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:02,406 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) [2021-08-21 12:17:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:02,810 INFO L93 Difference]: Finished difference Result 399 states and 1111 transitions. [2021-08-21 12:17:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:17:02,812 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 [2021-08-21 12:17:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:02,828 INFO L225 Difference]: With dead ends: 399 [2021-08-21 12:17:02,828 INFO L226 Difference]: Without dead ends: 357 [2021-08-21 12:17:02,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-21 12:17:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 147. [2021-08-21 12:17:02,883 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) [2021-08-21 12:17:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 418 transitions. [2021-08-21 12:17:02,905 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 418 transitions. Word has length 17 [2021-08-21 12:17:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:02,915 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 418 transitions. [2021-08-21 12:17:02,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 418 transitions. [2021-08-21 12:17:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:02,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:02,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:02,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:17:02,917 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1716858762, now seen corresponding path program 2 times [2021-08-21 12:17:02,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:02,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018809757] [2021-08-21 12:17:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:02,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:03,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:03,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018809757] [2021-08-21 12:17:03,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018809757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:03,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:03,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:03,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291909810] [2021-08-21 12:17:03,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:03,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:03,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:03,085 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) [2021-08-21 12:17:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:03,313 INFO L93 Difference]: Finished difference Result 375 states and 1007 transitions. [2021-08-21 12:17:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:03,317 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 [2021-08-21 12:17:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:03,318 INFO L225 Difference]: With dead ends: 375 [2021-08-21 12:17:03,319 INFO L226 Difference]: Without dead ends: 353 [2021-08-21 12:17:03,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-21 12:17:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2021-08-21 12:17:03,326 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) [2021-08-21 12:17:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 487 transitions. [2021-08-21 12:17:03,326 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 487 transitions. Word has length 17 [2021-08-21 12:17:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:03,327 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 487 transitions. [2021-08-21 12:17:03,327 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) [2021-08-21 12:17:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 487 transitions. [2021-08-21 12:17:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:03,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:03,328 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:03,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:17:03,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash 431937774, now seen corresponding path program 3 times [2021-08-21 12:17:03,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:03,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006165040] [2021-08-21 12:17:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:03,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:03,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:03,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006165040] [2021-08-21 12:17:03,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006165040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:03,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:03,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:03,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663440699] [2021-08-21 12:17:03,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:03,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:03,517 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) [2021-08-21 12:17:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:03,771 INFO L93 Difference]: Finished difference Result 390 states and 1060 transitions. [2021-08-21 12:17:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:03,771 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 [2021-08-21 12:17:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:03,773 INFO L225 Difference]: With dead ends: 390 [2021-08-21 12:17:03,773 INFO L226 Difference]: Without dead ends: 375 [2021-08-21 12:17:03,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-21 12:17:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 177. [2021-08-21 12:17:03,780 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) [2021-08-21 12:17:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-08-21 12:17:03,780 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-08-21 12:17:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:03,781 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-08-21 12:17:03,781 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) [2021-08-21 12:17:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-08-21 12:17:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:03,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:03,782 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:03,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:17:03,782 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1885470014, now seen corresponding path program 4 times [2021-08-21 12:17:03,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:03,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773493423] [2021-08-21 12:17:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:03,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:03,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:03,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773493423] [2021-08-21 12:17:03,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773493423] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:03,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:03,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:03,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813533558] [2021-08-21 12:17:03,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:03,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:03,905 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) [2021-08-21 12:17:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:04,140 INFO L93 Difference]: Finished difference Result 390 states and 1047 transitions. [2021-08-21 12:17:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:04,141 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 [2021-08-21 12:17:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:04,143 INFO L225 Difference]: With dead ends: 390 [2021-08-21 12:17:04,143 INFO L226 Difference]: Without dead ends: 369 [2021-08-21 12:17:04,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-21 12:17:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-08-21 12:17:04,149 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) [2021-08-21 12:17:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 509 transitions. [2021-08-21 12:17:04,149 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 509 transitions. Word has length 17 [2021-08-21 12:17:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:04,150 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 509 transitions. [2021-08-21 12:17:04,150 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) [2021-08-21 12:17:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 509 transitions. [2021-08-21 12:17:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:04,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:04,151 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:04,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:17:04,151 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2058717706, now seen corresponding path program 5 times [2021-08-21 12:17:04,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:04,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252797051] [2021-08-21 12:17:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:04,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:04,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:04,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252797051] [2021-08-21 12:17:04,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252797051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:04,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:04,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:04,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577093811] [2021-08-21 12:17:04,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:04,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:04,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:04,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:04,269 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) [2021-08-21 12:17:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:04,442 INFO L93 Difference]: Finished difference Result 360 states and 984 transitions. [2021-08-21 12:17:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:04,442 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 [2021-08-21 12:17:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:04,444 INFO L225 Difference]: With dead ends: 360 [2021-08-21 12:17:04,444 INFO L226 Difference]: Without dead ends: 333 [2021-08-21 12:17:04,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-08-21 12:17:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 177. [2021-08-21 12:17:04,448 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) [2021-08-21 12:17:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 506 transitions. [2021-08-21 12:17:04,449 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 506 transitions. Word has length 17 [2021-08-21 12:17:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:04,449 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 506 transitions. [2021-08-21 12:17:04,449 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) [2021-08-21 12:17:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 506 transitions. [2021-08-21 12:17:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:04,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:04,450 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:04,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:17:04,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash -126988386, now seen corresponding path program 6 times [2021-08-21 12:17:04,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:04,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143390090] [2021-08-21 12:17:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:04,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:04,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:04,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143390090] [2021-08-21 12:17:04,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143390090] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:04,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:04,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:04,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325970064] [2021-08-21 12:17:04,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:04,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:04,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:04,603 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) [2021-08-21 12:17:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:04,839 INFO L93 Difference]: Finished difference Result 473 states and 1280 transitions. [2021-08-21 12:17:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:04,839 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 [2021-08-21 12:17:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:04,841 INFO L225 Difference]: With dead ends: 473 [2021-08-21 12:17:04,841 INFO L226 Difference]: Without dead ends: 451 [2021-08-21 12:17:04,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-21 12:17:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 179. [2021-08-21 12:17:04,846 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) [2021-08-21 12:17:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 516 transitions. [2021-08-21 12:17:04,847 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 516 transitions. Word has length 17 [2021-08-21 12:17:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:04,854 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 516 transitions. [2021-08-21 12:17:04,855 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) [2021-08-21 12:17:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 516 transitions. [2021-08-21 12:17:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:04,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:04,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:04,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:17:04,856 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2128553198, now seen corresponding path program 7 times [2021-08-21 12:17:04,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:04,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600859844] [2021-08-21 12:17:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:04,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:05,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:05,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600859844] [2021-08-21 12:17:05,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600859844] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:05,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:05,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:05,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404033587] [2021-08-21 12:17:05,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:05,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:05,010 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) [2021-08-21 12:17:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:05,278 INFO L93 Difference]: Finished difference Result 457 states and 1242 transitions. [2021-08-21 12:17:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:05,278 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 [2021-08-21 12:17:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:05,280 INFO L225 Difference]: With dead ends: 457 [2021-08-21 12:17:05,280 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:17:05,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:17:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 182. [2021-08-21 12:17:05,286 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) [2021-08-21 12:17:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 531 transitions. [2021-08-21 12:17:05,286 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 531 transitions. Word has length 17 [2021-08-21 12:17:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:05,287 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 531 transitions. [2021-08-21 12:17:05,287 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) [2021-08-21 12:17:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 531 transitions. [2021-08-21 12:17:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:05,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:05,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:05,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:17:05,288 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1387308582, now seen corresponding path program 8 times [2021-08-21 12:17:05,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:05,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186847406] [2021-08-21 12:17:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:05,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:05,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:05,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186847406] [2021-08-21 12:17:05,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186847406] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:05,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:05,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:05,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17032188] [2021-08-21 12:17:05,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:05,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:05,433 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) [2021-08-21 12:17:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:05,715 INFO L93 Difference]: Finished difference Result 423 states and 1167 transitions. [2021-08-21 12:17:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:05,716 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 [2021-08-21 12:17:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:05,718 INFO L225 Difference]: With dead ends: 423 [2021-08-21 12:17:05,718 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 12:17:05,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 12:17:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 188. [2021-08-21 12:17:05,722 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) [2021-08-21 12:17:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 546 transitions. [2021-08-21 12:17:05,723 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 546 transitions. Word has length 17 [2021-08-21 12:17:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:05,723 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 546 transitions. [2021-08-21 12:17:05,723 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) [2021-08-21 12:17:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 546 transitions. [2021-08-21 12:17:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:05,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:05,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:05,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:17:05,724 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:05,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1634250142, now seen corresponding path program 9 times [2021-08-21 12:17:05,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:05,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690002239] [2021-08-21 12:17:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:05,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:05,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:05,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690002239] [2021-08-21 12:17:05,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690002239] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:05,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:05,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:05,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309748644] [2021-08-21 12:17:05,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:05,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:05,843 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) [2021-08-21 12:17:06,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:06,098 INFO L93 Difference]: Finished difference Result 479 states and 1324 transitions. [2021-08-21 12:17:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:06,098 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 [2021-08-21 12:17:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:06,100 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:17:06,101 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 12:17:06,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 12:17:06,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 195. [2021-08-21 12:17:06,105 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) [2021-08-21 12:17:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-08-21 12:17:06,106 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 17 [2021-08-21 12:17:06,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:06,106 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-08-21 12:17:06,107 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) [2021-08-21 12:17:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-08-21 12:17:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:06,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:06,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:06,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 12:17:06,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1207184914, now seen corresponding path program 10 times [2021-08-21 12:17:06,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:06,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952190534] [2021-08-21 12:17:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:06,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:06,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:06,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952190534] [2021-08-21 12:17:06,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952190534] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:06,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:06,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:06,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974935711] [2021-08-21 12:17:06,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:06,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:06,268 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) [2021-08-21 12:17:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:06,496 INFO L93 Difference]: Finished difference Result 479 states and 1311 transitions. [2021-08-21 12:17:06,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:06,497 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 [2021-08-21 12:17:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:06,498 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:17:06,499 INFO L226 Difference]: Without dead ends: 458 [2021-08-21 12:17:06,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-21 12:17:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 192. [2021-08-21 12:17:06,512 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) [2021-08-21 12:17:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-08-21 12:17:06,512 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 17 [2021-08-21 12:17:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:06,512 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-08-21 12:17:06,513 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) [2021-08-21 12:17:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-08-21 12:17:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:06,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:06,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:06,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 12:17:06,513 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1033937222, now seen corresponding path program 11 times [2021-08-21 12:17:06,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:06,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319605203] [2021-08-21 12:17:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:06,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:06,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:06,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319605203] [2021-08-21 12:17:06,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319605203] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:06,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:06,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:06,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760244593] [2021-08-21 12:17:06,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:06,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:06,620 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) [2021-08-21 12:17:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:06,778 INFO L93 Difference]: Finished difference Result 484 states and 1319 transitions. [2021-08-21 12:17:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:06,778 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 [2021-08-21 12:17:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:06,780 INFO L225 Difference]: With dead ends: 484 [2021-08-21 12:17:06,780 INFO L226 Difference]: Without dead ends: 457 [2021-08-21 12:17:06,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-21 12:17:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 189. [2021-08-21 12:17:06,785 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) [2021-08-21 12:17:06,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-08-21 12:17:06,785 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-08-21 12:17:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:06,786 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-08-21 12:17:06,786 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) [2021-08-21 12:17:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-08-21 12:17:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:06,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:06,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:06,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 12:17:06,787 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash 438610294, now seen corresponding path program 12 times [2021-08-21 12:17:06,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:06,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865369332] [2021-08-21 12:17:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:06,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:06,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:06,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865369332] [2021-08-21 12:17:06,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865369332] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:06,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:06,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:06,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383171704] [2021-08-21 12:17:06,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:06,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:06,943 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) [2021-08-21 12:17:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:07,155 INFO L93 Difference]: Finished difference Result 466 states and 1294 transitions. [2021-08-21 12:17:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:07,155 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 [2021-08-21 12:17:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:07,157 INFO L225 Difference]: With dead ends: 466 [2021-08-21 12:17:07,157 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 12:17:07,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 12:17:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 195. [2021-08-21 12:17:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.979381443298969) internal successors, (578), 194 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-08-21 12:17:07,163 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-08-21 12:17:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:07,163 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-08-21 12:17:07,163 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) [2021-08-21 12:17:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-08-21 12:17:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:07,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:07,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:07,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 12:17:07,164 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1217715810, now seen corresponding path program 13 times [2021-08-21 12:17:07,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:07,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145428297] [2021-08-21 12:17:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:07,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:07,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:07,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145428297] [2021-08-21 12:17:07,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145428297] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:07,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:07,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:07,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861701028] [2021-08-21 12:17:07,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:07,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:07,268 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) [2021-08-21 12:17:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:07,465 INFO L93 Difference]: Finished difference Result 442 states and 1237 transitions. [2021-08-21 12:17:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:07,466 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 [2021-08-21 12:17:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:07,467 INFO L225 Difference]: With dead ends: 442 [2021-08-21 12:17:07,467 INFO L226 Difference]: Without dead ends: 420 [2021-08-21 12:17:07,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-21 12:17:07,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 192. [2021-08-21 12:17:07,472 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) [2021-08-21 12:17:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 563 transitions. [2021-08-21 12:17:07,473 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 563 transitions. Word has length 17 [2021-08-21 12:17:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:07,473 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 563 transitions. [2021-08-21 12:17:07,473 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) [2021-08-21 12:17:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 563 transitions. [2021-08-21 12:17:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:07,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:07,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:07,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 12:17:07,474 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:07,474 INFO L82 PathProgramCache]: Analyzing trace with hash 799711430, now seen corresponding path program 14 times [2021-08-21 12:17:07,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:07,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113176366] [2021-08-21 12:17:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:07,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:07,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:07,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113176366] [2021-08-21 12:17:07,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113176366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:07,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:07,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:07,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4307271] [2021-08-21 12:17:07,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:07,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:07,574 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) [2021-08-21 12:17:07,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:07,750 INFO L93 Difference]: Finished difference Result 426 states and 1176 transitions. [2021-08-21 12:17:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:07,751 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 [2021-08-21 12:17:07,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:07,752 INFO L225 Difference]: With dead ends: 426 [2021-08-21 12:17:07,752 INFO L226 Difference]: Without dead ends: 399 [2021-08-21 12:17:07,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-08-21 12:17:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 194. [2021-08-21 12:17:07,757 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) [2021-08-21 12:17:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 568 transitions. [2021-08-21 12:17:07,757 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 568 transitions. Word has length 17 [2021-08-21 12:17:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:07,757 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 568 transitions. [2021-08-21 12:17:07,757 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) [2021-08-21 12:17:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 568 transitions. [2021-08-21 12:17:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:07,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:07,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:07,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 12:17:07,758 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1112471848, now seen corresponding path program 15 times [2021-08-21 12:17:07,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:07,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116342457] [2021-08-21 12:17:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:07,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:07,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:07,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116342457] [2021-08-21 12:17:07,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116342457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:07,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:07,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:07,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490171272] [2021-08-21 12:17:07,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:07,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:07,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:07,888 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) [2021-08-21 12:17:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:08,161 INFO L93 Difference]: Finished difference Result 390 states and 1077 transitions. [2021-08-21 12:17:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:08,161 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 [2021-08-21 12:17:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:08,162 INFO L225 Difference]: With dead ends: 390 [2021-08-21 12:17:08,162 INFO L226 Difference]: Without dead ends: 368 [2021-08-21 12:17:08,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-21 12:17:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 196. [2021-08-21 12:17:08,166 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) [2021-08-21 12:17:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 578 transitions. [2021-08-21 12:17:08,167 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 578 transitions. Word has length 17 [2021-08-21 12:17:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:08,167 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 578 transitions. [2021-08-21 12:17:08,167 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) [2021-08-21 12:17:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 578 transitions. [2021-08-21 12:17:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:08,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:08,168 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:08,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 12:17:08,168 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1143069736, now seen corresponding path program 16 times [2021-08-21 12:17:08,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:08,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067796591] [2021-08-21 12:17:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:08,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:08,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:08,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067796591] [2021-08-21 12:17:08,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067796591] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:08,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:08,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:08,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701837900] [2021-08-21 12:17:08,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:08,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:08,350 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) [2021-08-21 12:17:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:08,659 INFO L93 Difference]: Finished difference Result 441 states and 1207 transitions. [2021-08-21 12:17:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:08,660 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 [2021-08-21 12:17:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:08,661 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:17:08,661 INFO L226 Difference]: Without dead ends: 419 [2021-08-21 12:17:08,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-21 12:17:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 199. [2021-08-21 12:17:08,666 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) [2021-08-21 12:17:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 593 transitions. [2021-08-21 12:17:08,666 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 593 transitions. Word has length 17 [2021-08-21 12:17:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:08,667 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 593 transitions. [2021-08-21 12:17:08,667 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) [2021-08-21 12:17:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 593 transitions. [2021-08-21 12:17:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:08,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:08,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:08,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 12:17:08,668 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1922175252, now seen corresponding path program 17 times [2021-08-21 12:17:08,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:08,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673074520] [2021-08-21 12:17:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:08,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:08,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:08,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673074520] [2021-08-21 12:17:08,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673074520] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:08,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:08,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:08,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449510234] [2021-08-21 12:17:08,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:08,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:08,792 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) [2021-08-21 12:17:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:09,090 INFO L93 Difference]: Finished difference Result 407 states and 1132 transitions. [2021-08-21 12:17:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:09,091 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 [2021-08-21 12:17:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:09,092 INFO L225 Difference]: With dead ends: 407 [2021-08-21 12:17:09,092 INFO L226 Difference]: Without dead ends: 385 [2021-08-21 12:17:09,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-08-21 12:17:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 194. [2021-08-21 12:17:09,097 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) [2021-08-21 12:17:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 568 transitions. [2021-08-21 12:17:09,097 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 568 transitions. Word has length 17 [2021-08-21 12:17:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:09,097 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 568 transitions. [2021-08-21 12:17:09,097 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) [2021-08-21 12:17:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 568 transitions. [2021-08-21 12:17:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:09,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:09,098 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:09,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 12:17:09,098 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2058151224, now seen corresponding path program 18 times [2021-08-21 12:17:09,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:09,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218781075] [2021-08-21 12:17:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:09,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:09,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:09,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218781075] [2021-08-21 12:17:09,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218781075] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:09,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:09,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:09,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926168750] [2021-08-21 12:17:09,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:09,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:09,246 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) [2021-08-21 12:17:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:09,449 INFO L93 Difference]: Finished difference Result 404 states and 1136 transitions. [2021-08-21 12:17:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:09,449 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 [2021-08-21 12:17:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:09,450 INFO L225 Difference]: With dead ends: 404 [2021-08-21 12:17:09,450 INFO L226 Difference]: Without dead ends: 389 [2021-08-21 12:17:09,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-08-21 12:17:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 203. [2021-08-21 12:17:09,455 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) [2021-08-21 12:17:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 609 transitions. [2021-08-21 12:17:09,455 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 609 transitions. Word has length 17 [2021-08-21 12:17:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:09,455 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 609 transitions. [2021-08-21 12:17:09,455 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) [2021-08-21 12:17:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 609 transitions. [2021-08-21 12:17:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:09,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:09,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:09,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 12:17:09,456 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1457710556, now seen corresponding path program 19 times [2021-08-21 12:17:09,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:09,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144108904] [2021-08-21 12:17:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:09,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:09,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:09,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144108904] [2021-08-21 12:17:09,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144108904] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:09,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:09,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:09,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130182761] [2021-08-21 12:17:09,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:09,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:09,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:09,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:09,583 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) [2021-08-21 12:17:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:09,835 INFO L93 Difference]: Finished difference Result 417 states and 1166 transitions. [2021-08-21 12:17:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:09,835 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 [2021-08-21 12:17:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:09,837 INFO L225 Difference]: With dead ends: 417 [2021-08-21 12:17:09,837 INFO L226 Difference]: Without dead ends: 402 [2021-08-21 12:17:09,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-21 12:17:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 203. [2021-08-21 12:17:09,841 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) [2021-08-21 12:17:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 609 transitions. [2021-08-21 12:17:09,842 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 609 transitions. Word has length 17 [2021-08-21 12:17:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:09,842 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 609 transitions. [2021-08-21 12:17:09,842 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) [2021-08-21 12:17:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 609 transitions. [2021-08-21 12:17:09,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:09,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:09,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:09,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 12:17:09,843 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:09,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1508559320, now seen corresponding path program 20 times [2021-08-21 12:17:09,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:09,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898439198] [2021-08-21 12:17:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:09,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:09,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:09,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898439198] [2021-08-21 12:17:09,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898439198] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:09,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:09,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:09,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090289912] [2021-08-21 12:17:09,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:09,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:09,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:09,943 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) [2021-08-21 12:17:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:10,157 INFO L93 Difference]: Finished difference Result 372 states and 1062 transitions. [2021-08-21 12:17:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:10,158 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 [2021-08-21 12:17:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:10,159 INFO L225 Difference]: With dead ends: 372 [2021-08-21 12:17:10,159 INFO L226 Difference]: Without dead ends: 357 [2021-08-21 12:17:10,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-21 12:17:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 209. [2021-08-21 12:17:10,163 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) [2021-08-21 12:17:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 624 transitions. [2021-08-21 12:17:10,164 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 624 transitions. Word has length 17 [2021-08-21 12:17:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:10,164 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 624 transitions. [2021-08-21 12:17:10,164 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) [2021-08-21 12:17:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 624 transitions. [2021-08-21 12:17:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:10,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:10,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:10,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 12:17:10,165 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash -199855792, now seen corresponding path program 21 times [2021-08-21 12:17:10,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:10,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634565766] [2021-08-21 12:17:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:10,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:10,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:10,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634565766] [2021-08-21 12:17:10,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634565766] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:10,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:10,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:10,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132067785] [2021-08-21 12:17:10,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:10,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:10,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:10,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:10,282 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) [2021-08-21 12:17:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:10,476 INFO L93 Difference]: Finished difference Result 422 states and 1196 transitions. [2021-08-21 12:17:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:10,476 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 [2021-08-21 12:17:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:10,478 INFO L225 Difference]: With dead ends: 422 [2021-08-21 12:17:10,478 INFO L226 Difference]: Without dead ends: 407 [2021-08-21 12:17:10,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-21 12:17:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 217. [2021-08-21 12:17:10,482 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) [2021-08-21 12:17:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 658 transitions. [2021-08-21 12:17:10,483 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 658 transitions. Word has length 17 [2021-08-21 12:17:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:10,483 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 658 transitions. [2021-08-21 12:17:10,483 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) [2021-08-21 12:17:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 658 transitions. [2021-08-21 12:17:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:10,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:10,483 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:10,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 12:17:10,484 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1253676448, now seen corresponding path program 22 times [2021-08-21 12:17:10,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:10,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327323645] [2021-08-21 12:17:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:10,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:10,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:10,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327323645] [2021-08-21 12:17:10,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327323645] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:10,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:10,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:10,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901148063] [2021-08-21 12:17:10,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:10,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:10,584 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) [2021-08-21 12:17:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:10,780 INFO L93 Difference]: Finished difference Result 422 states and 1183 transitions. [2021-08-21 12:17:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:10,780 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 [2021-08-21 12:17:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:10,782 INFO L225 Difference]: With dead ends: 422 [2021-08-21 12:17:10,782 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 12:17:10,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 12:17:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 214. [2021-08-21 12:17:10,786 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) [2021-08-21 12:17:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 644 transitions. [2021-08-21 12:17:10,787 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 644 transitions. Word has length 17 [2021-08-21 12:17:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:10,787 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 644 transitions. [2021-08-21 12:17:10,787 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) [2021-08-21 12:17:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 644 transitions. [2021-08-21 12:17:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:10,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:10,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:10,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 12:17:10,790 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1426924140, now seen corresponding path program 23 times [2021-08-21 12:17:10,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:10,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192689139] [2021-08-21 12:17:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:10,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:10,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:10,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192689139] [2021-08-21 12:17:10,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192689139] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:10,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:10,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:10,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120588599] [2021-08-21 12:17:10,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:10,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:10,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:10,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:10,893 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) [2021-08-21 12:17:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:11,094 INFO L93 Difference]: Finished difference Result 427 states and 1191 transitions. [2021-08-21 12:17:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:11,094 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 [2021-08-21 12:17:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:11,095 INFO L225 Difference]: With dead ends: 427 [2021-08-21 12:17:11,096 INFO L226 Difference]: Without dead ends: 400 [2021-08-21 12:17:11,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-21 12:17:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 211. [2021-08-21 12:17:11,100 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) [2021-08-21 12:17:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 633 transitions. [2021-08-21 12:17:11,100 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 633 transitions. Word has length 17 [2021-08-21 12:17:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:11,100 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 633 transitions. [2021-08-21 12:17:11,100 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) [2021-08-21 12:17:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 633 transitions. [2021-08-21 12:17:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:11,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:11,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:11,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-21 12:17:11,101 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:11,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1395495640, now seen corresponding path program 24 times [2021-08-21 12:17:11,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:11,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125725221] [2021-08-21 12:17:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:11,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:11,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:11,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125725221] [2021-08-21 12:17:11,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125725221] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:11,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:11,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:11,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619652560] [2021-08-21 12:17:11,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:11,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:11,204 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) [2021-08-21 12:17:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:11,407 INFO L93 Difference]: Finished difference Result 468 states and 1314 transitions. [2021-08-21 12:17:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:11,408 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 [2021-08-21 12:17:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:11,409 INFO L225 Difference]: With dead ends: 468 [2021-08-21 12:17:11,409 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:17:11,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:17:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 218. [2021-08-21 12:17:11,414 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) [2021-08-21 12:17:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 660 transitions. [2021-08-21 12:17:11,414 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 660 transitions. Word has length 17 [2021-08-21 12:17:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:11,414 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 660 transitions. [2021-08-21 12:17:11,415 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) [2021-08-21 12:17:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 660 transitions. [2021-08-21 12:17:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:11,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:11,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:11,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-21 12:17:11,415 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash -616390124, now seen corresponding path program 25 times [2021-08-21 12:17:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:11,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967728742] [2021-08-21 12:17:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:11,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:11,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:11,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967728742] [2021-08-21 12:17:11,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967728742] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:11,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:11,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:11,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802481302] [2021-08-21 12:17:11,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:11,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:11,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:11,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:11,544 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) [2021-08-21 12:17:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:11,731 INFO L93 Difference]: Finished difference Result 444 states and 1260 transitions. [2021-08-21 12:17:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:11,731 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 [2021-08-21 12:17:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:11,733 INFO L225 Difference]: With dead ends: 444 [2021-08-21 12:17:11,733 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 12:17:11,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 12:17:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 213. [2021-08-21 12:17:11,737 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) [2021-08-21 12:17:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-21 12:17:11,737 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-21 12:17:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:11,737 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-21 12:17:11,737 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) [2021-08-21 12:17:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-21 12:17:11,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:11,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:11,738 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:11,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-21 12:17:11,738 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1034394504, now seen corresponding path program 26 times [2021-08-21 12:17:11,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:11,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560250994] [2021-08-21 12:17:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:11,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:11,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:11,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560250994] [2021-08-21 12:17:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560250994] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:11,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:11,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428082668] [2021-08-21 12:17:11,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:11,865 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) [2021-08-21 12:17:12,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:12,063 INFO L93 Difference]: Finished difference Result 470 states and 1291 transitions. [2021-08-21 12:17:12,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:12,063 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 [2021-08-21 12:17:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:12,065 INFO L225 Difference]: With dead ends: 470 [2021-08-21 12:17:12,065 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:17:12,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:12,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:17:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 213. [2021-08-21 12:17:12,069 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) [2021-08-21 12:17:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-21 12:17:12,070 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-21 12:17:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:12,070 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-21 12:17:12,070 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) [2021-08-21 12:17:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-21 12:17:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:12,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:12,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:12,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-21 12:17:12,071 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1209528752, now seen corresponding path program 27 times [2021-08-21 12:17:12,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:12,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660101335] [2021-08-21 12:17:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:12,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:12,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:12,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660101335] [2021-08-21 12:17:12,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660101335] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:12,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:12,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:12,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488975483] [2021-08-21 12:17:12,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:12,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:12,204 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) [2021-08-21 12:17:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:12,414 INFO L93 Difference]: Finished difference Result 445 states and 1295 transitions. [2021-08-21 12:17:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:12,414 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 [2021-08-21 12:17:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:12,416 INFO L225 Difference]: With dead ends: 445 [2021-08-21 12:17:12,416 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 12:17:12,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 12:17:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 219. [2021-08-21 12:17:12,420 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) [2021-08-21 12:17:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 665 transitions. [2021-08-21 12:17:12,421 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 665 transitions. Word has length 17 [2021-08-21 12:17:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:12,421 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 665 transitions. [2021-08-21 12:17:12,421 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) [2021-08-21 12:17:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 665 transitions. [2021-08-21 12:17:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:12,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:12,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:12,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-21 12:17:12,422 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:12,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1988634268, now seen corresponding path program 28 times [2021-08-21 12:17:12,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:12,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782324546] [2021-08-21 12:17:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:12,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:12,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:12,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782324546] [2021-08-21 12:17:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782324546] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:12,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:12,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:12,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174200405] [2021-08-21 12:17:12,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:12,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:12,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:12,528 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) [2021-08-21 12:17:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:12,752 INFO L93 Difference]: Finished difference Result 458 states and 1325 transitions. [2021-08-21 12:17:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:12,753 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 [2021-08-21 12:17:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:12,754 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:17:12,754 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:17:12,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:17:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 216. [2021-08-21 12:17:12,758 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) [2021-08-21 12:17:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-08-21 12:17:12,759 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 17 [2021-08-21 12:17:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:12,759 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-08-21 12:17:12,759 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) [2021-08-21 12:17:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-08-21 12:17:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:12,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:12,760 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:12,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-21 12:17:12,760 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash 659936848, now seen corresponding path program 29 times [2021-08-21 12:17:12,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:12,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082963591] [2021-08-21 12:17:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:12,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:12,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:12,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082963591] [2021-08-21 12:17:12,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082963591] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:12,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:12,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:12,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471033098] [2021-08-21 12:17:12,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:12,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:12,863 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) [2021-08-21 12:17:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:13,065 INFO L93 Difference]: Finished difference Result 409 states and 1199 transitions. [2021-08-21 12:17:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:13,065 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 [2021-08-21 12:17:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:13,066 INFO L225 Difference]: With dead ends: 409 [2021-08-21 12:17:13,066 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 12:17:13,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 12:17:13,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 213. [2021-08-21 12:17:13,070 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) [2021-08-21 12:17:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-21 12:17:13,071 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-21 12:17:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:13,071 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-21 12:17:13,071 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) [2021-08-21 12:17:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-21 12:17:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:13,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:13,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:13,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-21 12:17:13,071 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash -964284468, now seen corresponding path program 30 times [2021-08-21 12:17:13,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:13,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958596509] [2021-08-21 12:17:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:13,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:13,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:13,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958596509] [2021-08-21 12:17:13,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958596509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:13,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:13,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:13,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029581346] [2021-08-21 12:17:13,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:13,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:13,154 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) [2021-08-21 12:17:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:13,280 INFO L93 Difference]: Finished difference Result 364 states and 1025 transitions. [2021-08-21 12:17:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:13,280 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 [2021-08-21 12:17:13,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:13,281 INFO L225 Difference]: With dead ends: 364 [2021-08-21 12:17:13,281 INFO L226 Difference]: Without dead ends: 337 [2021-08-21 12:17:13,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-21 12:17:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-08-21 12:17:13,285 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) [2021-08-21 12:17:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 638 transitions. [2021-08-21 12:17:13,285 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 638 transitions. Word has length 17 [2021-08-21 12:17:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:13,285 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 638 transitions. [2021-08-21 12:17:13,285 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) [2021-08-21 12:17:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 638 transitions. [2021-08-21 12:17:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:13,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:13,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:13,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-21 12:17:13,286 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:13,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1151884991, now seen corresponding path program 1 times [2021-08-21 12:17:13,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:13,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183568818] [2021-08-21 12:17:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:13,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:13,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:13,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183568818] [2021-08-21 12:17:13,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183568818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:13,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:13,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:13,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836502141] [2021-08-21 12:17:13,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:13,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:13,355 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) [2021-08-21 12:17:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:13,467 INFO L93 Difference]: Finished difference Result 447 states and 1250 transitions. [2021-08-21 12:17:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:13,467 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 [2021-08-21 12:17:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:13,468 INFO L225 Difference]: With dead ends: 447 [2021-08-21 12:17:13,468 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 12:17:13,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 12:17:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 223. [2021-08-21 12:17:13,472 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) [2021-08-21 12:17:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 674 transitions. [2021-08-21 12:17:13,473 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 674 transitions. Word has length 18 [2021-08-21 12:17:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:13,473 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 674 transitions. [2021-08-21 12:17:13,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 674 transitions. [2021-08-21 12:17:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:13,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:13,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:13,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-21 12:17:13,474 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash -565974871, now seen corresponding path program 1 times [2021-08-21 12:17:13,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:13,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104034634] [2021-08-21 12:17:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:13,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:13,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:13,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104034634] [2021-08-21 12:17:13,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104034634] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:13,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:13,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:13,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078307543] [2021-08-21 12:17:13,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:13,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:13,551 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) [2021-08-21 12:17:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:13,668 INFO L93 Difference]: Finished difference Result 393 states and 1113 transitions. [2021-08-21 12:17:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:13,668 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 [2021-08-21 12:17:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:13,669 INFO L225 Difference]: With dead ends: 393 [2021-08-21 12:17:13,669 INFO L226 Difference]: Without dead ends: 375 [2021-08-21 12:17:13,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-21 12:17:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 223. [2021-08-21 12:17:13,673 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) [2021-08-21 12:17:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 669 transitions. [2021-08-21 12:17:13,673 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 669 transitions. Word has length 18 [2021-08-21 12:17:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:13,674 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 669 transitions. [2021-08-21 12:17:13,674 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) [2021-08-21 12:17:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 669 transitions. [2021-08-21 12:17:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:13,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:13,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-21 12:17:13,674 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash 872996999, now seen corresponding path program 2 times [2021-08-21 12:17:13,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:13,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565618138] [2021-08-21 12:17:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:13,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:13,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:13,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565618138] [2021-08-21 12:17:13,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565618138] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:13,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:13,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:13,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841917687] [2021-08-21 12:17:13,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:13,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:13,722 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) [2021-08-21 12:17:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:13,854 INFO L93 Difference]: Finished difference Result 445 states and 1236 transitions. [2021-08-21 12:17:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:13,855 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 [2021-08-21 12:17:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:13,856 INFO L225 Difference]: With dead ends: 445 [2021-08-21 12:17:13,856 INFO L226 Difference]: Without dead ends: 445 [2021-08-21 12:17:13,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-08-21 12:17:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 226. [2021-08-21 12:17:13,860 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) [2021-08-21 12:17:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 680 transitions. [2021-08-21 12:17:13,861 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 680 transitions. Word has length 18 [2021-08-21 12:17:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:13,861 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 680 transitions. [2021-08-21 12:17:13,861 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) [2021-08-21 12:17:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 680 transitions. [2021-08-21 12:17:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:13,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:13,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:13,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-21 12:17:13,862 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:13,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1755074433, now seen corresponding path program 3 times [2021-08-21 12:17:13,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:13,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279100279] [2021-08-21 12:17:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:13,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:13,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:13,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279100279] [2021-08-21 12:17:13,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279100279] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:13,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:13,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:13,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103018682] [2021-08-21 12:17:13,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:13,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:13,906 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) [2021-08-21 12:17:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:14,011 INFO L93 Difference]: Finished difference Result 402 states and 1133 transitions. [2021-08-21 12:17:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:14,012 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 [2021-08-21 12:17:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:14,013 INFO L225 Difference]: With dead ends: 402 [2021-08-21 12:17:14,013 INFO L226 Difference]: Without dead ends: 396 [2021-08-21 12:17:14,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-21 12:17:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 226. [2021-08-21 12:17:14,016 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) [2021-08-21 12:17:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 677 transitions. [2021-08-21 12:17:14,017 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 677 transitions. Word has length 18 [2021-08-21 12:17:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:14,017 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 677 transitions. [2021-08-21 12:17:14,017 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) [2021-08-21 12:17:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 677 transitions. [2021-08-21 12:17:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:14,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:14,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:14,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-21 12:17:14,018 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash 475386821, now seen corresponding path program 2 times [2021-08-21 12:17:14,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:14,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733162001] [2021-08-21 12:17:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:14,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:14,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:14,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733162001] [2021-08-21 12:17:14,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733162001] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:14,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:14,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:14,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917355971] [2021-08-21 12:17:14,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:14,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:14,067 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) [2021-08-21 12:17:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:14,172 INFO L93 Difference]: Finished difference Result 433 states and 1210 transitions. [2021-08-21 12:17:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:14,172 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 [2021-08-21 12:17:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:14,174 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:17:14,174 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 12:17:14,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 12:17:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 245. [2021-08-21 12:17:14,178 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) [2021-08-21 12:17:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 733 transitions. [2021-08-21 12:17:14,178 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 733 transitions. Word has length 18 [2021-08-21 12:17:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:14,178 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 733 transitions. [2021-08-21 12:17:14,178 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) [2021-08-21 12:17:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 733 transitions. [2021-08-21 12:17:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:14,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:14,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:14,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-21 12:17:14,179 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash 126329619, now seen corresponding path program 3 times [2021-08-21 12:17:14,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:14,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57438243] [2021-08-21 12:17:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:14,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:14,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:14,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57438243] [2021-08-21 12:17:14,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57438243] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:14,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:14,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:14,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290209119] [2021-08-21 12:17:14,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:14,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:14,230 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) [2021-08-21 12:17:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:14,338 INFO L93 Difference]: Finished difference Result 435 states and 1223 transitions. [2021-08-21 12:17:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:14,339 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 [2021-08-21 12:17:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:14,340 INFO L225 Difference]: With dead ends: 435 [2021-08-21 12:17:14,340 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:17:14,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:17:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 242. [2021-08-21 12:17:14,344 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) [2021-08-21 12:17:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 725 transitions. [2021-08-21 12:17:14,345 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 725 transitions. Word has length 18 [2021-08-21 12:17:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:14,345 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 725 transitions. [2021-08-21 12:17:14,345 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) [2021-08-21 12:17:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 725 transitions. [2021-08-21 12:17:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:14,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:14,346 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:14,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-21 12:17:14,346 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:14,346 INFO L82 PathProgramCache]: Analyzing trace with hash -408900183, now seen corresponding path program 4 times [2021-08-21 12:17:14,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:14,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534371310] [2021-08-21 12:17:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:14,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:14,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:14,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534371310] [2021-08-21 12:17:14,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534371310] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:14,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:14,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:14,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738362847] [2021-08-21 12:17:14,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:14,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:14,392 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) [2021-08-21 12:17:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:14,487 INFO L93 Difference]: Finished difference Result 450 states and 1270 transitions. [2021-08-21 12:17:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:14,487 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 [2021-08-21 12:17:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:14,489 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:17:14,489 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 12:17:14,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 12:17:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 238. [2021-08-21 12:17:14,493 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) [2021-08-21 12:17:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 709 transitions. [2021-08-21 12:17:14,493 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 709 transitions. Word has length 18 [2021-08-21 12:17:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:14,494 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 709 transitions. [2021-08-21 12:17:14,494 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) [2021-08-21 12:17:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 709 transitions. [2021-08-21 12:17:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:14,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:14,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:14,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-21 12:17:14,494 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash -710853720, now seen corresponding path program 1 times [2021-08-21 12:17:14,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:14,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704070728] [2021-08-21 12:17:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:14,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:14,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:14,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704070728] [2021-08-21 12:17:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704070728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:14,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506067505] [2021-08-21 12:17:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:14,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:14,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:14,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:14,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:17:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:14,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:14,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506067505] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:14,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:14,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-08-21 12:17:14,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992423666] [2021-08-21 12:17:14,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:14,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:14,885 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) [2021-08-21 12:17:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:14,999 INFO L93 Difference]: Finished difference Result 453 states and 1298 transitions. [2021-08-21 12:17:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:14,999 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 [2021-08-21 12:17:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:15,001 INFO L225 Difference]: With dead ends: 453 [2021-08-21 12:17:15,001 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:17:15,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:17:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 249. [2021-08-21 12:17:15,006 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) [2021-08-21 12:17:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 757 transitions. [2021-08-21 12:17:15,007 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 757 transitions. Word has length 18 [2021-08-21 12:17:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:15,007 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 757 transitions. [2021-08-21 12:17:15,007 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) [2021-08-21 12:17:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 757 transitions. [2021-08-21 12:17:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:15,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:15,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:15,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:15,220 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 [2021-08-21 12:17:15,221 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:15,221 INFO L82 PathProgramCache]: Analyzing trace with hash 742678520, now seen corresponding path program 2 times [2021-08-21 12:17:15,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:15,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285639561] [2021-08-21 12:17:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:15,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:15,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:15,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285639561] [2021-08-21 12:17:15,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285639561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:15,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404822157] [2021-08-21 12:17:15,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:15,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:15,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:15,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:17:15,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-21 12:17:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:17:15,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:17:15,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404822157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:15,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:15,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-08-21 12:17:15,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290831517] [2021-08-21 12:17:15,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:17:15,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:17:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:15,690 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) [2021-08-21 12:17:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:15,838 INFO L93 Difference]: Finished difference Result 433 states and 1252 transitions. [2021-08-21 12:17:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:17:15,839 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 [2021-08-21 12:17:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:15,841 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:17:15,841 INFO L226 Difference]: Without dead ends: 406 [2021-08-21 12:17:15,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-21 12:17:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 257. [2021-08-21 12:17:15,845 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) [2021-08-21 12:17:15,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 792 transitions. [2021-08-21 12:17:15,845 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 792 transitions. Word has length 18 [2021-08-21 12:17:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:15,845 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 792 transitions. [2021-08-21 12:17:15,845 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) [2021-08-21 12:17:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 792 transitions. [2021-08-21 12:17:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:15,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:15,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:15,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:16,062 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 [2021-08-21 12:17:16,063 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:16,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1437942816, now seen corresponding path program 3 times [2021-08-21 12:17:16,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:16,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466972849] [2021-08-21 12:17:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:16,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:16,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:16,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466972849] [2021-08-21 12:17:16,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466972849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:16,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677968487] [2021-08-21 12:17:16,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:16,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:16,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:16,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:16,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:17:16,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-08-21 12:17:16,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:17:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:17:16,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677968487] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:16,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:16,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-21 12:17:16,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389472067] [2021-08-21 12:17:16,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:17:16,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:17:16,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:16,487 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) [2021-08-21 12:17:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:16,630 INFO L93 Difference]: Finished difference Result 446 states and 1306 transitions. [2021-08-21 12:17:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:17:16,630 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 [2021-08-21 12:17:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:16,632 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:17:16,632 INFO L226 Difference]: Without dead ends: 419 [2021-08-21 12:17:16,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-21 12:17:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 268. [2021-08-21 12:17:16,636 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) [2021-08-21 12:17:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 839 transitions. [2021-08-21 12:17:16,636 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 839 transitions. Word has length 18 [2021-08-21 12:17:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:16,636 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 839 transitions. [2021-08-21 12:17:16,636 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) [2021-08-21 12:17:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 839 transitions. [2021-08-21 12:17:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:16,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:16,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:16,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:16,853 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 [2021-08-21 12:17:16,854 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1403492240, now seen corresponding path program 4 times [2021-08-21 12:17:16,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:16,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084378809] [2021-08-21 12:17:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:16,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:16,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:16,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084378809] [2021-08-21 12:17:16,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084378809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:16,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329572342] [2021-08-21 12:17:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:16,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:16,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:16,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:17:17,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:17,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:17,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:17,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:17,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329572342] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:17,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:17,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-08-21 12:17:17,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265558067] [2021-08-21 12:17:17,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:17,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:17,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:17,215 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) [2021-08-21 12:17:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:17,320 INFO L93 Difference]: Finished difference Result 504 states and 1493 transitions. [2021-08-21 12:17:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:17,321 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 [2021-08-21 12:17:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:17,323 INFO L225 Difference]: With dead ends: 504 [2021-08-21 12:17:17,323 INFO L226 Difference]: Without dead ends: 504 [2021-08-21 12:17:17,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-08-21 12:17:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 272. [2021-08-21 12:17:17,328 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) [2021-08-21 12:17:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 855 transitions. [2021-08-21 12:17:17,328 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 855 transitions. Word has length 18 [2021-08-21 12:17:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:17,328 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 855 transitions. [2021-08-21 12:17:17,328 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) [2021-08-21 12:17:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 855 transitions. [2021-08-21 12:17:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:17,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:17,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:17,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:17,544 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 [2021-08-21 12:17:17,545 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1230244548, now seen corresponding path program 5 times [2021-08-21 12:17:17,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:17,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546725631] [2021-08-21 12:17:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:17,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:17,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:17,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546725631] [2021-08-21 12:17:17,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546725631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:17,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813708227] [2021-08-21 12:17:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:17,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:17,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:17,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:17:17,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:17,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813708227] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:17,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:17,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-08-21 12:17:17,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051720143] [2021-08-21 12:17:17,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:17,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:17,848 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) [2021-08-21 12:17:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:17,943 INFO L93 Difference]: Finished difference Result 462 states and 1385 transitions. [2021-08-21 12:17:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:17,943 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 [2021-08-21 12:17:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:17,945 INFO L225 Difference]: With dead ends: 462 [2021-08-21 12:17:17,945 INFO L226 Difference]: Without dead ends: 462 [2021-08-21 12:17:17,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:17,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-21 12:17:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 274. [2021-08-21 12:17:17,949 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) [2021-08-21 12:17:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 862 transitions. [2021-08-21 12:17:17,950 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 862 transitions. Word has length 18 [2021-08-21 12:17:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:17,950 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 862 transitions. [2021-08-21 12:17:17,950 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) [2021-08-21 12:17:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 862 transitions. [2021-08-21 12:17:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:17,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:17,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:17,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:18,167 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 [2021-08-21 12:17:18,167 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:18,167 INFO L82 PathProgramCache]: Analyzing trace with hash 889456409, now seen corresponding path program 4 times [2021-08-21 12:17:18,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:18,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363626808] [2021-08-21 12:17:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:18,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363626808] [2021-08-21 12:17:18,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363626808] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:18,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:18,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:18,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073030020] [2021-08-21 12:17:18,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:18,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:18,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:18,249 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) [2021-08-21 12:17:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:18,399 INFO L93 Difference]: Finished difference Result 630 states and 1833 transitions. [2021-08-21 12:17:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:18,400 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 [2021-08-21 12:17:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:18,401 INFO L225 Difference]: With dead ends: 630 [2021-08-21 12:17:18,401 INFO L226 Difference]: Without dead ends: 630 [2021-08-21 12:17:18,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-08-21 12:17:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 288. [2021-08-21 12:17:18,407 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) [2021-08-21 12:17:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 918 transitions. [2021-08-21 12:17:18,408 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 918 transitions. Word has length 18 [2021-08-21 12:17:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:18,409 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 918 transitions. [2021-08-21 12:17:18,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 918 transitions. [2021-08-21 12:17:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:18,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:18,410 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:18,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-21 12:17:18,410 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1475366529, now seen corresponding path program 5 times [2021-08-21 12:17:18,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:18,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648119350] [2021-08-21 12:17:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:18,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648119350] [2021-08-21 12:17:18,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648119350] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:18,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:18,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:18,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697510352] [2021-08-21 12:17:18,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:18,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:18,498 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) [2021-08-21 12:17:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:18,708 INFO L93 Difference]: Finished difference Result 597 states and 1730 transitions. [2021-08-21 12:17:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:18,708 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 [2021-08-21 12:17:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:18,709 INFO L225 Difference]: With dead ends: 597 [2021-08-21 12:17:18,709 INFO L226 Difference]: Without dead ends: 579 [2021-08-21 12:17:18,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-21 12:17:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 288. [2021-08-21 12:17:18,714 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) [2021-08-21 12:17:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 913 transitions. [2021-08-21 12:17:18,715 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 913 transitions. Word has length 18 [2021-08-21 12:17:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:18,715 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 913 transitions. [2021-08-21 12:17:18,715 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) [2021-08-21 12:17:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 913 transitions. [2021-08-21 12:17:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:18,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:18,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:18,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-21 12:17:18,716 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:18,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:18,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1380628897, now seen corresponding path program 5 times [2021-08-21 12:17:18,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:18,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071175237] [2021-08-21 12:17:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:18,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071175237] [2021-08-21 12:17:18,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071175237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:18,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:18,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:18,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831784515] [2021-08-21 12:17:18,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:18,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:18,774 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) [2021-08-21 12:17:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:18,910 INFO L93 Difference]: Finished difference Result 671 states and 1926 transitions. [2021-08-21 12:17:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:18,911 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 [2021-08-21 12:17:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:18,912 INFO L225 Difference]: With dead ends: 671 [2021-08-21 12:17:18,912 INFO L226 Difference]: Without dead ends: 671 [2021-08-21 12:17:18,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-08-21 12:17:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 294. [2021-08-21 12:17:18,917 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) [2021-08-21 12:17:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 938 transitions. [2021-08-21 12:17:18,918 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 938 transitions. Word has length 18 [2021-08-21 12:17:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:18,918 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 938 transitions. [2021-08-21 12:17:18,918 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) [2021-08-21 12:17:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 938 transitions. [2021-08-21 12:17:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:18,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:18,919 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:18,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-21 12:17:18,919 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash -498551463, now seen corresponding path program 6 times [2021-08-21 12:17:18,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:18,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999164328] [2021-08-21 12:17:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:18,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999164328] [2021-08-21 12:17:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999164328] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:18,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:18,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:18,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627166851] [2021-08-21 12:17:18,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:18,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:18,976 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) [2021-08-21 12:17:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:19,103 INFO L93 Difference]: Finished difference Result 628 states and 1817 transitions. [2021-08-21 12:17:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:19,104 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 [2021-08-21 12:17:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:19,106 INFO L225 Difference]: With dead ends: 628 [2021-08-21 12:17:19,106 INFO L226 Difference]: Without dead ends: 622 [2021-08-21 12:17:19,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-21 12:17:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 292. [2021-08-21 12:17:19,117 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) [2021-08-21 12:17:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 927 transitions. [2021-08-21 12:17:19,118 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 927 transitions. Word has length 18 [2021-08-21 12:17:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:19,118 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 927 transitions. [2021-08-21 12:17:19,118 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) [2021-08-21 12:17:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 927 transitions. [2021-08-21 12:17:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:19,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:19,119 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:19,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-21 12:17:19,119 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash 454705420, now seen corresponding path program 6 times [2021-08-21 12:17:19,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:19,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275692101] [2021-08-21 12:17:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:19,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:19,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:19,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275692101] [2021-08-21 12:17:19,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275692101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:19,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598037683] [2021-08-21 12:17:19,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:19,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:19,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:19,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:17:19,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2021-08-21 12:17:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:17:19,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:17:19,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598037683] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:19,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:19,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-21 12:17:19,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593040541] [2021-08-21 12:17:19,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:17:19,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:17:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:19,707 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) [2021-08-21 12:17:19,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:19,872 INFO L93 Difference]: Finished difference Result 440 states and 1318 transitions. [2021-08-21 12:17:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:17:19,873 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 [2021-08-21 12:17:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:19,874 INFO L225 Difference]: With dead ends: 440 [2021-08-21 12:17:19,874 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 12:17:19,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 12:17:19,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 276. [2021-08-21 12:17:19,878 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) [2021-08-21 12:17:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-08-21 12:17:19,878 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-08-21 12:17:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:19,878 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-08-21 12:17:19,878 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) [2021-08-21 12:17:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-08-21 12:17:19,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:19,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:19,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:19,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 12:17:20,092 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 [2021-08-21 12:17:20,093 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1912530013, now seen corresponding path program 7 times [2021-08-21 12:17:20,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:20,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411101352] [2021-08-21 12:17:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:20,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:20,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:20,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411101352] [2021-08-21 12:17:20,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411101352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:20,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277823289] [2021-08-21 12:17:20,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:20,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:20,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:20,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:20,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:17:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:20,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:20,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:20,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277823289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:20,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:20,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 12:17:20,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909843601] [2021-08-21 12:17:20,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:17:20,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:17:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:20,572 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) [2021-08-21 12:17:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:20,794 INFO L93 Difference]: Finished difference Result 625 states and 1805 transitions. [2021-08-21 12:17:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:20,795 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 [2021-08-21 12:17:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:20,796 INFO L225 Difference]: With dead ends: 625 [2021-08-21 12:17:20,796 INFO L226 Difference]: Without dead ends: 625 [2021-08-21 12:17:20,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-08-21 12:17:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 266. [2021-08-21 12:17:20,801 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) [2021-08-21 12:17:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 826 transitions. [2021-08-21 12:17:20,801 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 826 transitions. Word has length 18 [2021-08-21 12:17:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:20,801 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 826 transitions. [2021-08-21 12:17:20,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 826 transitions. [2021-08-21 12:17:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:20,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:20,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:20,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:21,005 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 [2021-08-21 12:17:21,005 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:21,005 INFO L82 PathProgramCache]: Analyzing trace with hash -701371553, now seen corresponding path program 8 times [2021-08-21 12:17:21,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:21,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322210719] [2021-08-21 12:17:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:21,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:21,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:21,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322210719] [2021-08-21 12:17:21,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322210719] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:21,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:21,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:21,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559549505] [2021-08-21 12:17:21,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:21,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:21,069 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) [2021-08-21 12:17:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:21,200 INFO L93 Difference]: Finished difference Result 592 states and 1723 transitions. [2021-08-21 12:17:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:21,200 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 [2021-08-21 12:17:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:21,202 INFO L225 Difference]: With dead ends: 592 [2021-08-21 12:17:21,202 INFO L226 Difference]: Without dead ends: 592 [2021-08-21 12:17:21,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:21,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-21 12:17:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 269. [2021-08-21 12:17:21,207 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) [2021-08-21 12:17:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 841 transitions. [2021-08-21 12:17:21,207 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 841 transitions. Word has length 18 [2021-08-21 12:17:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:21,207 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 841 transitions. [2021-08-21 12:17:21,208 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) [2021-08-21 12:17:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 841 transitions. [2021-08-21 12:17:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:21,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:21,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:21,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-21 12:17:21,208 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash 572783301, now seen corresponding path program 9 times [2021-08-21 12:17:21,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:21,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575147006] [2021-08-21 12:17:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:21,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:21,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:21,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575147006] [2021-08-21 12:17:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575147006] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:21,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:21,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:21,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357421628] [2021-08-21 12:17:21,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:21,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:21,283 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) [2021-08-21 12:17:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:21,391 INFO L93 Difference]: Finished difference Result 559 states and 1646 transitions. [2021-08-21 12:17:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:21,391 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 [2021-08-21 12:17:21,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:21,392 INFO L225 Difference]: With dead ends: 559 [2021-08-21 12:17:21,392 INFO L226 Difference]: Without dead ends: 559 [2021-08-21 12:17:21,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-21 12:17:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 271. [2021-08-21 12:17:21,400 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) [2021-08-21 12:17:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 848 transitions. [2021-08-21 12:17:21,401 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 848 transitions. Word has length 18 [2021-08-21 12:17:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:21,401 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 848 transitions. [2021-08-21 12:17:21,401 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) [2021-08-21 12:17:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 848 transitions. [2021-08-21 12:17:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:21,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:21,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:21,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-21 12:17:21,402 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1423509395, now seen corresponding path program 6 times [2021-08-21 12:17:21,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:21,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620980967] [2021-08-21 12:17:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:21,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:21,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:21,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620980967] [2021-08-21 12:17:21,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620980967] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:21,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:21,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:21,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088343211] [2021-08-21 12:17:21,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:21,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:21,487 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) [2021-08-21 12:17:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:21,596 INFO L93 Difference]: Finished difference Result 523 states and 1528 transitions. [2021-08-21 12:17:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:21,597 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 [2021-08-21 12:17:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:21,598 INFO L225 Difference]: With dead ends: 523 [2021-08-21 12:17:21,598 INFO L226 Difference]: Without dead ends: 505 [2021-08-21 12:17:21,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-21 12:17:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 275. [2021-08-21 12:17:21,602 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) [2021-08-21 12:17:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 858 transitions. [2021-08-21 12:17:21,603 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 858 transitions. Word has length 18 [2021-08-21 12:17:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 858 transitions. [2021-08-21 12:17:21,603 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) [2021-08-21 12:17:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 858 transitions. [2021-08-21 12:17:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:21,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:21,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:21,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-21 12:17:21,604 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash 366573125, now seen corresponding path program 7 times [2021-08-21 12:17:21,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:21,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360591454] [2021-08-21 12:17:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:21,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:21,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:21,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360591454] [2021-08-21 12:17:21,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360591454] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:21,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:21,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:21,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927984645] [2021-08-21 12:17:21,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:21,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:21,661 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) [2021-08-21 12:17:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:21,763 INFO L93 Difference]: Finished difference Result 513 states and 1507 transitions. [2021-08-21 12:17:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:21,764 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 [2021-08-21 12:17:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:21,765 INFO L225 Difference]: With dead ends: 513 [2021-08-21 12:17:21,765 INFO L226 Difference]: Without dead ends: 506 [2021-08-21 12:17:21,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-21 12:17:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 286. [2021-08-21 12:17:21,769 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) [2021-08-21 12:17:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 887 transitions. [2021-08-21 12:17:21,770 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 887 transitions. Word has length 18 [2021-08-21 12:17:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:21,770 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 887 transitions. [2021-08-21 12:17:21,770 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) [2021-08-21 12:17:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 887 transitions. [2021-08-21 12:17:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:21,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:21,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:21,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-21 12:17:21,771 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1435810591, now seen corresponding path program 8 times [2021-08-21 12:17:21,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:21,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899625964] [2021-08-21 12:17:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:21,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:21,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:21,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899625964] [2021-08-21 12:17:21,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899625964] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:21,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:21,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:21,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522268132] [2021-08-21 12:17:21,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:21,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:21,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:21,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:21,845 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) [2021-08-21 12:17:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:21,936 INFO L93 Difference]: Finished difference Result 482 states and 1450 transitions. [2021-08-21 12:17:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:21,937 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 [2021-08-21 12:17:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:21,938 INFO L225 Difference]: With dead ends: 482 [2021-08-21 12:17:21,938 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 12:17:21,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 12:17:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 275. [2021-08-21 12:17:21,942 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) [2021-08-21 12:17:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 858 transitions. [2021-08-21 12:17:21,942 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 858 transitions. Word has length 18 [2021-08-21 12:17:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:21,942 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 858 transitions. [2021-08-21 12:17:21,942 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) [2021-08-21 12:17:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 858 transitions. [2021-08-21 12:17:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:21,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:21,943 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:21,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-21 12:17:21,943 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash -178316529, now seen corresponding path program 10 times [2021-08-21 12:17:21,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:21,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251902357] [2021-08-21 12:17:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:21,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:22,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:22,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251902357] [2021-08-21 12:17:22,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251902357] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:22,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:22,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:22,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101109756] [2021-08-21 12:17:22,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:22,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:22,011 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) [2021-08-21 12:17:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:22,137 INFO L93 Difference]: Finished difference Result 605 states and 1753 transitions. [2021-08-21 12:17:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:22,137 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 [2021-08-21 12:17:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:22,138 INFO L225 Difference]: With dead ends: 605 [2021-08-21 12:17:22,138 INFO L226 Difference]: Without dead ends: 605 [2021-08-21 12:17:22,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-21 12:17:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 283. [2021-08-21 12:17:22,143 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) [2021-08-21 12:17:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 895 transitions. [2021-08-21 12:17:22,144 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 895 transitions. Word has length 18 [2021-08-21 12:17:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:22,144 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 895 transitions. [2021-08-21 12:17:22,144 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) [2021-08-21 12:17:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 895 transitions. [2021-08-21 12:17:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:22,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:22,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:22,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-21 12:17:22,145 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash 703760905, now seen corresponding path program 11 times [2021-08-21 12:17:22,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:22,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135266448] [2021-08-21 12:17:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:22,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:22,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:22,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135266448] [2021-08-21 12:17:22,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135266448] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:22,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:22,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:22,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806721832] [2021-08-21 12:17:22,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:22,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:22,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:22,201 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) [2021-08-21 12:17:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:22,324 INFO L93 Difference]: Finished difference Result 591 states and 1702 transitions. [2021-08-21 12:17:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:22,324 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 [2021-08-21 12:17:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:22,325 INFO L225 Difference]: With dead ends: 591 [2021-08-21 12:17:22,325 INFO L226 Difference]: Without dead ends: 585 [2021-08-21 12:17:22,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-21 12:17:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 286. [2021-08-21 12:17:22,330 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) [2021-08-21 12:17:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 897 transitions. [2021-08-21 12:17:22,331 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 897 transitions. Word has length 18 [2021-08-21 12:17:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:22,331 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 897 transitions. [2021-08-21 12:17:22,331 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) [2021-08-21 12:17:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 897 transitions. [2021-08-21 12:17:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:22,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:22,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:22,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-21 12:17:22,332 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:22,332 INFO L82 PathProgramCache]: Analyzing trace with hash 562580805, now seen corresponding path program 12 times [2021-08-21 12:17:22,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:22,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242834723] [2021-08-21 12:17:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:22,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:22,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:22,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242834723] [2021-08-21 12:17:22,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242834723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:22,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225247622] [2021-08-21 12:17:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:22,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:22,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:22,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:17:22,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:17:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:22,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:22,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225247622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:22,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:22,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:17:22,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169411382] [2021-08-21 12:17:22,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:17:22,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:17:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:22,827 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) [2021-08-21 12:17:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:23,072 INFO L93 Difference]: Finished difference Result 601 states and 1736 transitions. [2021-08-21 12:17:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:23,072 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 [2021-08-21 12:17:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:23,073 INFO L225 Difference]: With dead ends: 601 [2021-08-21 12:17:23,073 INFO L226 Difference]: Without dead ends: 601 [2021-08-21 12:17:23,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-21 12:17:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 279. [2021-08-21 12:17:23,078 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) [2021-08-21 12:17:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 879 transitions. [2021-08-21 12:17:23,078 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 879 transitions. Word has length 18 [2021-08-21 12:17:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:23,078 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 879 transitions. [2021-08-21 12:17:23,078 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) [2021-08-21 12:17:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 879 transitions. [2021-08-21 12:17:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:23,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:23,079 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:23,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:23,279 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 [2021-08-21 12:17:23,280 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:23,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1556956425, now seen corresponding path program 13 times [2021-08-21 12:17:23,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:23,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516768677] [2021-08-21 12:17:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:23,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:23,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:23,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516768677] [2021-08-21 12:17:23,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516768677] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:23,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:23,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:23,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733951013] [2021-08-21 12:17:23,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:23,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:23,354 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) [2021-08-21 12:17:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:23,456 INFO L93 Difference]: Finished difference Result 570 states and 1669 transitions. [2021-08-21 12:17:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:23,456 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 [2021-08-21 12:17:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:23,458 INFO L225 Difference]: With dead ends: 570 [2021-08-21 12:17:23,458 INFO L226 Difference]: Without dead ends: 570 [2021-08-21 12:17:23,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-21 12:17:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 276. [2021-08-21 12:17:23,462 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) [2021-08-21 12:17:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 864 transitions. [2021-08-21 12:17:23,463 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 864 transitions. Word has length 18 [2021-08-21 12:17:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:23,463 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 864 transitions. [2021-08-21 12:17:23,464 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) [2021-08-21 12:17:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 864 transitions. [2021-08-21 12:17:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:23,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:23,465 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-21 12:17:23,465 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1757557739, now seen corresponding path program 14 times [2021-08-21 12:17:23,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:23,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857694703] [2021-08-21 12:17:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:23,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:23,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:23,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857694703] [2021-08-21 12:17:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857694703] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:23,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:23,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:23,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126243379] [2021-08-21 12:17:23,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:23,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:23,532 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) [2021-08-21 12:17:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:23,628 INFO L93 Difference]: Finished difference Result 536 states and 1556 transitions. [2021-08-21 12:17:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:23,629 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 [2021-08-21 12:17:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:23,633 INFO L225 Difference]: With dead ends: 536 [2021-08-21 12:17:23,633 INFO L226 Difference]: Without dead ends: 530 [2021-08-21 12:17:23,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-08-21 12:17:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 286. [2021-08-21 12:17:23,637 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) [2021-08-21 12:17:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 891 transitions. [2021-08-21 12:17:23,638 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 891 transitions. Word has length 18 [2021-08-21 12:17:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:23,638 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 891 transitions. [2021-08-21 12:17:23,638 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) [2021-08-21 12:17:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 891 transitions. [2021-08-21 12:17:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:23,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:23,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:23,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-21 12:17:23,639 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:23,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1733657825, now seen corresponding path program 15 times [2021-08-21 12:17:23,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:23,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518801998] [2021-08-21 12:17:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:23,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:23,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:23,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518801998] [2021-08-21 12:17:23,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518801998] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:23,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:23,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:23,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328682712] [2021-08-21 12:17:23,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:23,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:23,709 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) [2021-08-21 12:17:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:23,804 INFO L93 Difference]: Finished difference Result 513 states and 1517 transitions. [2021-08-21 12:17:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:23,804 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 [2021-08-21 12:17:23,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:23,805 INFO L225 Difference]: With dead ends: 513 [2021-08-21 12:17:23,805 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 12:17:23,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 12:17:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 278. [2021-08-21 12:17:23,810 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) [2021-08-21 12:17:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 869 transitions. [2021-08-21 12:17:23,810 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 869 transitions. Word has length 18 [2021-08-21 12:17:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:23,810 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 869 transitions. [2021-08-21 12:17:23,810 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) [2021-08-21 12:17:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 869 transitions. [2021-08-21 12:17:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:23,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:23,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:23,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-21 12:17:23,811 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -907635435, now seen corresponding path program 9 times [2021-08-21 12:17:23,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:23,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145377515] [2021-08-21 12:17:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:23,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:23,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:23,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145377515] [2021-08-21 12:17:23,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145377515] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:23,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:23,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:23,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391977339] [2021-08-21 12:17:23,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:23,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:23,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:23,869 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) [2021-08-21 12:17:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:24,002 INFO L93 Difference]: Finished difference Result 576 states and 1655 transitions. [2021-08-21 12:17:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:24,002 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 [2021-08-21 12:17:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:24,003 INFO L225 Difference]: With dead ends: 576 [2021-08-21 12:17:24,003 INFO L226 Difference]: Without dead ends: 569 [2021-08-21 12:17:24,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-21 12:17:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 297. [2021-08-21 12:17:24,008 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) [2021-08-21 12:17:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 925 transitions. [2021-08-21 12:17:24,008 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 925 transitions. Word has length 18 [2021-08-21 12:17:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 925 transitions. [2021-08-21 12:17:24,009 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) [2021-08-21 12:17:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 925 transitions. [2021-08-21 12:17:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:24,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:24,009 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:24,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-21 12:17:24,009 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1256692637, now seen corresponding path program 10 times [2021-08-21 12:17:24,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:24,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753873241] [2021-08-21 12:17:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:24,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:24,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:24,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753873241] [2021-08-21 12:17:24,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753873241] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:24,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:24,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:24,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694681102] [2021-08-21 12:17:24,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:24,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:24,069 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) [2021-08-21 12:17:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:24,203 INFO L93 Difference]: Finished difference Result 578 states and 1668 transitions. [2021-08-21 12:17:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:24,203 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 [2021-08-21 12:17:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:24,204 INFO L225 Difference]: With dead ends: 578 [2021-08-21 12:17:24,204 INFO L226 Difference]: Without dead ends: 578 [2021-08-21 12:17:24,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-21 12:17:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 294. [2021-08-21 12:17:24,209 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) [2021-08-21 12:17:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 917 transitions. [2021-08-21 12:17:24,210 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 917 transitions. Word has length 18 [2021-08-21 12:17:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:24,210 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 917 transitions. [2021-08-21 12:17:24,210 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) [2021-08-21 12:17:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 917 transitions. [2021-08-21 12:17:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:24,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:24,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:24,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-21 12:17:24,211 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1791922439, now seen corresponding path program 11 times [2021-08-21 12:17:24,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:24,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999389896] [2021-08-21 12:17:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:24,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:24,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:24,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999389896] [2021-08-21 12:17:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999389896] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:24,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:24,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:24,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349395680] [2021-08-21 12:17:24,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:24,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:24,262 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) [2021-08-21 12:17:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:24,380 INFO L93 Difference]: Finished difference Result 612 states and 1768 transitions. [2021-08-21 12:17:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:24,380 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 [2021-08-21 12:17:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:24,382 INFO L225 Difference]: With dead ends: 612 [2021-08-21 12:17:24,382 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 12:17:24,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 12:17:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 291. [2021-08-21 12:17:24,387 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) [2021-08-21 12:17:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 909 transitions. [2021-08-21 12:17:24,388 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 909 transitions. Word has length 18 [2021-08-21 12:17:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:24,388 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 909 transitions. [2021-08-21 12:17:24,388 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) [2021-08-21 12:17:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 909 transitions. [2021-08-21 12:17:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:24,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:24,389 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:24,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-08-21 12:17:24,389 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1474113580, now seen corresponding path program 7 times [2021-08-21 12:17:24,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:24,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432663903] [2021-08-21 12:17:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:24,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:24,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:24,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432663903] [2021-08-21 12:17:24,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432663903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:24,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168049237] [2021-08-21 12:17:24,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:24,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:24,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:24,469 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:24,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:17:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:24,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:24,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168049237] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:24,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:24,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-08-21 12:17:24,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598408174] [2021-08-21 12:17:24,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:24,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:24,869 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) [2021-08-21 12:17:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:24,999 INFO L93 Difference]: Finished difference Result 535 states and 1604 transitions. [2021-08-21 12:17:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:24,999 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 [2021-08-21 12:17:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:25,000 INFO L225 Difference]: With dead ends: 535 [2021-08-21 12:17:25,001 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 12:17:25,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 12:17:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 295. [2021-08-21 12:17:25,005 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) [2021-08-21 12:17:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 925 transitions. [2021-08-21 12:17:25,006 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 925 transitions. Word has length 18 [2021-08-21 12:17:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:25,006 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 925 transitions. [2021-08-21 12:17:25,006 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) [2021-08-21 12:17:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 925 transitions. [2021-08-21 12:17:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:25,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:25,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:25,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:25,207 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 [2021-08-21 12:17:25,207 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1300865888, now seen corresponding path program 8 times [2021-08-21 12:17:25,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:25,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714986285] [2021-08-21 12:17:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:25,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:25,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714986285] [2021-08-21 12:17:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714986285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345087130] [2021-08-21 12:17:25,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:25,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:25,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:25,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:17:25,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-21 12:17:25,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:17:25,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:17:25,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345087130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:25,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:25,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-21 12:17:25,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107119943] [2021-08-21 12:17:25,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:17:25,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:17:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:25,721 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) [2021-08-21 12:17:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:25,884 INFO L93 Difference]: Finished difference Result 422 states and 1259 transitions. [2021-08-21 12:17:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:17:25,884 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 [2021-08-21 12:17:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:25,885 INFO L225 Difference]: With dead ends: 422 [2021-08-21 12:17:25,885 INFO L226 Difference]: Without dead ends: 395 [2021-08-21 12:17:25,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-21 12:17:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 291. [2021-08-21 12:17:25,889 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) [2021-08-21 12:17:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 909 transitions. [2021-08-21 12:17:25,890 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 909 transitions. Word has length 18 [2021-08-21 12:17:25,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:25,890 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 909 transitions. [2021-08-21 12:17:25,890 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) [2021-08-21 12:17:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 909 transitions. [2021-08-21 12:17:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:25,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:25,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:25,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:26,092 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 [2021-08-21 12:17:26,093 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1026939001, now seen corresponding path program 16 times [2021-08-21 12:17:26,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:26,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780395341] [2021-08-21 12:17:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:26,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:26,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:26,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780395341] [2021-08-21 12:17:26,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780395341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:26,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:26,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:26,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749891985] [2021-08-21 12:17:26,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:26,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:26,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:26,164 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) [2021-08-21 12:17:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:26,304 INFO L93 Difference]: Finished difference Result 587 states and 1708 transitions. [2021-08-21 12:17:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:26,313 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 [2021-08-21 12:17:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:26,315 INFO L225 Difference]: With dead ends: 587 [2021-08-21 12:17:26,316 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 12:17:26,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 12:17:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 298. [2021-08-21 12:17:26,320 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) [2021-08-21 12:17:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 940 transitions. [2021-08-21 12:17:26,321 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 940 transitions. Word has length 18 [2021-08-21 12:17:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:26,322 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 940 transitions. [2021-08-21 12:17:26,322 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) [2021-08-21 12:17:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 940 transitions. [2021-08-21 12:17:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:26,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:26,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:26,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-21 12:17:26,324 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:26,324 INFO L82 PathProgramCache]: Analyzing trace with hash -144861567, now seen corresponding path program 17 times [2021-08-21 12:17:26,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:26,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781175253] [2021-08-21 12:17:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:26,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:26,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:26,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781175253] [2021-08-21 12:17:26,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781175253] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:26,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:26,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:26,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514001106] [2021-08-21 12:17:26,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:26,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:26,397 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) [2021-08-21 12:17:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:26,533 INFO L93 Difference]: Finished difference Result 593 states and 1709 transitions. [2021-08-21 12:17:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:26,533 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 [2021-08-21 12:17:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:26,535 INFO L225 Difference]: With dead ends: 593 [2021-08-21 12:17:26,535 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 12:17:26,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 12:17:26,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 301. [2021-08-21 12:17:26,540 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) [2021-08-21 12:17:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 942 transitions. [2021-08-21 12:17:26,540 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 942 transitions. Word has length 18 [2021-08-21 12:17:26,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:26,540 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 942 transitions. [2021-08-21 12:17:26,540 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) [2021-08-21 12:17:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 942 transitions. [2021-08-21 12:17:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:26,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:26,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:26,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-21 12:17:26,541 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash 780242416, now seen corresponding path program 9 times [2021-08-21 12:17:26,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:26,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099864857] [2021-08-21 12:17:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:26,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:26,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:26,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099864857] [2021-08-21 12:17:26,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099864857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:26,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599948834] [2021-08-21 12:17:26,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:26,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:26,621 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:26,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:17:26,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-08-21 12:17:26,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:17:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:17:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599948834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:27,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 12:17:27,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-08-21 12:17:27,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596141142] [2021-08-21 12:17:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:17:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:17:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:27,303 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) [2021-08-21 12:17:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:27,452 INFO L93 Difference]: Finished difference Result 445 states and 1328 transitions. [2021-08-21 12:17:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:17:27,453 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 [2021-08-21 12:17:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:27,454 INFO L225 Difference]: With dead ends: 445 [2021-08-21 12:17:27,454 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 12:17:27,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 12:17:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 285. [2021-08-21 12:17:27,458 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) [2021-08-21 12:17:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 880 transitions. [2021-08-21 12:17:27,458 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 880 transitions. Word has length 18 [2021-08-21 12:17:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:27,458 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 880 transitions. [2021-08-21 12:17:27,458 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) [2021-08-21 12:17:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 880 transitions. [2021-08-21 12:17:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:27,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:27,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:27,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:27,660 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 [2021-08-21 12:17:27,661 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash -286041667, now seen corresponding path program 18 times [2021-08-21 12:17:27,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:27,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353205638] [2021-08-21 12:17:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:27,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:27,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:27,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353205638] [2021-08-21 12:17:27,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353205638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:27,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499642633] [2021-08-21 12:17:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:27,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:27,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:27,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:17:28,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:17:28,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:28,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499642633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:28,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:28,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:17:28,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669649548] [2021-08-21 12:17:28,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:17:28,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:17:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:28,323 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) [2021-08-21 12:17:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:28,663 INFO L93 Difference]: Finished difference Result 562 states and 1608 transitions. [2021-08-21 12:17:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:28,663 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 [2021-08-21 12:17:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:28,664 INFO L225 Difference]: With dead ends: 562 [2021-08-21 12:17:28,664 INFO L226 Difference]: Without dead ends: 562 [2021-08-21 12:17:28,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-21 12:17:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 278. [2021-08-21 12:17:28,669 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) [2021-08-21 12:17:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 862 transitions. [2021-08-21 12:17:28,669 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 862 transitions. Word has length 18 [2021-08-21 12:17:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:28,669 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 862 transitions. [2021-08-21 12:17:28,669 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) [2021-08-21 12:17:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 862 transitions. [2021-08-21 12:17:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:28,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:28,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:28,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:28,884 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 [2021-08-21 12:17:28,885 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash 708333953, now seen corresponding path program 19 times [2021-08-21 12:17:28,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:28,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742187159] [2021-08-21 12:17:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:28,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:28,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:28,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742187159] [2021-08-21 12:17:28,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742187159] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:28,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:28,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433959310] [2021-08-21 12:17:28,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:28,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:28,954 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) [2021-08-21 12:17:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,043 INFO L93 Difference]: Finished difference Result 525 states and 1526 transitions. [2021-08-21 12:17:29,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:29,043 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 [2021-08-21 12:17:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,044 INFO L225 Difference]: With dead ends: 525 [2021-08-21 12:17:29,044 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 12:17:29,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 12:17:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 275. [2021-08-21 12:17:29,048 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) [2021-08-21 12:17:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 847 transitions. [2021-08-21 12:17:29,049 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 847 transitions. Word has length 18 [2021-08-21 12:17:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,049 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 847 transitions. [2021-08-21 12:17:29,049 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) [2021-08-21 12:17:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 847 transitions. [2021-08-21 12:17:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:29,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-21 12:17:29,050 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1688787085, now seen corresponding path program 20 times [2021-08-21 12:17:29,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144065988] [2021-08-21 12:17:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:29,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:29,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144065988] [2021-08-21 12:17:29,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144065988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:29,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:29,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:29,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653663697] [2021-08-21 12:17:29,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:29,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:29,111 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) [2021-08-21 12:17:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,221 INFO L93 Difference]: Finished difference Result 562 states and 1600 transitions. [2021-08-21 12:17:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:29,221 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 [2021-08-21 12:17:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,223 INFO L225 Difference]: With dead ends: 562 [2021-08-21 12:17:29,223 INFO L226 Difference]: Without dead ends: 556 [2021-08-21 12:17:29,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-21 12:17:29,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 285. [2021-08-21 12:17:29,232 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) [2021-08-21 12:17:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-21 12:17:29,232 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-21 12:17:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,232 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-21 12:17:29,232 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) [2021-08-21 12:17:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-21 12:17:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:29,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-21 12:17:29,233 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1712686999, now seen corresponding path program 21 times [2021-08-21 12:17:29,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911388438] [2021-08-21 12:17:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:29,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:29,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911388438] [2021-08-21 12:17:29,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911388438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:29,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:29,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:29,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940494711] [2021-08-21 12:17:29,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:29,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:29,298 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) [2021-08-21 12:17:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,390 INFO L93 Difference]: Finished difference Result 539 states and 1561 transitions. [2021-08-21 12:17:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:29,391 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 [2021-08-21 12:17:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,392 INFO L225 Difference]: With dead ends: 539 [2021-08-21 12:17:29,392 INFO L226 Difference]: Without dead ends: 539 [2021-08-21 12:17:29,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-21 12:17:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 274. [2021-08-21 12:17:29,396 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) [2021-08-21 12:17:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 841 transitions. [2021-08-21 12:17:29,396 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 841 transitions. Word has length 18 [2021-08-21 12:17:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,396 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 841 transitions. [2021-08-21 12:17:29,396 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) [2021-08-21 12:17:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 841 transitions. [2021-08-21 12:17:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:29,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-21 12:17:29,397 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash -686499573, now seen corresponding path program 12 times [2021-08-21 12:17:29,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004217570] [2021-08-21 12:17:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:29,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:29,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004217570] [2021-08-21 12:17:29,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004217570] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:29,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:29,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:29,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812141474] [2021-08-21 12:17:29,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:29,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:29,446 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) [2021-08-21 12:17:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,552 INFO L93 Difference]: Finished difference Result 576 states and 1656 transitions. [2021-08-21 12:17:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:29,553 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 [2021-08-21 12:17:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,554 INFO L225 Difference]: With dead ends: 576 [2021-08-21 12:17:29,554 INFO L226 Difference]: Without dead ends: 576 [2021-08-21 12:17:29,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-08-21 12:17:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 261. [2021-08-21 12:17:29,558 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) [2021-08-21 12:17:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 801 transitions. [2021-08-21 12:17:29,558 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 801 transitions. Word has length 18 [2021-08-21 12:17:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,559 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 801 transitions. [2021-08-21 12:17:29,559 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) [2021-08-21 12:17:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 801 transitions. [2021-08-21 12:17:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:29,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-21 12:17:29,559 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash -846127271, now seen corresponding path program 22 times [2021-08-21 12:17:29,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042855741] [2021-08-21 12:17:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:29,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:29,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042855741] [2021-08-21 12:17:29,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042855741] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:29,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:29,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:29,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728136345] [2021-08-21 12:17:29,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:29,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:29,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:29,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:29,618 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) [2021-08-21 12:17:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,718 INFO L93 Difference]: Finished difference Result 487 states and 1399 transitions. [2021-08-21 12:17:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:29,719 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 [2021-08-21 12:17:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,720 INFO L225 Difference]: With dead ends: 487 [2021-08-21 12:17:29,720 INFO L226 Difference]: Without dead ends: 481 [2021-08-21 12:17:29,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-21 12:17:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 273. [2021-08-21 12:17:29,724 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) [2021-08-21 12:17:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 833 transitions. [2021-08-21 12:17:29,724 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 833 transitions. Word has length 18 [2021-08-21 12:17:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,724 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 833 transitions. [2021-08-21 12:17:29,724 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) [2021-08-21 12:17:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 833 transitions. [2021-08-21 12:17:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:29,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,725 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-21 12:17:29,725 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,725 INFO L82 PathProgramCache]: Analyzing trace with hash -822227357, now seen corresponding path program 23 times [2021-08-21 12:17:29,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081032857] [2021-08-21 12:17:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:29,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:29,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081032857] [2021-08-21 12:17:29,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081032857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:29,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:29,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:29,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289991892] [2021-08-21 12:17:29,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:29,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:29,787 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) [2021-08-21 12:17:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,874 INFO L93 Difference]: Finished difference Result 458 states and 1345 transitions. [2021-08-21 12:17:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:29,874 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 [2021-08-21 12:17:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,875 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:17:29,875 INFO L226 Difference]: Without dead ends: 458 [2021-08-21 12:17:29,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-21 12:17:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 263. [2021-08-21 12:17:29,879 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) [2021-08-21 12:17:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 806 transitions. [2021-08-21 12:17:29,879 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 806 transitions. Word has length 18 [2021-08-21 12:17:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,879 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 806 transitions. [2021-08-21 12:17:29,879 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) [2021-08-21 12:17:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 806 transitions. [2021-08-21 12:17:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:29,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,880 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-21 12:17:29,880 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,881 INFO L82 PathProgramCache]: Analyzing trace with hash 404240159, now seen corresponding path program 24 times [2021-08-21 12:17:29,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762451452] [2021-08-21 12:17:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:29,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:29,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762451452] [2021-08-21 12:17:29,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762451452] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:29,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:29,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:29,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543574364] [2021-08-21 12:17:29,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:29,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:29,950 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) [2021-08-21 12:17:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:30,057 INFO L93 Difference]: Finished difference Result 436 states and 1281 transitions. [2021-08-21 12:17:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:30,058 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 [2021-08-21 12:17:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:30,058 INFO L225 Difference]: With dead ends: 436 [2021-08-21 12:17:30,058 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:17:30,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:17:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 270. [2021-08-21 12:17:30,062 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) [2021-08-21 12:17:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 834 transitions. [2021-08-21 12:17:30,063 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 834 transitions. Word has length 18 [2021-08-21 12:17:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:30,063 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 834 transitions. [2021-08-21 12:17:30,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 834 transitions. [2021-08-21 12:17:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:30,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:30,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:30,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-21 12:17:30,064 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash 990150279, now seen corresponding path program 13 times [2021-08-21 12:17:30,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:30,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630069420] [2021-08-21 12:17:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:30,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:30,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:30,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630069420] [2021-08-21 12:17:30,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630069420] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:30,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:30,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:30,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239448015] [2021-08-21 12:17:30,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:30,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:30,147 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) [2021-08-21 12:17:30,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:30,232 INFO L93 Difference]: Finished difference Result 487 states and 1391 transitions. [2021-08-21 12:17:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:30,233 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 [2021-08-21 12:17:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:30,234 INFO L225 Difference]: With dead ends: 487 [2021-08-21 12:17:30,234 INFO L226 Difference]: Without dead ends: 469 [2021-08-21 12:17:30,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-21 12:17:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 270. [2021-08-21 12:17:30,237 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) [2021-08-21 12:17:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 829 transitions. [2021-08-21 12:17:30,238 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 829 transitions. Word has length 18 [2021-08-21 12:17:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:30,238 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 829 transitions. [2021-08-21 12:17:30,238 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) [2021-08-21 12:17:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 829 transitions. [2021-08-21 12:17:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:30,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:30,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:30,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-21 12:17:30,239 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1865845147, now seen corresponding path program 25 times [2021-08-21 12:17:30,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:30,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857202134] [2021-08-21 12:17:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:30,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:30,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:30,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857202134] [2021-08-21 12:17:30,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857202134] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:30,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:30,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:30,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038649349] [2021-08-21 12:17:30,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:30,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:30,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:30,306 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) [2021-08-21 12:17:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:30,447 INFO L93 Difference]: Finished difference Result 477 states and 1374 transitions. [2021-08-21 12:17:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:30,448 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 [2021-08-21 12:17:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:30,449 INFO L225 Difference]: With dead ends: 477 [2021-08-21 12:17:30,449 INFO L226 Difference]: Without dead ends: 477 [2021-08-21 12:17:30,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-08-21 12:17:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 276. [2021-08-21 12:17:30,458 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) [2021-08-21 12:17:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 854 transitions. [2021-08-21 12:17:30,458 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 854 transitions. Word has length 18 [2021-08-21 12:17:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:30,458 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 854 transitions. [2021-08-21 12:17:30,458 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) [2021-08-21 12:17:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 854 transitions. [2021-08-21 12:17:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:30,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:30,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:30,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-21 12:17:30,459 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -983767713, now seen corresponding path program 26 times [2021-08-21 12:17:30,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:30,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813360269] [2021-08-21 12:17:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:30,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:30,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:30,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813360269] [2021-08-21 12:17:30,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813360269] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:30,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:30,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:30,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318938992] [2021-08-21 12:17:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:30,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:30,516 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) [2021-08-21 12:17:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:30,634 INFO L93 Difference]: Finished difference Result 434 states and 1265 transitions. [2021-08-21 12:17:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:30,636 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 [2021-08-21 12:17:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:30,637 INFO L225 Difference]: With dead ends: 434 [2021-08-21 12:17:30,637 INFO L226 Difference]: Without dead ends: 428 [2021-08-21 12:17:30,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-21 12:17:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 274. [2021-08-21 12:17:30,641 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) [2021-08-21 12:17:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 843 transitions. [2021-08-21 12:17:30,641 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 843 transitions. Word has length 18 [2021-08-21 12:17:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:30,641 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 843 transitions. [2021-08-21 12:17:30,641 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) [2021-08-21 12:17:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 843 transitions. [2021-08-21 12:17:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:30,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:30,642 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:30,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-21 12:17:30,642 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:30,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:30,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1897221033, now seen corresponding path program 27 times [2021-08-21 12:17:30,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:30,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911814967] [2021-08-21 12:17:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:30,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:30,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:30,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911814967] [2021-08-21 12:17:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911814967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:30,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264814820] [2021-08-21 12:17:30,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:30,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:30,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:30,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:17:31,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:17:31,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:31,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264814820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:31,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:31,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 12:17:31,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833191934] [2021-08-21 12:17:31,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:17:31,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:17:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:31,194 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) [2021-08-21 12:17:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:31,287 INFO L93 Difference]: Finished difference Result 548 states and 1586 transitions. [2021-08-21 12:17:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:31,288 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 [2021-08-21 12:17:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:31,288 INFO L225 Difference]: With dead ends: 548 [2021-08-21 12:17:31,289 INFO L226 Difference]: Without dead ends: 548 [2021-08-21 12:17:31,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-08-21 12:17:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 280. [2021-08-21 12:17:31,292 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) [2021-08-21 12:17:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-08-21 12:17:31,293 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-08-21 12:17:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:31,293 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-08-21 12:17:31,293 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) [2021-08-21 12:17:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-08-21 12:17:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:31,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:31,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:31,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:31,495 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 [2021-08-21 12:17:31,496 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1186587803, now seen corresponding path program 28 times [2021-08-21 12:17:31,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:31,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076146814] [2021-08-21 12:17:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:31,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:31,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:31,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076146814] [2021-08-21 12:17:31,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076146814] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:31,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:31,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:31,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202105633] [2021-08-21 12:17:31,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:31,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:31,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:31,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:31,556 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) [2021-08-21 12:17:31,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:31,700 INFO L93 Difference]: Finished difference Result 515 states and 1504 transitions. [2021-08-21 12:17:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:31,701 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 [2021-08-21 12:17:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:31,701 INFO L225 Difference]: With dead ends: 515 [2021-08-21 12:17:31,702 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 12:17:31,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 12:17:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 283. [2021-08-21 12:17:31,706 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) [2021-08-21 12:17:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 882 transitions. [2021-08-21 12:17:31,707 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 882 transitions. Word has length 18 [2021-08-21 12:17:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:31,707 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 882 transitions. [2021-08-21 12:17:31,707 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) [2021-08-21 12:17:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 882 transitions. [2021-08-21 12:17:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:31,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:31,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:31,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-08-21 12:17:31,708 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:31,708 INFO L82 PathProgramCache]: Analyzing trace with hash 87567051, now seen corresponding path program 29 times [2021-08-21 12:17:31,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:31,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130736982] [2021-08-21 12:17:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:31,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:31,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:31,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130736982] [2021-08-21 12:17:31,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130736982] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:31,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:31,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:31,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891659530] [2021-08-21 12:17:31,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:31,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:31,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:31,767 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) [2021-08-21 12:17:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:31,867 INFO L93 Difference]: Finished difference Result 482 states and 1427 transitions. [2021-08-21 12:17:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:31,867 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 [2021-08-21 12:17:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:31,868 INFO L225 Difference]: With dead ends: 482 [2021-08-21 12:17:31,868 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 12:17:31,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 12:17:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 274. [2021-08-21 12:17:31,872 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) [2021-08-21 12:17:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 843 transitions. [2021-08-21 12:17:31,872 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 843 transitions. Word has length 18 [2021-08-21 12:17:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:31,872 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 843 transitions. [2021-08-21 12:17:31,872 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) [2021-08-21 12:17:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 843 transitions. [2021-08-21 12:17:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:31,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:31,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:31,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-21 12:17:31,873 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1908725645, now seen corresponding path program 14 times [2021-08-21 12:17:31,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:31,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597807287] [2021-08-21 12:17:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:31,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:31,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:31,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597807287] [2021-08-21 12:17:31,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597807287] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:31,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:31,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:31,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918530357] [2021-08-21 12:17:31,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:31,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:31,923 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) [2021-08-21 12:17:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:32,007 INFO L93 Difference]: Finished difference Result 542 states and 1526 transitions. [2021-08-21 12:17:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:32,007 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 [2021-08-21 12:17:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:32,008 INFO L225 Difference]: With dead ends: 542 [2021-08-21 12:17:32,008 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 12:17:32,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 12:17:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 278. [2021-08-21 12:17:32,012 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) [2021-08-21 12:17:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 853 transitions. [2021-08-21 12:17:32,013 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 853 transitions. Word has length 18 [2021-08-21 12:17:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:32,013 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 853 transitions. [2021-08-21 12:17:32,013 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) [2021-08-21 12:17:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 853 transitions. [2021-08-21 12:17:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:32,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:32,014 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:32,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-21 12:17:32,014 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash -118643125, now seen corresponding path program 15 times [2021-08-21 12:17:32,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:32,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933204945] [2021-08-21 12:17:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:32,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:32,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:32,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933204945] [2021-08-21 12:17:32,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933204945] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:32,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:32,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:32,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033404651] [2021-08-21 12:17:32,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:32,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:32,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:32,069 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) [2021-08-21 12:17:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:32,171 INFO L93 Difference]: Finished difference Result 532 states and 1505 transitions. [2021-08-21 12:17:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:32,171 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 [2021-08-21 12:17:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:32,172 INFO L225 Difference]: With dead ends: 532 [2021-08-21 12:17:32,172 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 12:17:32,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 12:17:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 289. [2021-08-21 12:17:32,177 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) [2021-08-21 12:17:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 882 transitions. [2021-08-21 12:17:32,177 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 882 transitions. Word has length 18 [2021-08-21 12:17:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:32,177 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 882 transitions. [2021-08-21 12:17:32,177 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) [2021-08-21 12:17:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 882 transitions. [2021-08-21 12:17:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:32,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:32,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:32,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-21 12:17:32,179 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:32,179 INFO L82 PathProgramCache]: Analyzing trace with hash 950594341, now seen corresponding path program 16 times [2021-08-21 12:17:32,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:32,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068952260] [2021-08-21 12:17:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:32,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:32,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:32,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068952260] [2021-08-21 12:17:32,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068952260] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:32,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:32,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:32,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719500180] [2021-08-21 12:17:32,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:32,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:32,236 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) [2021-08-21 12:17:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:32,342 INFO L93 Difference]: Finished difference Result 501 states and 1448 transitions. [2021-08-21 12:17:32,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:32,342 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 [2021-08-21 12:17:32,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:32,343 INFO L225 Difference]: With dead ends: 501 [2021-08-21 12:17:32,343 INFO L226 Difference]: Without dead ends: 501 [2021-08-21 12:17:32,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-21 12:17:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 274. [2021-08-21 12:17:32,347 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) [2021-08-21 12:17:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 843 transitions. [2021-08-21 12:17:32,347 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 843 transitions. Word has length 18 [2021-08-21 12:17:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:32,347 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 843 transitions. [2021-08-21 12:17:32,348 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) [2021-08-21 12:17:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 843 transitions. [2021-08-21 12:17:32,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:32,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:32,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:32,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-21 12:17:32,348 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:32,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash -663532779, now seen corresponding path program 30 times [2021-08-21 12:17:32,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:32,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029249173] [2021-08-21 12:17:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:32,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:32,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:32,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029249173] [2021-08-21 12:17:32,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029249173] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:32,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:32,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:32,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732140976] [2021-08-21 12:17:32,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:32,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:32,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:32,410 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) [2021-08-21 12:17:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:32,556 INFO L93 Difference]: Finished difference Result 555 states and 1597 transitions. [2021-08-21 12:17:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:32,556 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 [2021-08-21 12:17:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:32,557 INFO L225 Difference]: With dead ends: 555 [2021-08-21 12:17:32,557 INFO L226 Difference]: Without dead ends: 555 [2021-08-21 12:17:32,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-08-21 12:17:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 281. [2021-08-21 12:17:32,561 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) [2021-08-21 12:17:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 874 transitions. [2021-08-21 12:17:32,562 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 874 transitions. Word has length 18 [2021-08-21 12:17:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:32,562 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 874 transitions. [2021-08-21 12:17:32,562 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) [2021-08-21 12:17:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 874 transitions. [2021-08-21 12:17:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:32,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:32,562 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:32,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-08-21 12:17:32,563 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:32,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:32,563 INFO L82 PathProgramCache]: Analyzing trace with hash 218544655, now seen corresponding path program 31 times [2021-08-21 12:17:32,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:32,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061908526] [2021-08-21 12:17:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:32,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:32,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:32,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061908526] [2021-08-21 12:17:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061908526] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:32,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:32,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:32,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497059998] [2021-08-21 12:17:32,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:32,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:32,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:32,625 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) [2021-08-21 12:17:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:32,779 INFO L93 Difference]: Finished difference Result 541 states and 1546 transitions. [2021-08-21 12:17:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:32,779 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 [2021-08-21 12:17:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:32,780 INFO L225 Difference]: With dead ends: 541 [2021-08-21 12:17:32,780 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 12:17:32,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 12:17:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 275. [2021-08-21 12:17:32,784 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) [2021-08-21 12:17:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 849 transitions. [2021-08-21 12:17:32,785 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 849 transitions. Word has length 18 [2021-08-21 12:17:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:32,785 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 849 transitions. [2021-08-21 12:17:32,785 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) [2021-08-21 12:17:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 849 transitions. [2021-08-21 12:17:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:32,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:32,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:32,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-21 12:17:32,786 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash 77364555, now seen corresponding path program 32 times [2021-08-21 12:17:32,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:32,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754155075] [2021-08-21 12:17:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:32,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:32,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:32,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754155075] [2021-08-21 12:17:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754155075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:32,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30162735] [2021-08-21 12:17:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:32,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:32,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:32,849 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:32,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:17:33,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:33,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:33,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:33,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30162735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:33,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:33,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:17:33,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106604677] [2021-08-21 12:17:33,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:17:33,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:17:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:33,397 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) [2021-08-21 12:17:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:33,539 INFO L93 Difference]: Finished difference Result 566 states and 1635 transitions. [2021-08-21 12:17:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:33,539 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 [2021-08-21 12:17:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:33,540 INFO L225 Difference]: With dead ends: 566 [2021-08-21 12:17:33,540 INFO L226 Difference]: Without dead ends: 566 [2021-08-21 12:17:33,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-21 12:17:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 278. [2021-08-21 12:17:33,544 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) [2021-08-21 12:17:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 864 transitions. [2021-08-21 12:17:33,545 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 864 transitions. Word has length 18 [2021-08-21 12:17:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:33,545 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 864 transitions. [2021-08-21 12:17:33,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 864 transitions. [2021-08-21 12:17:33,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:33,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:33,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:33,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:33,746 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 [2021-08-21 12:17:33,746 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:33,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1071740175, now seen corresponding path program 33 times [2021-08-21 12:17:33,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:33,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51066674] [2021-08-21 12:17:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:33,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:33,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:33,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51066674] [2021-08-21 12:17:33,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51066674] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:33,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:33,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:33,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001854135] [2021-08-21 12:17:33,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:33,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:33,810 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) [2021-08-21 12:17:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:33,911 INFO L93 Difference]: Finished difference Result 535 states and 1568 transitions. [2021-08-21 12:17:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:33,912 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 [2021-08-21 12:17:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:33,912 INFO L225 Difference]: With dead ends: 535 [2021-08-21 12:17:33,912 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 12:17:33,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 12:17:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 275. [2021-08-21 12:17:33,916 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) [2021-08-21 12:17:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 849 transitions. [2021-08-21 12:17:33,917 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 849 transitions. Word has length 18 [2021-08-21 12:17:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:33,917 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 849 transitions. [2021-08-21 12:17:33,917 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) [2021-08-21 12:17:33,917 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 849 transitions. [2021-08-21 12:17:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:33,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:33,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:33,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-21 12:17:33,918 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2052193307, now seen corresponding path program 34 times [2021-08-21 12:17:33,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:33,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513491150] [2021-08-21 12:17:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:33,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:33,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:33,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513491150] [2021-08-21 12:17:33,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513491150] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:33,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:33,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:33,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462060151] [2021-08-21 12:17:33,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:33,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:33,981 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) [2021-08-21 12:17:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:34,071 INFO L93 Difference]: Finished difference Result 489 states and 1415 transitions. [2021-08-21 12:17:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:34,071 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 [2021-08-21 12:17:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:34,072 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:17:34,072 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:17:34,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:17:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 279. [2021-08-21 12:17:34,076 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) [2021-08-21 12:17:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 863 transitions. [2021-08-21 12:17:34,076 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 863 transitions. Word has length 18 [2021-08-21 12:17:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:34,077 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 863 transitions. [2021-08-21 12:17:34,077 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) [2021-08-21 12:17:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 863 transitions. [2021-08-21 12:17:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:34,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:34,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:34,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-21 12:17:34,077 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:34,078 INFO L82 PathProgramCache]: Analyzing trace with hash 2076093221, now seen corresponding path program 35 times [2021-08-21 12:17:34,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:34,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008192399] [2021-08-21 12:17:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:34,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:34,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:34,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008192399] [2021-08-21 12:17:34,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008192399] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:34,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:34,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:34,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926597672] [2021-08-21 12:17:34,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:34,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:34,137 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) [2021-08-21 12:17:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:34,232 INFO L93 Difference]: Finished difference Result 472 states and 1397 transitions. [2021-08-21 12:17:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:34,232 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 [2021-08-21 12:17:34,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:34,233 INFO L225 Difference]: With dead ends: 472 [2021-08-21 12:17:34,233 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 12:17:34,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 12:17:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 274. [2021-08-21 12:17:34,237 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) [2021-08-21 12:17:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 842 transitions. [2021-08-21 12:17:34,237 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 842 transitions. Word has length 18 [2021-08-21 12:17:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:34,237 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 842 transitions. [2021-08-21 12:17:34,237 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) [2021-08-21 12:17:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 842 transitions. [2021-08-21 12:17:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:34,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:34,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:34,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-21 12:17:34,238 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:34,238 INFO L82 PathProgramCache]: Analyzing trace with hash 836442943, now seen corresponding path program 36 times [2021-08-21 12:17:34,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:34,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068035339] [2021-08-21 12:17:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:34,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:34,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:34,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068035339] [2021-08-21 12:17:34,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068035339] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:34,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:34,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:17:34,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316474379] [2021-08-21 12:17:34,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:17:34,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:17:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:17:34,304 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) [2021-08-21 12:17:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:34,388 INFO L93 Difference]: Finished difference Result 468 states and 1370 transitions. [2021-08-21 12:17:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:34,388 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 [2021-08-21 12:17:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:34,389 INFO L225 Difference]: With dead ends: 468 [2021-08-21 12:17:34,389 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 12:17:34,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 12:17:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 273. [2021-08-21 12:17:34,392 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) [2021-08-21 12:17:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 838 transitions. [2021-08-21 12:17:34,393 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 838 transitions. Word has length 18 [2021-08-21 12:17:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:34,393 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 838 transitions. [2021-08-21 12:17:34,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 838 transitions. [2021-08-21 12:17:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:34,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:34,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:34,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-21 12:17:34,394 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2047601403, now seen corresponding path program 37 times [2021-08-21 12:17:34,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:34,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242858833] [2021-08-21 12:17:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:34,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:34,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:34,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242858833] [2021-08-21 12:17:34,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242858833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:34,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305377626] [2021-08-21 12:17:34,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:34,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:34,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:34,443 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:34,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:17:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:34,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305377626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:34,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:17:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67626332] [2021-08-21 12:17:34,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:17:34,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:34,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:17:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:34,949 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) [2021-08-21 12:17:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:35,066 INFO L93 Difference]: Finished difference Result 472 states and 1362 transitions. [2021-08-21 12:17:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:35,067 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 [2021-08-21 12:17:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:35,067 INFO L225 Difference]: With dead ends: 472 [2021-08-21 12:17:35,068 INFO L226 Difference]: Without dead ends: 472 [2021-08-21 12:17:35,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-21 12:17:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 272. [2021-08-21 12:17:35,076 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) [2021-08-21 12:17:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 833 transitions. [2021-08-21 12:17:35,076 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 833 transitions. Word has length 18 [2021-08-21 12:17:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:35,076 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 833 transitions. [2021-08-21 12:17:35,076 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) [2021-08-21 12:17:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 833 transitions. [2021-08-21 12:17:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:35,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:35,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:35,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:35,288 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 [2021-08-21 12:17:35,289 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:35,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash -973211039, now seen corresponding path program 38 times [2021-08-21 12:17:35,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:35,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113866232] [2021-08-21 12:17:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:35,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:35,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:35,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113866232] [2021-08-21 12:17:35,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113866232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:35,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186764598] [2021-08-21 12:17:35,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:35,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:35,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:35,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:35,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:17:35,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:35,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:35,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:35,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186764598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:35,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:35,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:17:35,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870840193] [2021-08-21 12:17:35,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:17:35,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:17:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:35,859 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) [2021-08-21 12:17:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:35,975 INFO L93 Difference]: Finished difference Result 429 states and 1265 transitions. [2021-08-21 12:17:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:35,975 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 [2021-08-21 12:17:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:35,976 INFO L225 Difference]: With dead ends: 429 [2021-08-21 12:17:35,976 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 12:17:35,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:17:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 12:17:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 255. [2021-08-21 12:17:35,979 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) [2021-08-21 12:17:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 772 transitions. [2021-08-21 12:17:35,980 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 772 transitions. Word has length 18 [2021-08-21 12:17:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:35,980 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 772 transitions. [2021-08-21 12:17:35,980 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) [2021-08-21 12:17:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 772 transitions. [2021-08-21 12:17:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:35,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:35,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:36,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:36,201 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 [2021-08-21 12:17:36,201 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 191422761, now seen corresponding path program 39 times [2021-08-21 12:17:36,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:36,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400183894] [2021-08-21 12:17:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:36,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:36,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:36,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400183894] [2021-08-21 12:17:36,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400183894] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:36,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:36,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:36,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922868862] [2021-08-21 12:17:36,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:36,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:36,260 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) [2021-08-21 12:17:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:36,352 INFO L93 Difference]: Finished difference Result 443 states and 1280 transitions. [2021-08-21 12:17:36,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:36,352 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 [2021-08-21 12:17:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:36,353 INFO L225 Difference]: With dead ends: 443 [2021-08-21 12:17:36,353 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:17:36,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:36,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:17:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-08-21 12:17:36,357 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) [2021-08-21 12:17:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 799 transitions. [2021-08-21 12:17:36,357 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 799 transitions. Word has length 18 [2021-08-21 12:17:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:36,357 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 799 transitions. [2021-08-21 12:17:36,357 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) [2021-08-21 12:17:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 799 transitions. [2021-08-21 12:17:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:36,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:36,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:36,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-08-21 12:17:36,358 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1465577615, now seen corresponding path program 40 times [2021-08-21 12:17:36,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:36,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707789873] [2021-08-21 12:17:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:36,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:36,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:36,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707789873] [2021-08-21 12:17:36,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707789873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:36,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:36,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:36,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419134351] [2021-08-21 12:17:36,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:36,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:36,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:36,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:36,408 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) [2021-08-21 12:17:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:36,509 INFO L93 Difference]: Finished difference Result 449 states and 1295 transitions. [2021-08-21 12:17:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:36,510 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 [2021-08-21 12:17:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:36,510 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:17:36,510 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 12:17:36,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 12:17:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 258. [2021-08-21 12:17:36,514 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) [2021-08-21 12:17:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 784 transitions. [2021-08-21 12:17:36,514 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 784 transitions. Word has length 18 [2021-08-21 12:17:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:36,515 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 784 transitions. [2021-08-21 12:17:36,515 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) [2021-08-21 12:17:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 784 transitions. [2021-08-21 12:17:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:36,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:36,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:36,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-08-21 12:17:36,515 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash 395118011, now seen corresponding path program 41 times [2021-08-21 12:17:36,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:36,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412659720] [2021-08-21 12:17:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:36,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:36,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:36,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412659720] [2021-08-21 12:17:36,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412659720] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:36,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:36,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:36,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205479696] [2021-08-21 12:17:36,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:36,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:36,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:36,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:36,571 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) [2021-08-21 12:17:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:36,662 INFO L93 Difference]: Finished difference Result 407 states and 1188 transitions. [2021-08-21 12:17:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:36,662 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 [2021-08-21 12:17:36,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:36,663 INFO L225 Difference]: With dead ends: 407 [2021-08-21 12:17:36,663 INFO L226 Difference]: Without dead ends: 407 [2021-08-21 12:17:36,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-21 12:17:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 264. [2021-08-21 12:17:36,666 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) [2021-08-21 12:17:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 799 transitions. [2021-08-21 12:17:36,667 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 799 transitions. Word has length 18 [2021-08-21 12:17:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:36,667 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 799 transitions. [2021-08-21 12:17:36,667 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) [2021-08-21 12:17:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 799 transitions. [2021-08-21 12:17:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:36,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:36,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:36,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-08-21 12:17:36,668 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1113307943, now seen corresponding path program 17 times [2021-08-21 12:17:36,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:36,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833254420] [2021-08-21 12:17:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:36,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:36,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:36,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833254420] [2021-08-21 12:17:36,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833254420] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:36,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:36,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:36,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482634388] [2021-08-21 12:17:36,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:36,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:36,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:36,710 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) [2021-08-21 12:17:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:36,771 INFO L93 Difference]: Finished difference Result 401 states and 1136 transitions. [2021-08-21 12:17:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:36,772 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 [2021-08-21 12:17:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:36,772 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:17:36,773 INFO L226 Difference]: Without dead ends: 383 [2021-08-21 12:17:36,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-21 12:17:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 268. [2021-08-21 12:17:36,776 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) [2021-08-21 12:17:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 809 transitions. [2021-08-21 12:17:36,777 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 809 transitions. Word has length 18 [2021-08-21 12:17:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:36,777 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 809 transitions. [2021-08-21 12:17:36,777 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) [2021-08-21 12:17:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 809 transitions. [2021-08-21 12:17:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:36,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:36,777 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:36,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-21 12:17:36,777 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1391576833, now seen corresponding path program 18 times [2021-08-21 12:17:36,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:36,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015315679] [2021-08-21 12:17:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:36,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:36,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:36,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015315679] [2021-08-21 12:17:36,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015315679] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:36,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:36,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:36,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102426099] [2021-08-21 12:17:36,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:36,825 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) [2021-08-21 12:17:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:36,898 INFO L93 Difference]: Finished difference Result 422 states and 1178 transitions. [2021-08-21 12:17:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:36,898 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 [2021-08-21 12:17:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:36,899 INFO L225 Difference]: With dead ends: 422 [2021-08-21 12:17:36,899 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:17:36,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:17:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 279. [2021-08-21 12:17:36,903 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) [2021-08-21 12:17:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 838 transitions. [2021-08-21 12:17:36,904 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 838 transitions. Word has length 18 [2021-08-21 12:17:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:36,904 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 838 transitions. [2021-08-21 12:17:36,904 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) [2021-08-21 12:17:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 838 transitions. [2021-08-21 12:17:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:36,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:36,904 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:36,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-21 12:17:36,905 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:36,905 INFO L82 PathProgramCache]: Analyzing trace with hash -322339367, now seen corresponding path program 19 times [2021-08-21 12:17:36,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:36,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268298133] [2021-08-21 12:17:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:36,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:36,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:36,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268298133] [2021-08-21 12:17:36,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268298133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:36,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:36,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:36,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359851740] [2021-08-21 12:17:36,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:36,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:36,954 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) [2021-08-21 12:17:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,034 INFO L93 Difference]: Finished difference Result 391 states and 1121 transitions. [2021-08-21 12:17:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:37,035 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 [2021-08-21 12:17:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,035 INFO L225 Difference]: With dead ends: 391 [2021-08-21 12:17:37,035 INFO L226 Difference]: Without dead ends: 391 [2021-08-21 12:17:37,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-21 12:17:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 264. [2021-08-21 12:17:37,039 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) [2021-08-21 12:17:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 799 transitions. [2021-08-21 12:17:37,039 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 799 transitions. Word has length 18 [2021-08-21 12:17:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,039 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 799 transitions. [2021-08-21 12:17:37,039 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) [2021-08-21 12:17:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 799 transitions. [2021-08-21 12:17:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:37,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-08-21 12:17:37,040 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1825606179, now seen corresponding path program 20 times [2021-08-21 12:17:37,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410846530] [2021-08-21 12:17:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:37,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:37,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410846530] [2021-08-21 12:17:37,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410846530] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:37,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:37,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:37,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127380562] [2021-08-21 12:17:37,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:37,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:37,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:37,102 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) [2021-08-21 12:17:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,171 INFO L93 Difference]: Finished difference Result 362 states and 1047 transitions. [2021-08-21 12:17:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:37,171 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 [2021-08-21 12:17:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,172 INFO L225 Difference]: With dead ends: 362 [2021-08-21 12:17:37,172 INFO L226 Difference]: Without dead ends: 355 [2021-08-21 12:17:37,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-21 12:17:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 268. [2021-08-21 12:17:37,176 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) [2021-08-21 12:17:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 809 transitions. [2021-08-21 12:17:37,177 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 809 transitions. Word has length 18 [2021-08-21 12:17:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,177 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 809 transitions. [2021-08-21 12:17:37,177 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) [2021-08-21 12:17:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 809 transitions. [2021-08-21 12:17:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:37,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,177 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-21 12:17:37,177 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,178 INFO L82 PathProgramCache]: Analyzing trace with hash -756368713, now seen corresponding path program 21 times [2021-08-21 12:17:37,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781037105] [2021-08-21 12:17:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:37,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:37,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781037105] [2021-08-21 12:17:37,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781037105] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:37,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:37,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:37,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788922335] [2021-08-21 12:17:37,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:37,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:37,239 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) [2021-08-21 12:17:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,317 INFO L93 Difference]: Finished difference Result 361 states and 1052 transitions. [2021-08-21 12:17:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:37,317 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 [2021-08-21 12:17:37,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,318 INFO L225 Difference]: With dead ends: 361 [2021-08-21 12:17:37,318 INFO L226 Difference]: Without dead ends: 361 [2021-08-21 12:17:37,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-08-21 12:17:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 266. [2021-08-21 12:17:37,321 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) [2021-08-21 12:17:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 804 transitions. [2021-08-21 12:17:37,322 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 804 transitions. Word has length 18 [2021-08-21 12:17:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,322 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 804 transitions. [2021-08-21 12:17:37,322 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) [2021-08-21 12:17:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 804 transitions. [2021-08-21 12:17:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:37,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-21 12:17:37,322 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2019559785, now seen corresponding path program 22 times [2021-08-21 12:17:37,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782517452] [2021-08-21 12:17:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:37,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:37,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782517452] [2021-08-21 12:17:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782517452] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:37,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:37,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:37,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593471243] [2021-08-21 12:17:37,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:37,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:37,364 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) [2021-08-21 12:17:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,434 INFO L93 Difference]: Finished difference Result 401 states and 1146 transitions. [2021-08-21 12:17:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:37,434 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 [2021-08-21 12:17:37,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,435 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:17:37,435 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 12:17:37,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 12:17:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 268. [2021-08-21 12:17:37,438 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) [2021-08-21 12:17:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 811 transitions. [2021-08-21 12:17:37,439 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 811 transitions. Word has length 18 [2021-08-21 12:17:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,439 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 811 transitions. [2021-08-21 12:17:37,439 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) [2021-08-21 12:17:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 811 transitions. [2021-08-21 12:17:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:37,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-21 12:17:37,440 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1934189573, now seen corresponding path program 42 times [2021-08-21 12:17:37,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091594003] [2021-08-21 12:17:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:37,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:37,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091594003] [2021-08-21 12:17:37,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091594003] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:37,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:37,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:37,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450557496] [2021-08-21 12:17:37,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:37,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:37,504 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) [2021-08-21 12:17:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,603 INFO L93 Difference]: Finished difference Result 489 states and 1427 transitions. [2021-08-21 12:17:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:37,603 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 [2021-08-21 12:17:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,604 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:17:37,604 INFO L226 Difference]: Without dead ends: 489 [2021-08-21 12:17:37,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-21 12:17:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 278. [2021-08-21 12:17:37,609 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) [2021-08-21 12:17:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 861 transitions. [2021-08-21 12:17:37,609 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 861 transitions. Word has length 18 [2021-08-21 12:17:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,609 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 861 transitions. [2021-08-21 12:17:37,609 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) [2021-08-21 12:17:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 861 transitions. [2021-08-21 12:17:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:37,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-21 12:17:37,610 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash -651603781, now seen corresponding path program 23 times [2021-08-21 12:17:37,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327011932] [2021-08-21 12:17:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:37,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:37,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327011932] [2021-08-21 12:17:37,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327011932] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:37,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:37,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:37,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817832141] [2021-08-21 12:17:37,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:37,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:37,676 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) [2021-08-21 12:17:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,778 INFO L93 Difference]: Finished difference Result 552 states and 1579 transitions. [2021-08-21 12:17:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:37,779 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 [2021-08-21 12:17:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,779 INFO L225 Difference]: With dead ends: 552 [2021-08-21 12:17:37,779 INFO L226 Difference]: Without dead ends: 545 [2021-08-21 12:17:37,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-21 12:17:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 290. [2021-08-21 12:17:37,784 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) [2021-08-21 12:17:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 898 transitions. [2021-08-21 12:17:37,784 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 898 transitions. Word has length 18 [2021-08-21 12:17:37,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,784 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 898 transitions. [2021-08-21 12:17:37,784 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) [2021-08-21 12:17:37,784 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 898 transitions. [2021-08-21 12:17:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:37,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-08-21 12:17:37,785 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1000660983, now seen corresponding path program 24 times [2021-08-21 12:17:37,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459042397] [2021-08-21 12:17:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:37,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:37,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459042397] [2021-08-21 12:17:37,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459042397] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:37,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:37,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:37,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969553538] [2021-08-21 12:17:37,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:37,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:37,851 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) [2021-08-21 12:17:37,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:37,951 INFO L93 Difference]: Finished difference Result 561 states and 1614 transitions. [2021-08-21 12:17:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:37,951 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 [2021-08-21 12:17:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:37,952 INFO L225 Difference]: With dead ends: 561 [2021-08-21 12:17:37,952 INFO L226 Difference]: Without dead ends: 561 [2021-08-21 12:17:37,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-21 12:17:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 290. [2021-08-21 12:17:37,958 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) [2021-08-21 12:17:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 898 transitions. [2021-08-21 12:17:37,959 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 898 transitions. Word has length 18 [2021-08-21 12:17:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:37,959 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 898 transitions. [2021-08-21 12:17:37,959 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) [2021-08-21 12:17:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 898 transitions. [2021-08-21 12:17:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:37,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:37,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:37,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-08-21 12:17:37,960 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:37,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1478700289, now seen corresponding path program 43 times [2021-08-21 12:17:37,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:37,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356504573] [2021-08-21 12:17:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:37,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:38,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:38,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356504573] [2021-08-21 12:17:38,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356504573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:38,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:38,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:38,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721543603] [2021-08-21 12:17:38,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:38,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:38,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:38,020 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) [2021-08-21 12:17:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:38,107 INFO L93 Difference]: Finished difference Result 487 states and 1413 transitions. [2021-08-21 12:17:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:38,117 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 [2021-08-21 12:17:38,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:38,118 INFO L225 Difference]: With dead ends: 487 [2021-08-21 12:17:38,118 INFO L226 Difference]: Without dead ends: 481 [2021-08-21 12:17:38,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:38,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-21 12:17:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 293. [2021-08-21 12:17:38,121 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) [2021-08-21 12:17:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 900 transitions. [2021-08-21 12:17:38,122 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 900 transitions. Word has length 18 [2021-08-21 12:17:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:38,122 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 900 transitions. [2021-08-21 12:17:38,122 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) [2021-08-21 12:17:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 900 transitions. [2021-08-21 12:17:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:38,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:38,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:38,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-08-21 12:17:38,123 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1619880389, now seen corresponding path program 44 times [2021-08-21 12:17:38,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:38,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216419461] [2021-08-21 12:17:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:38,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:38,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:38,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216419461] [2021-08-21 12:17:38,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216419461] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:38,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:38,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:38,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698884937] [2021-08-21 12:17:38,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:38,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:38,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:38,189 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) [2021-08-21 12:17:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:38,312 INFO L93 Difference]: Finished difference Result 558 states and 1611 transitions. [2021-08-21 12:17:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:38,312 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 [2021-08-21 12:17:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:38,313 INFO L225 Difference]: With dead ends: 558 [2021-08-21 12:17:38,313 INFO L226 Difference]: Without dead ends: 558 [2021-08-21 12:17:38,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-08-21 12:17:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 296. [2021-08-21 12:17:38,317 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) [2021-08-21 12:17:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 915 transitions. [2021-08-21 12:17:38,318 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 915 transitions. Word has length 18 [2021-08-21 12:17:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:38,318 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 915 transitions. [2021-08-21 12:17:38,318 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) [2021-08-21 12:17:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 915 transitions. [2021-08-21 12:17:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:38,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:38,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:38,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-08-21 12:17:38,318 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash -625504769, now seen corresponding path program 45 times [2021-08-21 12:17:38,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:38,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033023286] [2021-08-21 12:17:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:38,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:38,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:38,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033023286] [2021-08-21 12:17:38,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033023286] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:38,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:38,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:38,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262084339] [2021-08-21 12:17:38,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:38,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:38,384 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) [2021-08-21 12:17:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:38,520 INFO L93 Difference]: Finished difference Result 527 states and 1544 transitions. [2021-08-21 12:17:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:38,520 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 [2021-08-21 12:17:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:38,521 INFO L225 Difference]: With dead ends: 527 [2021-08-21 12:17:38,521 INFO L226 Difference]: Without dead ends: 527 [2021-08-21 12:17:38,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-21 12:17:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 293. [2021-08-21 12:17:38,525 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) [2021-08-21 12:17:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 900 transitions. [2021-08-21 12:17:38,525 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 900 transitions. Word has length 18 [2021-08-21 12:17:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:38,526 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 900 transitions. [2021-08-21 12:17:38,526 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) [2021-08-21 12:17:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 900 transitions. [2021-08-21 12:17:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:38,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:38,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:38,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-08-21 12:17:38,526 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2025830735, now seen corresponding path program 25 times [2021-08-21 12:17:38,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:38,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948574618] [2021-08-21 12:17:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:38,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:38,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:38,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948574618] [2021-08-21 12:17:38,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948574618] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:38,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:38,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:38,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543041398] [2021-08-21 12:17:38,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:38,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:38,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:38,592 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) [2021-08-21 12:17:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:38,701 INFO L93 Difference]: Finished difference Result 593 states and 1666 transitions. [2021-08-21 12:17:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:38,702 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 [2021-08-21 12:17:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:38,703 INFO L225 Difference]: With dead ends: 593 [2021-08-21 12:17:38,703 INFO L226 Difference]: Without dead ends: 586 [2021-08-21 12:17:38,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-21 12:17:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 297. [2021-08-21 12:17:38,707 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) [2021-08-21 12:17:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 914 transitions. [2021-08-21 12:17:38,707 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 914 transitions. Word has length 18 [2021-08-21 12:17:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:38,707 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 914 transitions. [2021-08-21 12:17:38,707 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) [2021-08-21 12:17:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 914 transitions. [2021-08-21 12:17:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:38,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:38,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:38,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-08-21 12:17:38,708 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash 334412023, now seen corresponding path program 26 times [2021-08-21 12:17:38,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:38,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275967275] [2021-08-21 12:17:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:38,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:38,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:38,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275967275] [2021-08-21 12:17:38,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275967275] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:38,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:38,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:38,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747267579] [2021-08-21 12:17:38,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:38,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:38,785 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) [2021-08-21 12:17:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:38,936 INFO L93 Difference]: Finished difference Result 498 states and 1420 transitions. [2021-08-21 12:17:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:38,936 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 [2021-08-21 12:17:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:38,937 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:17:38,937 INFO L226 Difference]: Without dead ends: 498 [2021-08-21 12:17:38,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-21 12:17:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 295. [2021-08-21 12:17:38,941 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) [2021-08-21 12:17:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-08-21 12:17:38,941 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-08-21 12:17:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:38,941 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-08-21 12:17:38,941 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) [2021-08-21 12:17:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-08-21 12:17:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:38,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:38,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:38,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-21 12:17:38,942 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:38,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1103549513, now seen corresponding path program 27 times [2021-08-21 12:17:38,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:38,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403431121] [2021-08-21 12:17:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:38,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:39,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:39,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403431121] [2021-08-21 12:17:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403431121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:39,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:39,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:39,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826480084] [2021-08-21 12:17:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:39,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:39,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:39,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:39,017 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) [2021-08-21 12:17:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:39,159 INFO L93 Difference]: Finished difference Result 529 states and 1512 transitions. [2021-08-21 12:17:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:39,159 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 [2021-08-21 12:17:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:39,160 INFO L225 Difference]: With dead ends: 529 [2021-08-21 12:17:39,160 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 12:17:39,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 12:17:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 298. [2021-08-21 12:17:39,164 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) [2021-08-21 12:17:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-08-21 12:17:39,165 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-08-21 12:17:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:39,165 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-08-21 12:17:39,165 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) [2021-08-21 12:17:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-08-21 12:17:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:39,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:39,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:39,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-21 12:17:39,166 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:39,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash -324443997, now seen corresponding path program 28 times [2021-08-21 12:17:39,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:39,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100876660] [2021-08-21 12:17:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:39,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:39,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:39,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100876660] [2021-08-21 12:17:39,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100876660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:39,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:39,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:39,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884666273] [2021-08-21 12:17:39,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:39,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:39,257 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) [2021-08-21 12:17:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:39,366 INFO L93 Difference]: Finished difference Result 484 states and 1407 transitions. [2021-08-21 12:17:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:39,366 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 [2021-08-21 12:17:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:39,367 INFO L225 Difference]: With dead ends: 484 [2021-08-21 12:17:39,367 INFO L226 Difference]: Without dead ends: 484 [2021-08-21 12:17:39,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-21 12:17:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 295. [2021-08-21 12:17:39,371 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) [2021-08-21 12:17:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-08-21 12:17:39,372 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-08-21 12:17:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:39,372 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-08-21 12:17:39,372 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) [2021-08-21 12:17:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-08-21 12:17:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:39,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:39,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:39,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-08-21 12:17:39,373 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:39,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:39,374 INFO L82 PathProgramCache]: Analyzing trace with hash 354948363, now seen corresponding path program 46 times [2021-08-21 12:17:39,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:39,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705590738] [2021-08-21 12:17:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:39,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:39,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:39,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705590738] [2021-08-21 12:17:39,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705590738] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:39,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:39,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:39,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557960563] [2021-08-21 12:17:39,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:39,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:39,434 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) [2021-08-21 12:17:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:39,551 INFO L93 Difference]: Finished difference Result 526 states and 1501 transitions. [2021-08-21 12:17:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:39,551 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 [2021-08-21 12:17:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:39,552 INFO L225 Difference]: With dead ends: 526 [2021-08-21 12:17:39,552 INFO L226 Difference]: Without dead ends: 520 [2021-08-21 12:17:39,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-21 12:17:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 299. [2021-08-21 12:17:39,556 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) [2021-08-21 12:17:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 923 transitions. [2021-08-21 12:17:39,556 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 923 transitions. Word has length 18 [2021-08-21 12:17:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:39,556 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 923 transitions. [2021-08-21 12:17:39,556 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) [2021-08-21 12:17:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 923 transitions. [2021-08-21 12:17:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:39,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:39,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:39,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-08-21 12:17:39,557 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash 378848277, now seen corresponding path program 47 times [2021-08-21 12:17:39,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:39,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026416922] [2021-08-21 12:17:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:39,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:39,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:39,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026416922] [2021-08-21 12:17:39,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026416922] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:39,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:39,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:39,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571670486] [2021-08-21 12:17:39,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:39,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:39,614 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) [2021-08-21 12:17:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:39,754 INFO L93 Difference]: Finished difference Result 509 states and 1483 transitions. [2021-08-21 12:17:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:39,754 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 [2021-08-21 12:17:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:39,755 INFO L225 Difference]: With dead ends: 509 [2021-08-21 12:17:39,755 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:17:39,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:17:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 296. [2021-08-21 12:17:39,759 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) [2021-08-21 12:17:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 912 transitions. [2021-08-21 12:17:39,760 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 912 transitions. Word has length 18 [2021-08-21 12:17:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 912 transitions. [2021-08-21 12:17:39,760 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) [2021-08-21 12:17:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 912 transitions. [2021-08-21 12:17:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:39,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:39,761 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:39,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-08-21 12:17:39,761 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 562658277, now seen corresponding path program 48 times [2021-08-21 12:17:39,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:39,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019665464] [2021-08-21 12:17:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:39,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:39,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:39,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019665464] [2021-08-21 12:17:39,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019665464] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:39,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:39,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:39,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866616521] [2021-08-21 12:17:39,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:39,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:39,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:39,821 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) [2021-08-21 12:17:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:39,927 INFO L93 Difference]: Finished difference Result 522 states and 1539 transitions. [2021-08-21 12:17:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:39,927 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 [2021-08-21 12:17:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:39,928 INFO L225 Difference]: With dead ends: 522 [2021-08-21 12:17:39,928 INFO L226 Difference]: Without dead ends: 522 [2021-08-21 12:17:39,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-21 12:17:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 297. [2021-08-21 12:17:39,932 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) [2021-08-21 12:17:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 914 transitions. [2021-08-21 12:17:39,932 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 914 transitions. Word has length 18 [2021-08-21 12:17:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:39,932 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 914 transitions. [2021-08-21 12:17:39,932 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) [2021-08-21 12:17:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 914 transitions. [2021-08-21 12:17:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:39,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:39,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:39,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-08-21 12:17:39,933 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1557033897, now seen corresponding path program 49 times [2021-08-21 12:17:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:39,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972038027] [2021-08-21 12:17:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:39,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:39,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972038027] [2021-08-21 12:17:39,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972038027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126431629] [2021-08-21 12:17:39,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:39,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:39,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:39,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:39,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:17:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:40,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:40,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126431629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:40,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:40,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:17:40,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281286794] [2021-08-21 12:17:40,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:17:40,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:17:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:40,589 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) [2021-08-21 12:17:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:40,716 INFO L93 Difference]: Finished difference Result 516 states and 1521 transitions. [2021-08-21 12:17:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:40,717 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 [2021-08-21 12:17:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:40,718 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:17:40,718 INFO L226 Difference]: Without dead ends: 516 [2021-08-21 12:17:40,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:17:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-21 12:17:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 286. [2021-08-21 12:17:40,721 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) [2021-08-21 12:17:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 877 transitions. [2021-08-21 12:17:40,722 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 877 transitions. Word has length 18 [2021-08-21 12:17:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:40,722 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 877 transitions. [2021-08-21 12:17:40,722 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) [2021-08-21 12:17:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 877 transitions. [2021-08-21 12:17:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:40,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:40,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:40,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:40,923 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 [2021-08-21 12:17:40,923 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:40,923 INFO L82 PathProgramCache]: Analyzing trace with hash 839713783, now seen corresponding path program 50 times [2021-08-21 12:17:40,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:40,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144426322] [2021-08-21 12:17:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:40,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:40,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:40,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144426322] [2021-08-21 12:17:40,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144426322] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:40,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:40,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:40,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936127416] [2021-08-21 12:17:40,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:40,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:40,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:40,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:40,978 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) [2021-08-21 12:17:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:41,093 INFO L93 Difference]: Finished difference Result 512 states and 1495 transitions. [2021-08-21 12:17:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:41,093 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 [2021-08-21 12:17:41,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:41,094 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:17:41,094 INFO L226 Difference]: Without dead ends: 512 [2021-08-21 12:17:41,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-21 12:17:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 283. [2021-08-21 12:17:41,098 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) [2021-08-21 12:17:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 865 transitions. [2021-08-21 12:17:41,098 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 865 transitions. Word has length 18 [2021-08-21 12:17:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:41,098 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 865 transitions. [2021-08-21 12:17:41,098 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) [2021-08-21 12:17:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 865 transitions. [2021-08-21 12:17:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:41,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:41,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:41,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-21 12:17:41,099 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash -509083621, now seen corresponding path program 29 times [2021-08-21 12:17:41,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:41,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134806691] [2021-08-21 12:17:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:41,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:41,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:41,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134806691] [2021-08-21 12:17:41,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134806691] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:41,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:41,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:41,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895349118] [2021-08-21 12:17:41,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:41,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:41,151 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) [2021-08-21 12:17:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:41,241 INFO L93 Difference]: Finished difference Result 544 states and 1538 transitions. [2021-08-21 12:17:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:41,241 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 [2021-08-21 12:17:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:41,242 INFO L225 Difference]: With dead ends: 544 [2021-08-21 12:17:41,242 INFO L226 Difference]: Without dead ends: 537 [2021-08-21 12:17:41,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-21 12:17:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 289. [2021-08-21 12:17:41,246 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) [2021-08-21 12:17:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 882 transitions. [2021-08-21 12:17:41,247 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 882 transitions. Word has length 18 [2021-08-21 12:17:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:41,247 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 882 transitions. [2021-08-21 12:17:41,247 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) [2021-08-21 12:17:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 882 transitions. [2021-08-21 12:17:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:41,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:41,247 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:41,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-08-21 12:17:41,247 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2094464963, now seen corresponding path program 30 times [2021-08-21 12:17:41,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:41,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573341510] [2021-08-21 12:17:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:41,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:41,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:41,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573341510] [2021-08-21 12:17:41,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573341510] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:41,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:41,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:41,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652460652] [2021-08-21 12:17:41,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:41,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:41,327 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) [2021-08-21 12:17:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:41,453 INFO L93 Difference]: Finished difference Result 495 states and 1406 transitions. [2021-08-21 12:17:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:41,454 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 [2021-08-21 12:17:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:41,455 INFO L225 Difference]: With dead ends: 495 [2021-08-21 12:17:41,455 INFO L226 Difference]: Without dead ends: 495 [2021-08-21 12:17:41,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:17:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-21 12:17:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 287. [2021-08-21 12:17:41,458 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) [2021-08-21 12:17:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 877 transitions. [2021-08-21 12:17:41,459 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 877 transitions. Word has length 18 [2021-08-21 12:17:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:41,459 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 877 transitions. [2021-08-21 12:17:41,460 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) [2021-08-21 12:17:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 877 transitions. [2021-08-21 12:17:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:41,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:41,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:41,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-08-21 12:17:41,460 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:41,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1172762823, now seen corresponding path program 31 times [2021-08-21 12:17:41,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:41,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594321512] [2021-08-21 12:17:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:41,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:41,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:41,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594321512] [2021-08-21 12:17:41,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594321512] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:41,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:41,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:41,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398383855] [2021-08-21 12:17:41,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:41,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:41,521 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) [2021-08-21 12:17:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:41,625 INFO L93 Difference]: Finished difference Result 498 states and 1414 transitions. [2021-08-21 12:17:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:17:41,625 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 [2021-08-21 12:17:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:41,626 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:17:41,626 INFO L226 Difference]: Without dead ends: 498 [2021-08-21 12:17:41,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-21 12:17:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 285. [2021-08-21 12:17:41,629 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) [2021-08-21 12:17:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 872 transitions. [2021-08-21 12:17:41,630 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 872 transitions. Word has length 18 [2021-08-21 12:17:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:41,630 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 872 transitions. [2021-08-21 12:17:41,630 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) [2021-08-21 12:17:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 872 transitions. [2021-08-21 12:17:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:41,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:41,631 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:41,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-21 12:17:41,631 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash -610953751, now seen corresponding path program 32 times [2021-08-21 12:17:41,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:41,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585610505] [2021-08-21 12:17:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:41,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:41,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:41,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585610505] [2021-08-21 12:17:41,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585610505] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:41,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:41,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:41,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455015231] [2021-08-21 12:17:41,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:41,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:41,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:41,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:41,698 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) [2021-08-21 12:17:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:41,822 INFO L93 Difference]: Finished difference Result 506 states and 1454 transitions. [2021-08-21 12:17:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:41,822 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 [2021-08-21 12:17:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:41,823 INFO L225 Difference]: With dead ends: 506 [2021-08-21 12:17:41,823 INFO L226 Difference]: Without dead ends: 506 [2021-08-21 12:17:41,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-21 12:17:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 286. [2021-08-21 12:17:41,827 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) [2021-08-21 12:17:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 874 transitions. [2021-08-21 12:17:41,827 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 874 transitions. Word has length 18 [2021-08-21 12:17:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:41,827 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 874 transitions. [2021-08-21 12:17:41,827 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) [2021-08-21 12:17:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 874 transitions. [2021-08-21 12:17:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:41,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:41,828 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:41,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-21 12:17:41,828 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:41,828 INFO L82 PathProgramCache]: Analyzing trace with hash 168151765, now seen corresponding path program 33 times [2021-08-21 12:17:41,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:41,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196315366] [2021-08-21 12:17:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:41,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:41,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:41,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196315366] [2021-08-21 12:17:41,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196315366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:41,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:41,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:41,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919077403] [2021-08-21 12:17:41,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:41,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:41,889 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) [2021-08-21 12:17:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:42,008 INFO L93 Difference]: Finished difference Result 503 states and 1445 transitions. [2021-08-21 12:17:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:42,008 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 [2021-08-21 12:17:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:42,009 INFO L225 Difference]: With dead ends: 503 [2021-08-21 12:17:42,009 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 12:17:42,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 12:17:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 283. [2021-08-21 12:17:42,013 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) [2021-08-21 12:17:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 859 transitions. [2021-08-21 12:17:42,013 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 859 transitions. Word has length 18 [2021-08-21 12:17:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:42,013 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 859 transitions. [2021-08-21 12:17:42,013 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) [2021-08-21 12:17:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 859 transitions. [2021-08-21 12:17:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:42,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:42,014 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:42,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-08-21 12:17:42,014 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:42,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1160545655, now seen corresponding path program 34 times [2021-08-21 12:17:42,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:42,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702905812] [2021-08-21 12:17:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:42,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:42,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:42,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702905812] [2021-08-21 12:17:42,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702905812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:42,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:42,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:42,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374903721] [2021-08-21 12:17:42,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:42,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:42,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:42,089 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) [2021-08-21 12:17:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:42,207 INFO L93 Difference]: Finished difference Result 491 states and 1413 transitions. [2021-08-21 12:17:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:42,209 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 [2021-08-21 12:17:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:42,209 INFO L225 Difference]: With dead ends: 491 [2021-08-21 12:17:42,209 INFO L226 Difference]: Without dead ends: 491 [2021-08-21 12:17:42,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-21 12:17:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 272. [2021-08-21 12:17:42,213 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) [2021-08-21 12:17:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 828 transitions. [2021-08-21 12:17:42,213 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 828 transitions. Word has length 18 [2021-08-21 12:17:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:42,213 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 828 transitions. [2021-08-21 12:17:42,214 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) [2021-08-21 12:17:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 828 transitions. [2021-08-21 12:17:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:42,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:42,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:42,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-08-21 12:17:42,214 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:42,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:42,214 INFO L82 PathProgramCache]: Analyzing trace with hash 425058399, now seen corresponding path program 51 times [2021-08-21 12:17:42,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:42,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667837117] [2021-08-21 12:17:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:42,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:42,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:42,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667837117] [2021-08-21 12:17:42,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667837117] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:42,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:42,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:42,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33162393] [2021-08-21 12:17:42,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:42,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:42,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:42,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:42,262 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) [2021-08-21 12:17:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:42,374 INFO L93 Difference]: Finished difference Result 410 states and 1189 transitions. [2021-08-21 12:17:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:42,374 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 [2021-08-21 12:17:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:42,375 INFO L225 Difference]: With dead ends: 410 [2021-08-21 12:17:42,375 INFO L226 Difference]: Without dead ends: 404 [2021-08-21 12:17:42,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:42,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-21 12:17:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 286. [2021-08-21 12:17:42,378 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) [2021-08-21 12:17:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 867 transitions. [2021-08-21 12:17:42,379 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 867 transitions. Word has length 18 [2021-08-21 12:17:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:42,379 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 867 transitions. [2021-08-21 12:17:42,379 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) [2021-08-21 12:17:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 867 transitions. [2021-08-21 12:17:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:42,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:42,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:42,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-21 12:17:42,379 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:42,380 INFO L82 PathProgramCache]: Analyzing trace with hash 448958313, now seen corresponding path program 52 times [2021-08-21 12:17:42,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:42,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116300913] [2021-08-21 12:17:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:42,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:42,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:42,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116300913] [2021-08-21 12:17:42,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116300913] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:42,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:42,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:42,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381627429] [2021-08-21 12:17:42,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:42,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:42,428 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) [2021-08-21 12:17:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:42,555 INFO L93 Difference]: Finished difference Result 416 states and 1210 transitions. [2021-08-21 12:17:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:42,555 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 [2021-08-21 12:17:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:42,556 INFO L225 Difference]: With dead ends: 416 [2021-08-21 12:17:42,556 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 12:17:42,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 12:17:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 284. [2021-08-21 12:17:42,559 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) [2021-08-21 12:17:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 862 transitions. [2021-08-21 12:17:42,560 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 862 transitions. Word has length 18 [2021-08-21 12:17:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:42,560 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 862 transitions. [2021-08-21 12:17:42,560 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) [2021-08-21 12:17:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 862 transitions. [2021-08-21 12:17:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:42,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:42,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:42,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-21 12:17:42,560 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1489194111, now seen corresponding path program 53 times [2021-08-21 12:17:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:42,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230414627] [2021-08-21 12:17:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:42,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:42,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:42,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230414627] [2021-08-21 12:17:42,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230414627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:42,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:42,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:42,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452212589] [2021-08-21 12:17:42,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:42,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:42,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:42,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:42,614 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) [2021-08-21 12:17:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:42,729 INFO L93 Difference]: Finished difference Result 420 states and 1226 transitions. [2021-08-21 12:17:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:42,730 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 [2021-08-21 12:17:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:42,730 INFO L225 Difference]: With dead ends: 420 [2021-08-21 12:17:42,730 INFO L226 Difference]: Without dead ends: 420 [2021-08-21 12:17:42,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-21 12:17:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 274. [2021-08-21 12:17:42,734 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) [2021-08-21 12:17:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 833 transitions. [2021-08-21 12:17:42,734 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 833 transitions. Word has length 18 [2021-08-21 12:17:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:42,734 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 833 transitions. [2021-08-21 12:17:42,734 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) [2021-08-21 12:17:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 833 transitions. [2021-08-21 12:17:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:42,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:42,735 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:42,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-08-21 12:17:42,735 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:42,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1930344541, now seen corresponding path program 35 times [2021-08-21 12:17:42,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:42,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256118837] [2021-08-21 12:17:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:42,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:42,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:42,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256118837] [2021-08-21 12:17:42,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256118837] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:42,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:42,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:42,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591382166] [2021-08-21 12:17:42,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:42,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:42,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:42,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:42,804 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) [2021-08-21 12:17:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:42,904 INFO L93 Difference]: Finished difference Result 405 states and 1206 transitions. [2021-08-21 12:17:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:17:42,904 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 [2021-08-21 12:17:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:42,905 INFO L225 Difference]: With dead ends: 405 [2021-08-21 12:17:42,905 INFO L226 Difference]: Without dead ends: 398 [2021-08-21 12:17:42,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-21 12:17:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 277. [2021-08-21 12:17:42,908 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) [2021-08-21 12:17:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 841 transitions. [2021-08-21 12:17:42,909 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 841 transitions. Word has length 18 [2021-08-21 12:17:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:42,909 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 841 transitions. [2021-08-21 12:17:42,909 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) [2021-08-21 12:17:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 841 transitions. [2021-08-21 12:17:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:42,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:42,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:42,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-08-21 12:17:42,910 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2015565553, now seen corresponding path program 36 times [2021-08-21 12:17:42,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:42,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957458707] [2021-08-21 12:17:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:42,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:42,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:42,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957458707] [2021-08-21 12:17:42,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957458707] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:42,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:42,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:42,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58977003] [2021-08-21 12:17:42,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:42,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:42,978 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) [2021-08-21 12:17:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:43,086 INFO L93 Difference]: Finished difference Result 407 states and 1219 transitions. [2021-08-21 12:17:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:43,087 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 [2021-08-21 12:17:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:43,087 INFO L225 Difference]: With dead ends: 407 [2021-08-21 12:17:43,088 INFO L226 Difference]: Without dead ends: 407 [2021-08-21 12:17:43,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-21 12:17:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 274. [2021-08-21 12:17:43,091 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) [2021-08-21 12:17:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 833 transitions. [2021-08-21 12:17:43,091 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 833 transitions. Word has length 18 [2021-08-21 12:17:43,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:43,092 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 833 transitions. [2021-08-21 12:17:43,092 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) [2021-08-21 12:17:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 833 transitions. [2021-08-21 12:17:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:43,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:43,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:43,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-08-21 12:17:43,092 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1480335751, now seen corresponding path program 37 times [2021-08-21 12:17:43,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:43,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7535040] [2021-08-21 12:17:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:43,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:43,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:43,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7535040] [2021-08-21 12:17:43,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7535040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:43,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:43,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:43,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992933652] [2021-08-21 12:17:43,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:43,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:43,154 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) [2021-08-21 12:17:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:43,247 INFO L93 Difference]: Finished difference Result 443 states and 1310 transitions. [2021-08-21 12:17:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:43,248 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 [2021-08-21 12:17:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:43,248 INFO L225 Difference]: With dead ends: 443 [2021-08-21 12:17:43,248 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:17:43,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:17:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 271. [2021-08-21 12:17:43,252 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) [2021-08-21 12:17:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 825 transitions. [2021-08-21 12:17:43,252 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 825 transitions. Word has length 18 [2021-08-21 12:17:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:43,252 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 825 transitions. [2021-08-21 12:17:43,252 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) [2021-08-21 12:17:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 825 transitions. [2021-08-21 12:17:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:43,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:43,253 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:43,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-08-21 12:17:43,253 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2049648107, now seen corresponding path program 54 times [2021-08-21 12:17:43,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:43,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172117075] [2021-08-21 12:17:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:43,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:43,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:43,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172117075] [2021-08-21 12:17:43,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172117075] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:43,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:43,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:43,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687914545] [2021-08-21 12:17:43,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:43,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:43,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:43,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:43,323 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) [2021-08-21 12:17:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:43,426 INFO L93 Difference]: Finished difference Result 537 states and 1547 transitions. [2021-08-21 12:17:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:43,427 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 [2021-08-21 12:17:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:43,428 INFO L225 Difference]: With dead ends: 537 [2021-08-21 12:17:43,428 INFO L226 Difference]: Without dead ends: 537 [2021-08-21 12:17:43,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-21 12:17:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 279. [2021-08-21 12:17:43,432 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) [2021-08-21 12:17:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 865 transitions. [2021-08-21 12:17:43,433 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 865 transitions. Word has length 18 [2021-08-21 12:17:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:43,433 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 865 transitions. [2021-08-21 12:17:43,433 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) [2021-08-21 12:17:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 865 transitions. [2021-08-21 12:17:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:43,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:43,433 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-08-21 12:17:43,434 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash -340474165, now seen corresponding path program 38 times [2021-08-21 12:17:43,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:43,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360011083] [2021-08-21 12:17:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:43,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:43,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:43,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360011083] [2021-08-21 12:17:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360011083] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:43,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:43,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:43,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116536443] [2021-08-21 12:17:43,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:43,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:43,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:43,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:43,492 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) [2021-08-21 12:17:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:43,591 INFO L93 Difference]: Finished difference Result 529 states and 1531 transitions. [2021-08-21 12:17:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:43,591 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 [2021-08-21 12:17:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:43,593 INFO L225 Difference]: With dead ends: 529 [2021-08-21 12:17:43,593 INFO L226 Difference]: Without dead ends: 522 [2021-08-21 12:17:43,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-21 12:17:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 291. [2021-08-21 12:17:43,599 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) [2021-08-21 12:17:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 902 transitions. [2021-08-21 12:17:43,599 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 902 transitions. Word has length 18 [2021-08-21 12:17:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:43,600 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 902 transitions. [2021-08-21 12:17:43,600 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) [2021-08-21 12:17:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 902 transitions. [2021-08-21 12:17:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:43,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:43,600 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:43,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-08-21 12:17:43,601 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -689531367, now seen corresponding path program 39 times [2021-08-21 12:17:43,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:43,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530183531] [2021-08-21 12:17:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:43,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:43,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:43,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530183531] [2021-08-21 12:17:43,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530183531] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:43,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:43,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:43,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994700788] [2021-08-21 12:17:43,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:43,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:43,680 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) [2021-08-21 12:17:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:43,823 INFO L93 Difference]: Finished difference Result 521 states and 1512 transitions. [2021-08-21 12:17:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:17:43,823 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 [2021-08-21 12:17:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:43,824 INFO L225 Difference]: With dead ends: 521 [2021-08-21 12:17:43,824 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 12:17:43,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 12:17:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 291. [2021-08-21 12:17:43,828 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) [2021-08-21 12:17:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 902 transitions. [2021-08-21 12:17:43,829 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 902 transitions. Word has length 18 [2021-08-21 12:17:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:43,829 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 902 transitions. [2021-08-21 12:17:43,829 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) [2021-08-21 12:17:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 902 transitions. [2021-08-21 12:17:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:43,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:43,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:43,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-08-21 12:17:43,830 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:43,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1167570673, now seen corresponding path program 55 times [2021-08-21 12:17:43,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:43,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089065670] [2021-08-21 12:17:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:43,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:43,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:43,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089065670] [2021-08-21 12:17:43,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089065670] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:43,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:43,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:43,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538419488] [2021-08-21 12:17:43,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:43,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:43,893 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) [2021-08-21 12:17:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:44,011 INFO L93 Difference]: Finished difference Result 548 states and 1570 transitions. [2021-08-21 12:17:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:44,012 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 [2021-08-21 12:17:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:44,013 INFO L225 Difference]: With dead ends: 548 [2021-08-21 12:17:44,013 INFO L226 Difference]: Without dead ends: 542 [2021-08-21 12:17:44,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:44,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-08-21 12:17:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 294. [2021-08-21 12:17:44,017 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) [2021-08-21 12:17:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 904 transitions. [2021-08-21 12:17:44,017 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 904 transitions. Word has length 18 [2021-08-21 12:17:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:44,017 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 904 transitions. [2021-08-21 12:17:44,017 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) [2021-08-21 12:17:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 904 transitions. [2021-08-21 12:17:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:44,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:44,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:44,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-08-21 12:17:44,018 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:44,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1308750773, now seen corresponding path program 56 times [2021-08-21 12:17:44,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:44,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527245223] [2021-08-21 12:17:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:44,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:44,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:44,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527245223] [2021-08-21 12:17:44,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527245223] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:44,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:44,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:44,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352633845] [2021-08-21 12:17:44,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:44,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:44,088 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) [2021-08-21 12:17:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:44,220 INFO L93 Difference]: Finished difference Result 546 states and 1563 transitions. [2021-08-21 12:17:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:44,221 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 [2021-08-21 12:17:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:44,221 INFO L225 Difference]: With dead ends: 546 [2021-08-21 12:17:44,221 INFO L226 Difference]: Without dead ends: 546 [2021-08-21 12:17:44,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-21 12:17:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 287. [2021-08-21 12:17:44,225 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) [2021-08-21 12:17:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 886 transitions. [2021-08-21 12:17:44,226 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 886 transitions. Word has length 18 [2021-08-21 12:17:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:44,226 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 886 transitions. [2021-08-21 12:17:44,226 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) [2021-08-21 12:17:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 886 transitions. [2021-08-21 12:17:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:44,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:44,226 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:44,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-08-21 12:17:44,226 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash -314375153, now seen corresponding path program 57 times [2021-08-21 12:17:44,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:44,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194209795] [2021-08-21 12:17:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:44,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:44,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:44,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194209795] [2021-08-21 12:17:44,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194209795] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:44,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:44,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:44,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755260757] [2021-08-21 12:17:44,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:44,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:44,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:44,296 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) [2021-08-21 12:17:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:44,410 INFO L93 Difference]: Finished difference Result 509 states and 1481 transitions. [2021-08-21 12:17:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:44,410 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 [2021-08-21 12:17:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:44,411 INFO L225 Difference]: With dead ends: 509 [2021-08-21 12:17:44,411 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:17:44,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:17:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 284. [2021-08-21 12:17:44,414 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) [2021-08-21 12:17:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-08-21 12:17:44,415 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-08-21 12:17:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:44,415 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-08-21 12:17:44,415 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) [2021-08-21 12:17:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-08-21 12:17:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:44,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:44,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:44,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-08-21 12:17:44,416 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1958006945, now seen corresponding path program 40 times [2021-08-21 12:17:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:44,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186447152] [2021-08-21 12:17:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:44,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:44,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:44,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186447152] [2021-08-21 12:17:44,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186447152] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:44,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:44,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:44,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659538634] [2021-08-21 12:17:44,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:44,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:44,474 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) [2021-08-21 12:17:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:44,567 INFO L93 Difference]: Finished difference Result 486 states and 1417 transitions. [2021-08-21 12:17:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:44,567 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 [2021-08-21 12:17:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:44,568 INFO L225 Difference]: With dead ends: 486 [2021-08-21 12:17:44,568 INFO L226 Difference]: Without dead ends: 479 [2021-08-21 12:17:44,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-21 12:17:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 288. [2021-08-21 12:17:44,572 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) [2021-08-21 12:17:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 885 transitions. [2021-08-21 12:17:44,572 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 885 transitions. Word has length 18 [2021-08-21 12:17:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:44,572 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 885 transitions. [2021-08-21 12:17:44,572 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) [2021-08-21 12:17:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 885 transitions. [2021-08-21 12:17:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:44,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:44,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:44,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-08-21 12:17:44,573 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash 645541639, now seen corresponding path program 41 times [2021-08-21 12:17:44,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:44,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441805934] [2021-08-21 12:17:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:44,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:44,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:44,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441805934] [2021-08-21 12:17:44,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441805934] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:44,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:44,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:44,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266049430] [2021-08-21 12:17:44,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:44,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:44,646 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) [2021-08-21 12:17:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:44,750 INFO L93 Difference]: Finished difference Result 509 states and 1477 transitions. [2021-08-21 12:17:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:44,750 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 [2021-08-21 12:17:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:44,751 INFO L225 Difference]: With dead ends: 509 [2021-08-21 12:17:44,751 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:17:44,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:17:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 286. [2021-08-21 12:17:44,755 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) [2021-08-21 12:17:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-08-21 12:17:44,756 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-08-21 12:17:44,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:44,756 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-08-21 12:17:44,756 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) [2021-08-21 12:17:44,756 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-08-21 12:17:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:44,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:44,756 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:44,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-08-21 12:17:44,756 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -792419897, now seen corresponding path program 42 times [2021-08-21 12:17:44,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:44,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489925929] [2021-08-21 12:17:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:44,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:44,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:44,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489925929] [2021-08-21 12:17:44,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489925929] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:44,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:44,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:44,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794461694] [2021-08-21 12:17:44,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:44,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:44,829 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) [2021-08-21 12:17:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:44,934 INFO L93 Difference]: Finished difference Result 517 states and 1501 transitions. [2021-08-21 12:17:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:44,934 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 [2021-08-21 12:17:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:44,935 INFO L225 Difference]: With dead ends: 517 [2021-08-21 12:17:44,935 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 12:17:44,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 12:17:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 289. [2021-08-21 12:17:44,939 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) [2021-08-21 12:17:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 895 transitions. [2021-08-21 12:17:44,939 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 895 transitions. Word has length 18 [2021-08-21 12:17:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:44,940 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 895 transitions. [2021-08-21 12:17:44,940 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) [2021-08-21 12:17:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 895 transitions. [2021-08-21 12:17:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:44,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:44,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:44,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-08-21 12:17:44,940 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash -13314381, now seen corresponding path program 43 times [2021-08-21 12:17:44,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:44,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752119060] [2021-08-21 12:17:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:44,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:45,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:45,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752119060] [2021-08-21 12:17:45,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752119060] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:45,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:45,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:45,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344055885] [2021-08-21 12:17:45,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:45,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:45,037 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) [2021-08-21 12:17:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:45,164 INFO L93 Difference]: Finished difference Result 484 states and 1430 transitions. [2021-08-21 12:17:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:45,164 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 [2021-08-21 12:17:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:45,165 INFO L225 Difference]: With dead ends: 484 [2021-08-21 12:17:45,165 INFO L226 Difference]: Without dead ends: 484 [2021-08-21 12:17:45,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-21 12:17:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 286. [2021-08-21 12:17:45,169 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) [2021-08-21 12:17:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-08-21 12:17:45,169 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-08-21 12:17:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:45,169 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-08-21 12:17:45,169 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) [2021-08-21 12:17:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-08-21 12:17:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:45,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:45,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:45,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-08-21 12:17:45,170 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash 666077979, now seen corresponding path program 58 times [2021-08-21 12:17:45,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:45,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601296206] [2021-08-21 12:17:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:45,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:45,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601296206] [2021-08-21 12:17:45,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601296206] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:45,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:45,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:45,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290266605] [2021-08-21 12:17:45,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:45,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:45,251 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) [2021-08-21 12:17:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:45,405 INFO L93 Difference]: Finished difference Result 541 states and 1547 transitions. [2021-08-21 12:17:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:45,406 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 [2021-08-21 12:17:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:45,407 INFO L225 Difference]: With dead ends: 541 [2021-08-21 12:17:45,407 INFO L226 Difference]: Without dead ends: 535 [2021-08-21 12:17:45,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-08-21 12:17:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 296. [2021-08-21 12:17:45,412 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) [2021-08-21 12:17:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 907 transitions. [2021-08-21 12:17:45,412 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 907 transitions. Word has length 18 [2021-08-21 12:17:45,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:45,413 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 907 transitions. [2021-08-21 12:17:45,413 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) [2021-08-21 12:17:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 907 transitions. [2021-08-21 12:17:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:45,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:45,413 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:45,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-08-21 12:17:45,414 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash 689977893, now seen corresponding path program 59 times [2021-08-21 12:17:45,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:45,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013000296] [2021-08-21 12:17:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:45,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:45,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:45,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013000296] [2021-08-21 12:17:45,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013000296] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:45,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:45,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:45,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328973021] [2021-08-21 12:17:45,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:45,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:45,485 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) [2021-08-21 12:17:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:45,636 INFO L93 Difference]: Finished difference Result 518 states and 1508 transitions. [2021-08-21 12:17:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:45,636 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 [2021-08-21 12:17:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:45,637 INFO L225 Difference]: With dead ends: 518 [2021-08-21 12:17:45,637 INFO L226 Difference]: Without dead ends: 518 [2021-08-21 12:17:45,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-21 12:17:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 285. [2021-08-21 12:17:45,641 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) [2021-08-21 12:17:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-21 12:17:45,641 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-21 12:17:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:45,641 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-21 12:17:45,641 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) [2021-08-21 12:17:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-21 12:17:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:45,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:45,642 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:45,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-08-21 12:17:45,642 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1709208679, now seen corresponding path program 44 times [2021-08-21 12:17:45,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:45,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110874544] [2021-08-21 12:17:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:45,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:45,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:45,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110874544] [2021-08-21 12:17:45,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110874544] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:45,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:45,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:45,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302438900] [2021-08-21 12:17:45,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:45,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:45,702 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) [2021-08-21 12:17:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:45,804 INFO L93 Difference]: Finished difference Result 587 states and 1716 transitions. [2021-08-21 12:17:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:45,804 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 [2021-08-21 12:17:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:45,805 INFO L225 Difference]: With dead ends: 587 [2021-08-21 12:17:45,805 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 12:17:45,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 12:17:45,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 288. [2021-08-21 12:17:45,809 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) [2021-08-21 12:17:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 886 transitions. [2021-08-21 12:17:45,816 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 886 transitions. Word has length 18 [2021-08-21 12:17:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:45,817 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 886 transitions. [2021-08-21 12:17:45,817 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) [2021-08-21 12:17:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 886 transitions. [2021-08-21 12:17:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:45,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:45,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:45,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-08-21 12:17:45,817 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1390118769, now seen corresponding path program 45 times [2021-08-21 12:17:45,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:45,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986663220] [2021-08-21 12:17:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:45,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:45,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:45,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986663220] [2021-08-21 12:17:45,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986663220] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:45,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:45,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:45,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601417805] [2021-08-21 12:17:45,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:45,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:45,898 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) [2021-08-21 12:17:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:46,034 INFO L93 Difference]: Finished difference Result 565 states and 1644 transitions. [2021-08-21 12:17:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:46,034 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 [2021-08-21 12:17:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:46,035 INFO L225 Difference]: With dead ends: 565 [2021-08-21 12:17:46,035 INFO L226 Difference]: Without dead ends: 565 [2021-08-21 12:17:46,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-21 12:17:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 291. [2021-08-21 12:17:46,039 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) [2021-08-21 12:17:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 901 transitions. [2021-08-21 12:17:46,040 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 901 transitions. Word has length 18 [2021-08-21 12:17:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:46,040 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 901 transitions. [2021-08-21 12:17:46,040 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) [2021-08-21 12:17:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 901 transitions. [2021-08-21 12:17:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:46,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:46,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:46,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-08-21 12:17:46,040 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:46,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2125743011, now seen corresponding path program 46 times [2021-08-21 12:17:46,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:46,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405430130] [2021-08-21 12:17:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:46,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:46,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:46,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405430130] [2021-08-21 12:17:46,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405430130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:46,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:46,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:46,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206249645] [2021-08-21 12:17:46,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:46,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:46,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:46,107 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) [2021-08-21 12:17:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:46,231 INFO L93 Difference]: Finished difference Result 532 states and 1573 transitions. [2021-08-21 12:17:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:46,231 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 [2021-08-21 12:17:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:46,232 INFO L225 Difference]: With dead ends: 532 [2021-08-21 12:17:46,232 INFO L226 Difference]: Without dead ends: 532 [2021-08-21 12:17:46,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-21 12:17:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 285. [2021-08-21 12:17:46,236 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) [2021-08-21 12:17:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-21 12:17:46,237 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-21 12:17:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:46,237 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-21 12:17:46,237 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) [2021-08-21 12:17:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-21 12:17:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:46,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:46,237 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:46,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-08-21 12:17:46,237 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1868836377, now seen corresponding path program 60 times [2021-08-21 12:17:46,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:46,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839741509] [2021-08-21 12:17:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:46,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:46,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:46,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839741509] [2021-08-21 12:17:46,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839741509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:46,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:46,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:46,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267850408] [2021-08-21 12:17:46,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:46,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:46,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:46,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:46,297 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) [2021-08-21 12:17:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:46,451 INFO L93 Difference]: Finished difference Result 526 states and 1497 transitions. [2021-08-21 12:17:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:46,451 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 [2021-08-21 12:17:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:46,452 INFO L225 Difference]: With dead ends: 526 [2021-08-21 12:17:46,452 INFO L226 Difference]: Without dead ends: 520 [2021-08-21 12:17:46,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-21 12:17:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 297. [2021-08-21 12:17:46,457 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) [2021-08-21 12:17:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 906 transitions. [2021-08-21 12:17:46,457 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 906 transitions. Word has length 18 [2021-08-21 12:17:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:46,458 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 906 transitions. [2021-08-21 12:17:46,458 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) [2021-08-21 12:17:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 906 transitions. [2021-08-21 12:17:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:46,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:46,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:46,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-08-21 12:17:46,458 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1844936463, now seen corresponding path program 61 times [2021-08-21 12:17:46,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:46,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292197484] [2021-08-21 12:17:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:46,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:46,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:46,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292197484] [2021-08-21 12:17:46,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292197484] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:46,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:46,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:46,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760755677] [2021-08-21 12:17:46,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:46,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:46,529 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) [2021-08-21 12:17:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:46,662 INFO L93 Difference]: Finished difference Result 497 states and 1443 transitions. [2021-08-21 12:17:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:46,663 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 [2021-08-21 12:17:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:46,664 INFO L225 Difference]: With dead ends: 497 [2021-08-21 12:17:46,664 INFO L226 Difference]: Without dead ends: 497 [2021-08-21 12:17:46,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-21 12:17:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 284. [2021-08-21 12:17:46,669 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) [2021-08-21 12:17:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 869 transitions. [2021-08-21 12:17:46,669 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 869 transitions. Word has length 18 [2021-08-21 12:17:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:46,669 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 869 transitions. [2021-08-21 12:17:46,669 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) [2021-08-21 12:17:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 869 transitions. [2021-08-21 12:17:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:46,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:46,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:46,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-08-21 12:17:46,670 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:46,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1396696717, now seen corresponding path program 62 times [2021-08-21 12:17:46,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:46,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621471755] [2021-08-21 12:17:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:46,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:46,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:46,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621471755] [2021-08-21 12:17:46,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621471755] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:46,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:46,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:46,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223076058] [2021-08-21 12:17:46,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:46,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:46,740 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) [2021-08-21 12:17:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:46,830 INFO L93 Difference]: Finished difference Result 534 states and 1549 transitions. [2021-08-21 12:17:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:46,830 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 [2021-08-21 12:17:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:46,831 INFO L225 Difference]: With dead ends: 534 [2021-08-21 12:17:46,831 INFO L226 Difference]: Without dead ends: 534 [2021-08-21 12:17:46,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-08-21 12:17:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 293. [2021-08-21 12:17:46,835 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) [2021-08-21 12:17:46,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 914 transitions. [2021-08-21 12:17:46,836 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 914 transitions. Word has length 18 [2021-08-21 12:17:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:46,836 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 914 transitions. [2021-08-21 12:17:46,836 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) [2021-08-21 12:17:46,836 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 914 transitions. [2021-08-21 12:17:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:46,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:46,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:46,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-08-21 12:17:46,836 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1189096637, now seen corresponding path program 47 times [2021-08-21 12:17:46,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:46,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678624816] [2021-08-21 12:17:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:46,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:46,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:46,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678624816] [2021-08-21 12:17:46,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678624816] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:46,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:46,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:46,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324144202] [2021-08-21 12:17:46,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:46,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:46,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:46,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:46,894 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) [2021-08-21 12:17:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:46,999 INFO L93 Difference]: Finished difference Result 475 states and 1393 transitions. [2021-08-21 12:17:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:46,999 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 [2021-08-21 12:17:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:47,000 INFO L225 Difference]: With dead ends: 475 [2021-08-21 12:17:47,000 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 12:17:47,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 12:17:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 295. [2021-08-21 12:17:47,003 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) [2021-08-21 12:17:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 922 transitions. [2021-08-21 12:17:47,004 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 922 transitions. Word has length 18 [2021-08-21 12:17:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 922 transitions. [2021-08-21 12:17:47,004 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) [2021-08-21 12:17:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 922 transitions. [2021-08-21 12:17:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:47,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:47,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:47,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-08-21 12:17:47,005 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:47,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1538153839, now seen corresponding path program 48 times [2021-08-21 12:17:47,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:47,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906428088] [2021-08-21 12:17:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:47,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:47,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:47,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906428088] [2021-08-21 12:17:47,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906428088] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:47,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:47,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:47,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194444533] [2021-08-21 12:17:47,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:47,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:47,084 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) [2021-08-21 12:17:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:47,186 INFO L93 Difference]: Finished difference Result 450 states and 1320 transitions. [2021-08-21 12:17:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:47,187 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 [2021-08-21 12:17:47,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:47,187 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:17:47,187 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 12:17:47,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:47,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 12:17:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-08-21 12:17:47,191 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) [2021-08-21 12:17:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 922 transitions. [2021-08-21 12:17:47,192 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 922 transitions. Word has length 18 [2021-08-21 12:17:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:47,192 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 922 transitions. [2021-08-21 12:17:47,192 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) [2021-08-21 12:17:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 922 transitions. [2021-08-21 12:17:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:47,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:47,192 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:47,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-08-21 12:17:47,192 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2016193145, now seen corresponding path program 63 times [2021-08-21 12:17:47,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:47,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307385608] [2021-08-21 12:17:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:47,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:47,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:47,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307385608] [2021-08-21 12:17:47,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307385608] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:47,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:47,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:47,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470629090] [2021-08-21 12:17:47,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:47,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:47,258 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) [2021-08-21 12:17:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:47,365 INFO L93 Difference]: Finished difference Result 535 states and 1543 transitions. [2021-08-21 12:17:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:47,365 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 [2021-08-21 12:17:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:47,366 INFO L225 Difference]: With dead ends: 535 [2021-08-21 12:17:47,366 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 12:17:47,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 12:17:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 298. [2021-08-21 12:17:47,370 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) [2021-08-21 12:17:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-08-21 12:17:47,370 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-08-21 12:17:47,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:47,370 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-08-21 12:17:47,371 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) [2021-08-21 12:17:47,371 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-08-21 12:17:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:47,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:47,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:47,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-08-21 12:17:47,371 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:47,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2137594051, now seen corresponding path program 64 times [2021-08-21 12:17:47,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:47,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661830836] [2021-08-21 12:17:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:47,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:47,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:47,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661830836] [2021-08-21 12:17:47,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661830836] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:47,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:47,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:47,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959685237] [2021-08-21 12:17:47,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:47,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:47,440 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) [2021-08-21 12:17:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:47,555 INFO L93 Difference]: Finished difference Result 594 states and 1700 transitions. [2021-08-21 12:17:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:47,555 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 [2021-08-21 12:17:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:47,556 INFO L225 Difference]: With dead ends: 594 [2021-08-21 12:17:47,556 INFO L226 Difference]: Without dead ends: 594 [2021-08-21 12:17:47,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-21 12:17:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 301. [2021-08-21 12:17:47,561 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) [2021-08-21 12:17:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 939 transitions. [2021-08-21 12:17:47,561 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 939 transitions. Word has length 18 [2021-08-21 12:17:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:47,561 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 939 transitions. [2021-08-21 12:17:47,561 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) [2021-08-21 12:17:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 939 transitions. [2021-08-21 12:17:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:47,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:47,562 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:47,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-08-21 12:17:47,562 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1162997625, now seen corresponding path program 65 times [2021-08-21 12:17:47,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:47,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426216513] [2021-08-21 12:17:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:47,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:47,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:47,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426216513] [2021-08-21 12:17:47,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426216513] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:47,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:47,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:47,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572594725] [2021-08-21 12:17:47,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:47,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:47,633 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) [2021-08-21 12:17:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:47,775 INFO L93 Difference]: Finished difference Result 557 states and 1618 transitions. [2021-08-21 12:17:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:47,776 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 [2021-08-21 12:17:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:47,776 INFO L225 Difference]: With dead ends: 557 [2021-08-21 12:17:47,776 INFO L226 Difference]: Without dead ends: 557 [2021-08-21 12:17:47,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:47,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-21 12:17:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 298. [2021-08-21 12:17:47,780 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) [2021-08-21 12:17:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-08-21 12:17:47,781 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-08-21 12:17:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:47,781 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-08-21 12:17:47,781 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) [2021-08-21 12:17:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-08-21 12:17:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:47,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:47,782 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:47,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-08-21 12:17:47,782 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1488337879, now seen corresponding path program 49 times [2021-08-21 12:17:47,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:47,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56257120] [2021-08-21 12:17:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:47,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:47,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:47,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56257120] [2021-08-21 12:17:47,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56257120] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:47,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:47,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:47,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182765985] [2021-08-21 12:17:47,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:47,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:47,839 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) [2021-08-21 12:17:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:47,933 INFO L93 Difference]: Finished difference Result 516 states and 1480 transitions. [2021-08-21 12:17:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:47,933 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 [2021-08-21 12:17:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:47,934 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:17:47,934 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 12:17:47,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 12:17:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 299. [2021-08-21 12:17:47,938 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) [2021-08-21 12:17:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 923 transitions. [2021-08-21 12:17:47,938 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 923 transitions. Word has length 18 [2021-08-21 12:17:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:47,938 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 923 transitions. [2021-08-21 12:17:47,938 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) [2021-08-21 12:17:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 923 transitions. [2021-08-21 12:17:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:47,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:47,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:47,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-08-21 12:17:47,939 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash -203080833, now seen corresponding path program 50 times [2021-08-21 12:17:47,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:47,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003326568] [2021-08-21 12:17:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:47,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:48,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:48,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003326568] [2021-08-21 12:17:48,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003326568] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:48,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:48,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:48,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102216564] [2021-08-21 12:17:48,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:48,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:48,014 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) [2021-08-21 12:17:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:48,138 INFO L93 Difference]: Finished difference Result 566 states and 1578 transitions. [2021-08-21 12:17:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:17:48,139 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 [2021-08-21 12:17:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:48,140 INFO L225 Difference]: With dead ends: 566 [2021-08-21 12:17:48,140 INFO L226 Difference]: Without dead ends: 566 [2021-08-21 12:17:48,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-21 12:17:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 297. [2021-08-21 12:17:48,144 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) [2021-08-21 12:17:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 918 transitions. [2021-08-21 12:17:48,144 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 918 transitions. Word has length 18 [2021-08-21 12:17:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:48,144 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 918 transitions. [2021-08-21 12:17:48,144 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) [2021-08-21 12:17:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 918 transitions. [2021-08-21 12:17:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:48,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:48,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:48,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-08-21 12:17:48,145 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1641042369, now seen corresponding path program 51 times [2021-08-21 12:17:48,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:48,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777204509] [2021-08-21 12:17:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:48,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:48,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:48,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777204509] [2021-08-21 12:17:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777204509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:48,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:48,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:48,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539198859] [2021-08-21 12:17:48,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:48,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:48,227 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) [2021-08-21 12:17:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:48,335 INFO L93 Difference]: Finished difference Result 512 states and 1469 transitions. [2021-08-21 12:17:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:48,335 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 [2021-08-21 12:17:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:48,336 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:17:48,336 INFO L226 Difference]: Without dead ends: 512 [2021-08-21 12:17:48,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-21 12:17:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 300. [2021-08-21 12:17:48,340 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) [2021-08-21 12:17:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 933 transitions. [2021-08-21 12:17:48,341 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 933 transitions. Word has length 18 [2021-08-21 12:17:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:48,341 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 933 transitions. [2021-08-21 12:17:48,341 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) [2021-08-21 12:17:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 933 transitions. [2021-08-21 12:17:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:48,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:48,341 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:48,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-08-21 12:17:48,341 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash -861936853, now seen corresponding path program 52 times [2021-08-21 12:17:48,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:48,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94162554] [2021-08-21 12:17:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:48,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:48,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:48,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94162554] [2021-08-21 12:17:48,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94162554] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:48,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:48,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:48,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081282243] [2021-08-21 12:17:48,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:48,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:48,415 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) [2021-08-21 12:17:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:48,519 INFO L93 Difference]: Finished difference Result 546 states and 1550 transitions. [2021-08-21 12:17:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:48,519 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 [2021-08-21 12:17:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:48,520 INFO L225 Difference]: With dead ends: 546 [2021-08-21 12:17:48,520 INFO L226 Difference]: Without dead ends: 546 [2021-08-21 12:17:48,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-08-21 12:17:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 297. [2021-08-21 12:17:48,524 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) [2021-08-21 12:17:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 918 transitions. [2021-08-21 12:17:48,524 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 918 transitions. Word has length 18 [2021-08-21 12:17:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:48,524 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 918 transitions. [2021-08-21 12:17:48,524 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) [2021-08-21 12:17:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 918 transitions. [2021-08-21 12:17:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:48,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:48,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:48,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-08-21 12:17:48,525 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash -182544493, now seen corresponding path program 66 times [2021-08-21 12:17:48,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:48,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200917276] [2021-08-21 12:17:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:48,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:48,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:48,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200917276] [2021-08-21 12:17:48,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200917276] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:48,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:48,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:48,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805085739] [2021-08-21 12:17:48,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:48,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:48,590 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) [2021-08-21 12:17:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:48,724 INFO L93 Difference]: Finished difference Result 576 states and 1636 transitions. [2021-08-21 12:17:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:48,724 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 [2021-08-21 12:17:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:48,725 INFO L225 Difference]: With dead ends: 576 [2021-08-21 12:17:48,725 INFO L226 Difference]: Without dead ends: 570 [2021-08-21 12:17:48,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-21 12:17:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 301. [2021-08-21 12:17:48,729 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) [2021-08-21 12:17:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 932 transitions. [2021-08-21 12:17:48,729 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 932 transitions. Word has length 18 [2021-08-21 12:17:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:48,730 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 932 transitions. [2021-08-21 12:17:48,730 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) [2021-08-21 12:17:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 932 transitions. [2021-08-21 12:17:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:48,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:48,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:48,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-08-21 12:17:48,730 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:48,730 INFO L82 PathProgramCache]: Analyzing trace with hash -158644579, now seen corresponding path program 67 times [2021-08-21 12:17:48,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:48,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559898910] [2021-08-21 12:17:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:48,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:48,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:48,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559898910] [2021-08-21 12:17:48,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559898910] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:48,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:48,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:48,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359238355] [2021-08-21 12:17:48,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:48,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:48,795 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) [2021-08-21 12:17:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:48,944 INFO L93 Difference]: Finished difference Result 559 states and 1618 transitions. [2021-08-21 12:17:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:48,944 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 [2021-08-21 12:17:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:48,945 INFO L225 Difference]: With dead ends: 559 [2021-08-21 12:17:48,945 INFO L226 Difference]: Without dead ends: 559 [2021-08-21 12:17:48,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-21 12:17:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 298. [2021-08-21 12:17:48,950 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) [2021-08-21 12:17:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 921 transitions. [2021-08-21 12:17:48,951 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 921 transitions. Word has length 18 [2021-08-21 12:17:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:48,951 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 921 transitions. [2021-08-21 12:17:48,951 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) [2021-08-21 12:17:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 921 transitions. [2021-08-21 12:17:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:48,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:48,952 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:48,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-08-21 12:17:48,952 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:48,952 INFO L82 PathProgramCache]: Analyzing trace with hash 25165421, now seen corresponding path program 68 times [2021-08-21 12:17:48,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:48,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319930538] [2021-08-21 12:17:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:48,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:49,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:49,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319930538] [2021-08-21 12:17:49,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319930538] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:49,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:49,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:49,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603986402] [2021-08-21 12:17:49,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:49,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:49,024 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) [2021-08-21 12:17:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:49,136 INFO L93 Difference]: Finished difference Result 515 states and 1504 transitions. [2021-08-21 12:17:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:49,136 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 [2021-08-21 12:17:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:49,137 INFO L225 Difference]: With dead ends: 515 [2021-08-21 12:17:49,137 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 12:17:49,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 12:17:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 299. [2021-08-21 12:17:49,143 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) [2021-08-21 12:17:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 923 transitions. [2021-08-21 12:17:49,143 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 923 transitions. Word has length 18 [2021-08-21 12:17:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:49,143 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 923 transitions. [2021-08-21 12:17:49,143 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) [2021-08-21 12:17:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 923 transitions. [2021-08-21 12:17:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:49,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:49,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:49,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-08-21 12:17:49,144 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:49,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1019541041, now seen corresponding path program 69 times [2021-08-21 12:17:49,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:49,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636407056] [2021-08-21 12:17:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:49,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:49,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:49,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636407056] [2021-08-21 12:17:49,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636407056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:49,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436751620] [2021-08-21 12:17:49,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:49,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:49,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:49,206 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:49,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:17:49,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:17:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:17:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:49,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436751620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:49,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:49,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:17:49,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850602226] [2021-08-21 12:17:49,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:17:49,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:17:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:49,840 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) [2021-08-21 12:17:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:50,054 INFO L93 Difference]: Finished difference Result 503 states and 1471 transitions. [2021-08-21 12:17:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:50,054 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 [2021-08-21 12:17:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:50,055 INFO L225 Difference]: With dead ends: 503 [2021-08-21 12:17:50,055 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 12:17:50,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 12:17:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 288. [2021-08-21 12:17:50,059 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) [2021-08-21 12:17:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 886 transitions. [2021-08-21 12:17:50,060 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 886 transitions. Word has length 18 [2021-08-21 12:17:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:50,060 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 886 transitions. [2021-08-21 12:17:50,060 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) [2021-08-21 12:17:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 886 transitions. [2021-08-21 12:17:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:50,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:50,060 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:50,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 12:17:50,260 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 [2021-08-21 12:17:50,261 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash 302220927, now seen corresponding path program 70 times [2021-08-21 12:17:50,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:50,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824042508] [2021-08-21 12:17:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:50,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:50,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:50,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824042508] [2021-08-21 12:17:50,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824042508] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:50,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:50,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:50,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384871488] [2021-08-21 12:17:50,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:50,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:50,318 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) [2021-08-21 12:17:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:50,419 INFO L93 Difference]: Finished difference Result 493 states and 1430 transitions. [2021-08-21 12:17:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:50,419 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 [2021-08-21 12:17:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:50,420 INFO L225 Difference]: With dead ends: 493 [2021-08-21 12:17:50,420 INFO L226 Difference]: Without dead ends: 493 [2021-08-21 12:17:50,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-21 12:17:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 285. [2021-08-21 12:17:50,424 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) [2021-08-21 12:17:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 874 transitions. [2021-08-21 12:17:50,424 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 874 transitions. Word has length 18 [2021-08-21 12:17:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:50,424 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 874 transitions. [2021-08-21 12:17:50,424 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) [2021-08-21 12:17:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 874 transitions. [2021-08-21 12:17:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:50,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:50,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:50,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-08-21 12:17:50,425 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1046576477, now seen corresponding path program 53 times [2021-08-21 12:17:50,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:50,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070075102] [2021-08-21 12:17:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:50,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:50,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:50,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070075102] [2021-08-21 12:17:50,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070075102] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:50,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:50,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:50,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604663084] [2021-08-21 12:17:50,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:50,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:50,473 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) [2021-08-21 12:17:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:50,549 INFO L93 Difference]: Finished difference Result 415 states and 1217 transitions. [2021-08-21 12:17:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:50,550 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 [2021-08-21 12:17:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:50,550 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:17:50,550 INFO L226 Difference]: Without dead ends: 408 [2021-08-21 12:17:50,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-21 12:17:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 289. [2021-08-21 12:17:50,554 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) [2021-08-21 12:17:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 886 transitions. [2021-08-21 12:17:50,554 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 886 transitions. Word has length 18 [2021-08-21 12:17:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:50,554 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 886 transitions. [2021-08-21 12:17:50,554 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) [2021-08-21 12:17:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 886 transitions. [2021-08-21 12:17:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:50,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:50,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:50,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-08-21 12:17:50,555 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1556972107, now seen corresponding path program 54 times [2021-08-21 12:17:50,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:50,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133003946] [2021-08-21 12:17:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:50,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:50,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:50,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133003946] [2021-08-21 12:17:50,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133003946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:50,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:50,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:50,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189599602] [2021-08-21 12:17:50,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:50,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:50,620 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) [2021-08-21 12:17:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:50,730 INFO L93 Difference]: Finished difference Result 427 states and 1242 transitions. [2021-08-21 12:17:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:50,731 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 [2021-08-21 12:17:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:50,731 INFO L225 Difference]: With dead ends: 427 [2021-08-21 12:17:50,731 INFO L226 Difference]: Without dead ends: 427 [2021-08-21 12:17:50,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-21 12:17:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 287. [2021-08-21 12:17:50,735 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) [2021-08-21 12:17:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 881 transitions. [2021-08-21 12:17:50,735 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 881 transitions. Word has length 18 [2021-08-21 12:17:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:50,735 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 881 transitions. [2021-08-21 12:17:50,735 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) [2021-08-21 12:17:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 881 transitions. [2021-08-21 12:17:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:50,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:50,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:50,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-08-21 12:17:50,736 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash 635269967, now seen corresponding path program 55 times [2021-08-21 12:17:50,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:50,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269239991] [2021-08-21 12:17:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:50,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:50,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:50,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269239991] [2021-08-21 12:17:50,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269239991] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:50,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:50,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:50,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152025627] [2021-08-21 12:17:50,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:50,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:50,790 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) [2021-08-21 12:17:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:50,880 INFO L93 Difference]: Finished difference Result 422 states and 1230 transitions. [2021-08-21 12:17:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:50,880 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 [2021-08-21 12:17:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:50,881 INFO L225 Difference]: With dead ends: 422 [2021-08-21 12:17:50,881 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 12:17:50,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 12:17:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 285. [2021-08-21 12:17:50,885 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) [2021-08-21 12:17:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 876 transitions. [2021-08-21 12:17:50,885 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 876 transitions. Word has length 18 [2021-08-21 12:17:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:50,885 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 876 transitions. [2021-08-21 12:17:50,885 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) [2021-08-21 12:17:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 876 transitions. [2021-08-21 12:17:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:50,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:50,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:50,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-08-21 12:17:50,886 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:50,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1148446607, now seen corresponding path program 56 times [2021-08-21 12:17:50,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:50,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777283396] [2021-08-21 12:17:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:50,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:50,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:50,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777283396] [2021-08-21 12:17:50,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777283396] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:50,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:50,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:50,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034323584] [2021-08-21 12:17:50,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:50,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:50,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:50,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:50,955 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) [2021-08-21 12:17:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:51,063 INFO L93 Difference]: Finished difference Result 538 states and 1541 transitions. [2021-08-21 12:17:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:51,063 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 [2021-08-21 12:17:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:51,064 INFO L225 Difference]: With dead ends: 538 [2021-08-21 12:17:51,064 INFO L226 Difference]: Without dead ends: 538 [2021-08-21 12:17:51,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-21 12:17:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 291. [2021-08-21 12:17:51,068 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) [2021-08-21 12:17:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 903 transitions. [2021-08-21 12:17:51,069 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 903 transitions. Word has length 18 [2021-08-21 12:17:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:51,069 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 903 transitions. [2021-08-21 12:17:51,069 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) [2021-08-21 12:17:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 903 transitions. [2021-08-21 12:17:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:51,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:51,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:51,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-08-21 12:17:51,069 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -369341091, now seen corresponding path program 57 times [2021-08-21 12:17:51,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:51,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521790680] [2021-08-21 12:17:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:51,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:51,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:51,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521790680] [2021-08-21 12:17:51,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521790680] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:51,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:51,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:51,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813628854] [2021-08-21 12:17:51,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:51,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:51,135 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) [2021-08-21 12:17:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:51,254 INFO L93 Difference]: Finished difference Result 544 states and 1556 transitions. [2021-08-21 12:17:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:51,254 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 [2021-08-21 12:17:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:51,255 INFO L225 Difference]: With dead ends: 544 [2021-08-21 12:17:51,255 INFO L226 Difference]: Without dead ends: 544 [2021-08-21 12:17:51,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-21 12:17:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 288. [2021-08-21 12:17:51,259 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) [2021-08-21 12:17:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 888 transitions. [2021-08-21 12:17:51,259 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 888 transitions. Word has length 18 [2021-08-21 12:17:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:51,259 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 888 transitions. [2021-08-21 12:17:51,259 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) [2021-08-21 12:17:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 888 transitions. [2021-08-21 12:17:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:51,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:51,260 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:51,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-08-21 12:17:51,260 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:51,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1698038511, now seen corresponding path program 58 times [2021-08-21 12:17:51,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:51,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193503782] [2021-08-21 12:17:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:51,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:51,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:51,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193503782] [2021-08-21 12:17:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193503782] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:51,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:51,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:51,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536181256] [2021-08-21 12:17:51,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:51,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:51,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:51,318 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) [2021-08-21 12:17:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:51,417 INFO L93 Difference]: Finished difference Result 532 states and 1524 transitions. [2021-08-21 12:17:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:51,417 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 [2021-08-21 12:17:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:51,418 INFO L225 Difference]: With dead ends: 532 [2021-08-21 12:17:51,418 INFO L226 Difference]: Without dead ends: 532 [2021-08-21 12:17:51,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:17:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-21 12:17:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 285. [2021-08-21 12:17:51,422 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) [2021-08-21 12:17:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 876 transitions. [2021-08-21 12:17:51,422 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 876 transitions. Word has length 18 [2021-08-21 12:17:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:51,422 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 876 transitions. [2021-08-21 12:17:51,422 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) [2021-08-21 12:17:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 876 transitions. [2021-08-21 12:17:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:51,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:51,423 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:51,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-08-21 12:17:51,423 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:51,423 INFO L82 PathProgramCache]: Analyzing trace with hash -112434457, now seen corresponding path program 71 times [2021-08-21 12:17:51,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:51,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746997950] [2021-08-21 12:17:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:51,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:51,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:51,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746997950] [2021-08-21 12:17:51,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746997950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:51,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:51,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:51,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758874443] [2021-08-21 12:17:51,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:51,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:51,476 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) [2021-08-21 12:17:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:51,602 INFO L93 Difference]: Finished difference Result 543 states and 1541 transitions. [2021-08-21 12:17:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:51,603 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 [2021-08-21 12:17:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:51,604 INFO L225 Difference]: With dead ends: 543 [2021-08-21 12:17:51,604 INFO L226 Difference]: Without dead ends: 537 [2021-08-21 12:17:51,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-08-21 12:17:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 299. [2021-08-21 12:17:51,608 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) [2021-08-21 12:17:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 915 transitions. [2021-08-21 12:17:51,608 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 915 transitions. Word has length 18 [2021-08-21 12:17:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:51,608 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 915 transitions. [2021-08-21 12:17:51,608 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) [2021-08-21 12:17:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 915 transitions. [2021-08-21 12:17:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:51,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:51,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:51,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-08-21 12:17:51,610 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash -88534543, now seen corresponding path program 72 times [2021-08-21 12:17:51,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:51,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727924115] [2021-08-21 12:17:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:51,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:51,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:51,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727924115] [2021-08-21 12:17:51,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727924115] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:51,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:51,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:51,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989929289] [2021-08-21 12:17:51,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:51,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:51,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:51,660 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) [2021-08-21 12:17:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:51,791 INFO L93 Difference]: Finished difference Result 549 states and 1562 transitions. [2021-08-21 12:17:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:51,791 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 [2021-08-21 12:17:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:51,792 INFO L225 Difference]: With dead ends: 549 [2021-08-21 12:17:51,792 INFO L226 Difference]: Without dead ends: 549 [2021-08-21 12:17:51,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-08-21 12:17:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 297. [2021-08-21 12:17:51,796 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) [2021-08-21 12:17:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 910 transitions. [2021-08-21 12:17:51,797 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 910 transitions. Word has length 18 [2021-08-21 12:17:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:51,797 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 910 transitions. [2021-08-21 12:17:51,797 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) [2021-08-21 12:17:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 910 transitions. [2021-08-21 12:17:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:51,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:51,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:51,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-08-21 12:17:51,797 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash 951701255, now seen corresponding path program 73 times [2021-08-21 12:17:51,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:51,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101319820] [2021-08-21 12:17:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:51,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:51,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:51,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101319820] [2021-08-21 12:17:51,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101319820] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:51,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:51,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:51,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595486968] [2021-08-21 12:17:51,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:51,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:51,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:51,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:51,847 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) [2021-08-21 12:17:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:51,966 INFO L93 Difference]: Finished difference Result 553 states and 1578 transitions. [2021-08-21 12:17:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:51,966 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 [2021-08-21 12:17:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:51,967 INFO L225 Difference]: With dead ends: 553 [2021-08-21 12:17:51,967 INFO L226 Difference]: Without dead ends: 553 [2021-08-21 12:17:51,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-21 12:17:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 284. [2021-08-21 12:17:51,971 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) [2021-08-21 12:17:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-08-21 12:17:51,972 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-08-21 12:17:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:51,972 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-08-21 12:17:51,972 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) [2021-08-21 12:17:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-08-21 12:17:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:51,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:51,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:51,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-08-21 12:17:51,972 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash 676358055, now seen corresponding path program 59 times [2021-08-21 12:17:51,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:51,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450434919] [2021-08-21 12:17:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:51,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450434919] [2021-08-21 12:17:52,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450434919] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:52,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:52,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:52,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103190218] [2021-08-21 12:17:52,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:52,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:52,029 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) [2021-08-21 12:17:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:52,121 INFO L93 Difference]: Finished difference Result 432 states and 1271 transitions. [2021-08-21 12:17:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:52,122 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 [2021-08-21 12:17:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:52,122 INFO L225 Difference]: With dead ends: 432 [2021-08-21 12:17:52,122 INFO L226 Difference]: Without dead ends: 432 [2021-08-21 12:17:52,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-21 12:17:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 286. [2021-08-21 12:17:52,126 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) [2021-08-21 12:17:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-08-21 12:17:52,126 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-08-21 12:17:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:52,126 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-08-21 12:17:52,127 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) [2021-08-21 12:17:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-08-21 12:17:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:52,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:52,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:52,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-08-21 12:17:52,127 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:52,127 INFO L82 PathProgramCache]: Analyzing trace with hash -519281793, now seen corresponding path program 60 times [2021-08-21 12:17:52,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:52,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299595101] [2021-08-21 12:17:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:52,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299595101] [2021-08-21 12:17:52,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299595101] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:52,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:52,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:52,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164694729] [2021-08-21 12:17:52,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:52,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:52,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:52,186 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) [2021-08-21 12:17:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:52,293 INFO L93 Difference]: Finished difference Result 474 states and 1372 transitions. [2021-08-21 12:17:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:52,293 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 [2021-08-21 12:17:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:52,294 INFO L225 Difference]: With dead ends: 474 [2021-08-21 12:17:52,294 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:17:52,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:17:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 289. [2021-08-21 12:17:52,298 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) [2021-08-21 12:17:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 893 transitions. [2021-08-21 12:17:52,298 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 893 transitions. Word has length 18 [2021-08-21 12:17:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:52,298 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 893 transitions. [2021-08-21 12:17:52,298 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) [2021-08-21 12:17:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 893 transitions. [2021-08-21 12:17:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:52,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:52,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:52,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-08-21 12:17:52,299 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:52,299 INFO L82 PathProgramCache]: Analyzing trace with hash 259823723, now seen corresponding path program 61 times [2021-08-21 12:17:52,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:52,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169830938] [2021-08-21 12:17:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:52,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169830938] [2021-08-21 12:17:52,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169830938] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:52,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:52,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:52,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738904664] [2021-08-21 12:17:52,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:52,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:52,356 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) [2021-08-21 12:17:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:52,458 INFO L93 Difference]: Finished difference Result 441 states and 1301 transitions. [2021-08-21 12:17:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:52,458 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 [2021-08-21 12:17:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:52,459 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:17:52,459 INFO L226 Difference]: Without dead ends: 441 [2021-08-21 12:17:52,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-21 12:17:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 283. [2021-08-21 12:17:52,463 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) [2021-08-21 12:17:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 866 transitions. [2021-08-21 12:17:52,463 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 866 transitions. Word has length 18 [2021-08-21 12:17:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:52,463 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 866 transitions. [2021-08-21 12:17:52,463 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) [2021-08-21 12:17:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 866 transitions. [2021-08-21 12:17:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:52,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:52,464 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:52,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-08-21 12:17:52,464 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2085742599, now seen corresponding path program 62 times [2021-08-21 12:17:52,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:52,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725026899] [2021-08-21 12:17:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:52,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725026899] [2021-08-21 12:17:52,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725026899] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:52,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:52,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:52,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293455386] [2021-08-21 12:17:52,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:52,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:52,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:52,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:52,519 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) [2021-08-21 12:17:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:52,610 INFO L93 Difference]: Finished difference Result 446 states and 1283 transitions. [2021-08-21 12:17:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:52,611 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 [2021-08-21 12:17:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:52,611 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:17:52,611 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 12:17:52,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 12:17:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 284. [2021-08-21 12:17:52,615 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) [2021-08-21 12:17:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 868 transitions. [2021-08-21 12:17:52,615 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 868 transitions. Word has length 18 [2021-08-21 12:17:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:52,615 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 868 transitions. [2021-08-21 12:17:52,616 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) [2021-08-21 12:17:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 868 transitions. [2021-08-21 12:17:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:52,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:52,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:52,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-08-21 12:17:52,616 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1430119181, now seen corresponding path program 63 times [2021-08-21 12:17:52,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:52,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011071317] [2021-08-21 12:17:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:52,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011071317] [2021-08-21 12:17:52,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011071317] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:52,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:52,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:52,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385412501] [2021-08-21 12:17:52,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:52,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:52,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:52,672 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) [2021-08-21 12:17:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:52,794 INFO L93 Difference]: Finished difference Result 452 states and 1298 transitions. [2021-08-21 12:17:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:52,794 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 [2021-08-21 12:17:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:52,795 INFO L225 Difference]: With dead ends: 452 [2021-08-21 12:17:52,795 INFO L226 Difference]: Without dead ends: 452 [2021-08-21 12:17:52,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-21 12:17:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 281. [2021-08-21 12:17:52,798 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) [2021-08-21 12:17:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 853 transitions. [2021-08-21 12:17:52,799 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 853 transitions. Word has length 18 [2021-08-21 12:17:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:52,799 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 853 transitions. [2021-08-21 12:17:52,799 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) [2021-08-21 12:17:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 853 transitions. [2021-08-21 12:17:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:52,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:52,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:52,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-08-21 12:17:52,799 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:52,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1536150695, now seen corresponding path program 64 times [2021-08-21 12:17:52,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:52,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666141539] [2021-08-21 12:17:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:52,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666141539] [2021-08-21 12:17:52,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666141539] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:52,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:52,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:52,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932740537] [2021-08-21 12:17:52,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:52,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:52,840 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) [2021-08-21 12:17:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:52,931 INFO L93 Difference]: Finished difference Result 410 states and 1197 transitions. [2021-08-21 12:17:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:52,932 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 [2021-08-21 12:17:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:52,932 INFO L225 Difference]: With dead ends: 410 [2021-08-21 12:17:52,932 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 12:17:52,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:17:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 12:17:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 267. [2021-08-21 12:17:52,936 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) [2021-08-21 12:17:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 810 transitions. [2021-08-21 12:17:52,936 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 810 transitions. Word has length 18 [2021-08-21 12:17:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:52,936 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 810 transitions. [2021-08-21 12:17:52,936 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) [2021-08-21 12:17:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 810 transitions. [2021-08-21 12:17:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:52,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:52,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:52,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-08-21 12:17:52,937 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash 304574739, now seen corresponding path program 74 times [2021-08-21 12:17:52,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:52,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270822921] [2021-08-21 12:17:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:52,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270822921] [2021-08-21 12:17:52,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270822921] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:52,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:52,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:52,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399909842] [2021-08-21 12:17:52,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:52,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:52,984 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) [2021-08-21 12:17:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:53,101 INFO L93 Difference]: Finished difference Result 417 states and 1164 transitions. [2021-08-21 12:17:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:53,101 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 [2021-08-21 12:17:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:53,102 INFO L225 Difference]: With dead ends: 417 [2021-08-21 12:17:53,102 INFO L226 Difference]: Without dead ends: 411 [2021-08-21 12:17:53,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-08-21 12:17:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 277. [2021-08-21 12:17:53,105 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) [2021-08-21 12:17:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 837 transitions. [2021-08-21 12:17:53,106 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 837 transitions. Word has length 18 [2021-08-21 12:17:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:53,106 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 837 transitions. [2021-08-21 12:17:53,106 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) [2021-08-21 12:17:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 837 transitions. [2021-08-21 12:17:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:53,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:53,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:53,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-08-21 12:17:53,107 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash 328474653, now seen corresponding path program 75 times [2021-08-21 12:17:53,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:53,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000982331] [2021-08-21 12:17:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:53,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:53,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:53,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000982331] [2021-08-21 12:17:53,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000982331] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:53,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:53,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:53,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371442730] [2021-08-21 12:17:53,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:53,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:53,157 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) [2021-08-21 12:17:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:53,261 INFO L93 Difference]: Finished difference Result 388 states and 1110 transitions. [2021-08-21 12:17:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:53,262 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 [2021-08-21 12:17:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:53,262 INFO L225 Difference]: With dead ends: 388 [2021-08-21 12:17:53,262 INFO L226 Difference]: Without dead ends: 388 [2021-08-21 12:17:53,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:53,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-21 12:17:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 265. [2021-08-21 12:17:53,265 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) [2021-08-21 12:17:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 805 transitions. [2021-08-21 12:17:53,266 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 805 transitions. Word has length 18 [2021-08-21 12:17:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:53,266 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 805 transitions. [2021-08-21 12:17:53,266 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) [2021-08-21 12:17:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 805 transitions. [2021-08-21 12:17:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:53,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:53,266 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:53,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-08-21 12:17:53,266 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1385368165, now seen corresponding path program 76 times [2021-08-21 12:17:53,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:53,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490142408] [2021-08-21 12:17:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:53,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:53,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:53,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490142408] [2021-08-21 12:17:53,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490142408] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:53,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:53,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:53,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044772888] [2021-08-21 12:17:53,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:53,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:53,309 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) [2021-08-21 12:17:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:53,425 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-08-21 12:17:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:53,426 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 [2021-08-21 12:17:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:53,426 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:17:53,426 INFO L226 Difference]: Without dead ends: 409 [2021-08-21 12:17:53,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-21 12:17:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 277. [2021-08-21 12:17:53,430 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) [2021-08-21 12:17:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 839 transitions. [2021-08-21 12:17:53,430 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 839 transitions. Word has length 18 [2021-08-21 12:17:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:53,430 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 839 transitions. [2021-08-21 12:17:53,430 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) [2021-08-21 12:17:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 839 transitions. [2021-08-21 12:17:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:53,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:53,431 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:53,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-08-21 12:17:53,431 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:53,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1361468251, now seen corresponding path program 77 times [2021-08-21 12:17:53,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:53,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376387065] [2021-08-21 12:17:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:53,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:53,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:53,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376387065] [2021-08-21 12:17:53,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376387065] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:53,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:53,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:53,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032374540] [2021-08-21 12:17:53,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:53,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:53,477 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) [2021-08-21 12:17:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:53,584 INFO L93 Difference]: Finished difference Result 415 states and 1165 transitions. [2021-08-21 12:17:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:53,584 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 [2021-08-21 12:17:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:53,585 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:17:53,585 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:17:53,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:17:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 275. [2021-08-21 12:17:53,588 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) [2021-08-21 12:17:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 834 transitions. [2021-08-21 12:17:53,589 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 834 transitions. Word has length 18 [2021-08-21 12:17:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 834 transitions. [2021-08-21 12:17:53,589 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) [2021-08-21 12:17:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 834 transitions. [2021-08-21 12:17:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:17:53,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:53,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:53,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-08-21 12:17:53,589 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:53,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash -321232453, now seen corresponding path program 78 times [2021-08-21 12:17:53,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:53,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835009879] [2021-08-21 12:17:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:53,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:53,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:53,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835009879] [2021-08-21 12:17:53,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835009879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:17:53,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:17:53,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:17:53,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260392054] [2021-08-21 12:17:53,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:17:53,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:17:53,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:17:53,633 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) [2021-08-21 12:17:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:53,733 INFO L93 Difference]: Finished difference Result 390 states and 1115 transitions. [2021-08-21 12:17:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:17:53,733 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 [2021-08-21 12:17:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:53,734 INFO L225 Difference]: With dead ends: 390 [2021-08-21 12:17:53,734 INFO L226 Difference]: Without dead ends: 390 [2021-08-21 12:17:53,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:17:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-21 12:17:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 263. [2021-08-21 12:17:53,737 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) [2021-08-21 12:17:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 800 transitions. [2021-08-21 12:17:53,737 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 800 transitions. Word has length 18 [2021-08-21 12:17:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:53,737 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 800 transitions. [2021-08-21 12:17:53,737 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) [2021-08-21 12:17:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 800 transitions. [2021-08-21 12:17:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:53,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:53,738 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:53,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-08-21 12:17:53,738 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1378478638, now seen corresponding path program 1 times [2021-08-21 12:17:53,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:53,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942716775] [2021-08-21 12:17:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:53,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:53,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:53,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942716775] [2021-08-21 12:17:53,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942716775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:53,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664053703] [2021-08-21 12:17:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:53,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:53,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:53,937 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:53,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:17:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:54,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:17:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:54,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-21 12:17:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664053703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:55,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:55,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:17:55,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483733421] [2021-08-21 12:17:55,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:55,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:55,014 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) [2021-08-21 12:17:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:55,512 INFO L93 Difference]: Finished difference Result 440 states and 1228 transitions. [2021-08-21 12:17:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:55,512 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 [2021-08-21 12:17:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:55,513 INFO L225 Difference]: With dead ends: 440 [2021-08-21 12:17:55,513 INFO L226 Difference]: Without dead ends: 400 [2021-08-21 12:17:55,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:17:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-21 12:17:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 273. [2021-08-21 12:17:55,516 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) [2021-08-21 12:17:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 826 transitions. [2021-08-21 12:17:55,517 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 826 transitions. Word has length 19 [2021-08-21 12:17:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:55,517 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 826 transitions. [2021-08-21 12:17:55,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 826 transitions. [2021-08-21 12:17:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:55,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:55,518 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:55,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 12:17:55,718 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 [2021-08-21 12:17:55,718 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1769667174, now seen corresponding path program 2 times [2021-08-21 12:17:55,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:55,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038110570] [2021-08-21 12:17:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:55,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:55,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:55,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038110570] [2021-08-21 12:17:55,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038110570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:55,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306925581] [2021-08-21 12:17:55,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:55,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:55,901 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:55,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:17:56,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:17:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:56,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-21 12:17:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:57,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306925581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:57,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:57,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:17:57,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025557217] [2021-08-21 12:17:57,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:57,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:57,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:57,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:57,047 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) [2021-08-21 12:17:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:57,663 INFO L93 Difference]: Finished difference Result 448 states and 1266 transitions. [2021-08-21 12:17:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:17:57,663 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 [2021-08-21 12:17:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:57,664 INFO L225 Difference]: With dead ends: 448 [2021-08-21 12:17:57,664 INFO L226 Difference]: Without dead ends: 419 [2021-08-21 12:17:57,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:17:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-21 12:17:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 276. [2021-08-21 12:17:57,667 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) [2021-08-21 12:17:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 834 transitions. [2021-08-21 12:17:57,668 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 834 transitions. Word has length 19 [2021-08-21 12:17:57,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:57,668 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 834 transitions. [2021-08-21 12:17:57,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 834 transitions. [2021-08-21 12:17:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:57,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:57,668 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:57,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:57,881 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 [2021-08-21 12:17:57,881 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1263320908, now seen corresponding path program 3 times [2021-08-21 12:17:57,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:57,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167475148] [2021-08-21 12:17:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:57,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:58,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:58,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167475148] [2021-08-21 12:17:58,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167475148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:58,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389308965] [2021-08-21 12:17:58,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:58,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:58,051 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:58,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:17:58,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:17:58,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:58,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:17:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:59,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 133 [2021-08-21 12:17:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:59,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389308965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:59,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:59,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:17:59,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686078298] [2021-08-21 12:17:59,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:59,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:59,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:59,278 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) [2021-08-21 12:17:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:59,951 INFO L93 Difference]: Finished difference Result 463 states and 1294 transitions. [2021-08-21 12:17:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:17:59,952 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 [2021-08-21 12:17:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:59,952 INFO L225 Difference]: With dead ends: 463 [2021-08-21 12:17:59,952 INFO L226 Difference]: Without dead ends: 433 [2021-08-21 12:17:59,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:17:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-21 12:17:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 289. [2021-08-21 12:17:59,956 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) [2021-08-21 12:17:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 868 transitions. [2021-08-21 12:17:59,956 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 868 transitions. Word has length 19 [2021-08-21 12:17:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:59,956 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 868 transitions. [2021-08-21 12:17:59,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 868 transitions. [2021-08-21 12:17:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:17:59,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:59,957 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:59,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:00,157 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 [2021-08-21 12:18:00,157 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash 914263706, now seen corresponding path program 4 times [2021-08-21 12:18:00,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:00,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826526951] [2021-08-21 12:18:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:00,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:00,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826526951] [2021-08-21 12:18:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826526951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137783556] [2021-08-21 12:18:00,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:00,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:00,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:00,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:00,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:18:01,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:01,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:01,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:01,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:01,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137783556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:01,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:01,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:18:01,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302769561] [2021-08-21 12:18:01,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:01,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:01,704 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) [2021-08-21 12:18:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:02,589 INFO L93 Difference]: Finished difference Result 479 states and 1322 transitions. [2021-08-21 12:18:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:18:02,589 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 [2021-08-21 12:18:02,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:02,590 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:18:02,590 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 12:18:02,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 946.5ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:18:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 12:18:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 295. [2021-08-21 12:18:02,594 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) [2021-08-21 12:18:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 887 transitions. [2021-08-21 12:18:02,594 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 887 transitions. Word has length 19 [2021-08-21 12:18:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:02,594 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 887 transitions. [2021-08-21 12:18:02,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 887 transitions. [2021-08-21 12:18:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:02,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:02,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:02,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:02,795 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 [2021-08-21 12:18:02,795 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:02,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1231907054, now seen corresponding path program 5 times [2021-08-21 12:18:02,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:02,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061706059] [2021-08-21 12:18:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:02,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:02,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:02,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061706059] [2021-08-21 12:18:02,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061706059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:02,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156735875] [2021-08-21 12:18:02,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:02,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:02,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:02,947 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:02,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:18:03,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:18:03,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:03,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:03,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:03,849 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 134 treesize of output 108 [2021-08-21 12:18:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:04,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156735875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:04,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:04,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 12:18:04,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937582877] [2021-08-21 12:18:04,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:04,180 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) [2021-08-21 12:18:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:04,816 INFO L93 Difference]: Finished difference Result 462 states and 1306 transitions. [2021-08-21 12:18:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:18:04,816 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 [2021-08-21 12:18:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:04,817 INFO L225 Difference]: With dead ends: 462 [2021-08-21 12:18:04,817 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 12:18:04,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 641.0ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:18:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 12:18:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 304. [2021-08-21 12:18:04,820 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) [2021-08-21 12:18:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-08-21 12:18:04,821 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 19 [2021-08-21 12:18:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:04,821 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-08-21 12:18:04,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-08-21 12:18:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:04,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:04,821 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:04,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:05,021 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 [2021-08-21 12:18:05,022 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash 377522628, now seen corresponding path program 6 times [2021-08-21 12:18:05,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:05,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028720815] [2021-08-21 12:18:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:05,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:05,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:05,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028720815] [2021-08-21 12:18:05,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028720815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:05,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638219690] [2021-08-21 12:18:05,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:05,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:05,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:05,165 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:05,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:18:05,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:18:05,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:05,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:06,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-21 12:18:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:06,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638219690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:06,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:06,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:18:06,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668105152] [2021-08-21 12:18:06,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:06,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:06,455 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) [2021-08-21 12:18:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:06,964 INFO L93 Difference]: Finished difference Result 439 states and 1254 transitions. [2021-08-21 12:18:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:18:06,964 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 [2021-08-21 12:18:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:06,965 INFO L225 Difference]: With dead ends: 439 [2021-08-21 12:18:06,965 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 12:18:06,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 518.3ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 12:18:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 313. [2021-08-21 12:18:06,968 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) [2021-08-21 12:18:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-08-21 12:18:06,969 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 19 [2021-08-21 12:18:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:06,969 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-08-21 12:18:06,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-08-21 12:18:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:06,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:06,970 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:06,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:07,170 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 [2021-08-21 12:18:07,170 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash 28465426, now seen corresponding path program 7 times [2021-08-21 12:18:07,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:07,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489996303] [2021-08-21 12:18:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:07,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:07,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:07,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489996303] [2021-08-21 12:18:07,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489996303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:07,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981991040] [2021-08-21 12:18:07,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:07,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:07,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:07,354 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:07,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:18:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:08,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 149 [2021-08-21 12:18:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:08,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981991040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:08,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:08,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:18:08,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129214904] [2021-08-21 12:18:08,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:08,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:08,789 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) [2021-08-21 12:18:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:09,436 INFO L93 Difference]: Finished difference Result 463 states and 1302 transitions. [2021-08-21 12:18:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:18:09,437 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 [2021-08-21 12:18:09,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:09,437 INFO L225 Difference]: With dead ends: 463 [2021-08-21 12:18:09,437 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 12:18:09,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:18:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 12:18:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 313. [2021-08-21 12:18:09,441 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) [2021-08-21 12:18:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-08-21 12:18:09,441 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 19 [2021-08-21 12:18:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:09,441 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-08-21 12:18:09,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-08-21 12:18:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:09,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:09,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:09,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:09,642 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 [2021-08-21 12:18:09,642 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2117705334, now seen corresponding path program 8 times [2021-08-21 12:18:09,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:09,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965035027] [2021-08-21 12:18:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:09,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:09,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965035027] [2021-08-21 12:18:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965035027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609976463] [2021-08-21 12:18:09,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:09,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:09,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:09,823 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:09,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:18:10,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:10,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:10,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:10,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:10,891 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 134 treesize of output 108 [2021-08-21 12:18:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:11,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609976463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:11,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:11,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:18:11,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312169205] [2021-08-21 12:18:11,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:11,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:11,164 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) [2021-08-21 12:18:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:12,157 INFO L93 Difference]: Finished difference Result 516 states and 1434 transitions. [2021-08-21 12:18:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:18:12,158 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 [2021-08-21 12:18:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:12,158 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:18:12,158 INFO L226 Difference]: Without dead ends: 471 [2021-08-21 12:18:12,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 991.0ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:18:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-21 12:18:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 319. [2021-08-21 12:18:12,169 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) [2021-08-21 12:18:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 960 transitions. [2021-08-21 12:18:12,170 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 960 transitions. Word has length 19 [2021-08-21 12:18:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:12,170 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 960 transitions. [2021-08-21 12:18:12,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 960 transitions. [2021-08-21 12:18:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:12,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:12,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:12,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:12,371 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 [2021-08-21 12:18:12,371 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:12,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1529960012, now seen corresponding path program 9 times [2021-08-21 12:18:12,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:12,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949494393] [2021-08-21 12:18:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:12,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:12,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:12,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949494393] [2021-08-21 12:18:12,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949494393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:12,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382557897] [2021-08-21 12:18:12,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:12,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:12,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:12,559 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:12,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:18:13,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:18:13,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:13,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:14,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382557897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:14,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:14,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 12:18:14,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722113239] [2021-08-21 12:18:14,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:14,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:14,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:14,006 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) [2021-08-21 12:18:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:14,860 INFO L93 Difference]: Finished difference Result 591 states and 1629 transitions. [2021-08-21 12:18:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:18:14,860 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 [2021-08-21 12:18:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:14,861 INFO L225 Difference]: With dead ends: 591 [2021-08-21 12:18:14,861 INFO L226 Difference]: Without dead ends: 561 [2021-08-21 12:18:14,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 907.4ms TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:18:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-21 12:18:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 331. [2021-08-21 12:18:14,866 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) [2021-08-21 12:18:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1010 transitions. [2021-08-21 12:18:14,866 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1010 transitions. Word has length 19 [2021-08-21 12:18:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:14,866 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1010 transitions. [2021-08-21 12:18:14,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1010 transitions. [2021-08-21 12:18:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:14,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:14,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:14,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:15,067 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 [2021-08-21 12:18:15,068 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash -647882578, now seen corresponding path program 10 times [2021-08-21 12:18:15,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:15,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599652086] [2021-08-21 12:18:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:15,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:15,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:15,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599652086] [2021-08-21 12:18:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599652086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:15,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961496059] [2021-08-21 12:18:15,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:15,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:15,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:15,250 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:15,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:18:16,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:16,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:16,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:16,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:16,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961496059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:16,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:16,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:18:16,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565158522] [2021-08-21 12:18:16,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:16,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:16,804 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) [2021-08-21 12:18:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:17,318 INFO L93 Difference]: Finished difference Result 516 states and 1459 transitions. [2021-08-21 12:18:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:17,318 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 [2021-08-21 12:18:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:17,319 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:18:17,319 INFO L226 Difference]: Without dead ends: 489 [2021-08-21 12:18:17,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:18:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-21 12:18:17,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 331. [2021-08-21 12:18:17,323 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) [2021-08-21 12:18:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1007 transitions. [2021-08-21 12:18:17,323 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1007 transitions. Word has length 19 [2021-08-21 12:18:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:17,323 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1007 transitions. [2021-08-21 12:18:17,323 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) [2021-08-21 12:18:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1007 transitions. [2021-08-21 12:18:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:17,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:17,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:17,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 12:18:17,525 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 [2021-08-21 12:18:17,525 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:17,526 INFO L82 PathProgramCache]: Analyzing trace with hash 427828578, now seen corresponding path program 11 times [2021-08-21 12:18:17,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:17,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879801606] [2021-08-21 12:18:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:17,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:17,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:17,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879801606] [2021-08-21 12:18:17,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879801606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:17,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734546174] [2021-08-21 12:18:17,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:17,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:17,731 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:17,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:18:18,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:18,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:19,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734546174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:19,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:19,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 12:18:19,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920253920] [2021-08-21 12:18:19,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:19,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:19,232 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) [2021-08-21 12:18:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:19,651 INFO L93 Difference]: Finished difference Result 510 states and 1443 transitions. [2021-08-21 12:18:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:19,651 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 [2021-08-21 12:18:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:19,652 INFO L225 Difference]: With dead ends: 510 [2021-08-21 12:18:19,652 INFO L226 Difference]: Without dead ends: 477 [2021-08-21 12:18:19,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:18:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-08-21 12:18:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 331. [2021-08-21 12:18:19,656 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) [2021-08-21 12:18:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1004 transitions. [2021-08-21 12:18:19,657 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1004 transitions. Word has length 19 [2021-08-21 12:18:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:19,657 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 1004 transitions. [2021-08-21 12:18:19,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1004 transitions. [2021-08-21 12:18:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:19,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:19,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:19,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:19,859 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 [2021-08-21 12:18:19,859 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash -30499761, now seen corresponding path program 1 times [2021-08-21 12:18:19,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:19,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178234210] [2021-08-21 12:18:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:19,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:18:19,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:19,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178234210] [2021-08-21 12:18:19,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178234210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:19,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592513207] [2021-08-21 12:18:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:19,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:19,891 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:19,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:18:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:18:20,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:18:21,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592513207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:21,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:21,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:18:21,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519871744] [2021-08-21 12:18:21,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:18:21,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:18:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:18:21,076 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) [2021-08-21 12:18:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:21,143 INFO L93 Difference]: Finished difference Result 545 states and 1605 transitions. [2021-08-21 12:18:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:18:21,144 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 [2021-08-21 12:18:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:21,145 INFO L225 Difference]: With dead ends: 545 [2021-08-21 12:18:21,145 INFO L226 Difference]: Without dead ends: 441 [2021-08-21 12:18:21,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:18:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-08-21 12:18:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 375. [2021-08-21 12:18:21,149 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) [2021-08-21 12:18:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1144 transitions. [2021-08-21 12:18:21,149 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1144 transitions. Word has length 19 [2021-08-21 12:18:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:21,149 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1144 transitions. [2021-08-21 12:18:21,149 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) [2021-08-21 12:18:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1144 transitions. [2021-08-21 12:18:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:21,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:21,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:21,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:21,350 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 [2021-08-21 12:18:21,351 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1773562618, now seen corresponding path program 12 times [2021-08-21 12:18:21,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:21,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762608272] [2021-08-21 12:18:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:21,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:21,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:21,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762608272] [2021-08-21 12:18:21,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762608272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:21,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346064110] [2021-08-21 12:18:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:21,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:21,529 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:21,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:18:22,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:18:22,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:22,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:23,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346064110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:23,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:23,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:23,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563954743] [2021-08-21 12:18:23,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:23,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:23,111 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) [2021-08-21 12:18:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:24,151 INFO L93 Difference]: Finished difference Result 670 states and 1887 transitions. [2021-08-21 12:18:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:18:24,151 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 [2021-08-21 12:18:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:24,152 INFO L225 Difference]: With dead ends: 670 [2021-08-21 12:18:24,152 INFO L226 Difference]: Without dead ends: 623 [2021-08-21 12:18:24,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1026.9ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:18:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-08-21 12:18:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 382. [2021-08-21 12:18:24,157 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) [2021-08-21 12:18:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1167 transitions. [2021-08-21 12:18:24,157 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1167 transitions. Word has length 19 [2021-08-21 12:18:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:24,158 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1167 transitions. [2021-08-21 12:18:24,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1167 transitions. [2021-08-21 12:18:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:24,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:24,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:24,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:24,358 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 [2021-08-21 12:18:24,359 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:24,359 INFO L82 PathProgramCache]: Analyzing trace with hash 120394868, now seen corresponding path program 13 times [2021-08-21 12:18:24,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:24,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291160716] [2021-08-21 12:18:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:24,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:24,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:24,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291160716] [2021-08-21 12:18:24,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291160716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:24,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960363397] [2021-08-21 12:18:24,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:24,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:24,554 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:24,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:18:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:25,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:25,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:26,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960363397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:26,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:26,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:26,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299024386] [2021-08-21 12:18:26,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:26,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:26,208 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) [2021-08-21 12:18:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:26,856 INFO L93 Difference]: Finished difference Result 633 states and 1776 transitions. [2021-08-21 12:18:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:18:26,856 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 [2021-08-21 12:18:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:26,857 INFO L225 Difference]: With dead ends: 633 [2021-08-21 12:18:26,857 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 12:18:26,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 685.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:18:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 12:18:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 388. [2021-08-21 12:18:26,862 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) [2021-08-21 12:18:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1183 transitions. [2021-08-21 12:18:26,863 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1183 transitions. Word has length 19 [2021-08-21 12:18:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:26,863 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1183 transitions. [2021-08-21 12:18:26,863 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) [2021-08-21 12:18:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1183 transitions. [2021-08-21 12:18:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:26,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:26,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:26,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:27,064 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 [2021-08-21 12:18:27,064 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -228662334, now seen corresponding path program 14 times [2021-08-21 12:18:27,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:27,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972880741] [2021-08-21 12:18:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:27,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:27,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:27,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972880741] [2021-08-21 12:18:27,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972880741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:27,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139044034] [2021-08-21 12:18:27,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:27,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:27,229 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:27,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:18:28,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:28,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:28,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:28,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-21 12:18:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:28,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139044034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:28,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:28,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:28,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975136331] [2021-08-21 12:18:28,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:28,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:28,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:28,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:28,971 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) [2021-08-21 12:18:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:29,712 INFO L93 Difference]: Finished difference Result 630 states and 1779 transitions. [2021-08-21 12:18:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:18:29,713 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 [2021-08-21 12:18:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:29,714 INFO L225 Difference]: With dead ends: 630 [2021-08-21 12:18:29,714 INFO L226 Difference]: Without dead ends: 615 [2021-08-21 12:18:29,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:18:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-21 12:18:29,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 385. [2021-08-21 12:18:29,718 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) [2021-08-21 12:18:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1175 transitions. [2021-08-21 12:18:29,719 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1175 transitions. Word has length 19 [2021-08-21 12:18:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:29,719 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1175 transitions. [2021-08-21 12:18:29,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1175 transitions. [2021-08-21 12:18:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:29,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:29,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:29,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 12:18:29,920 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 [2021-08-21 12:18:29,920 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:29,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1920134202, now seen corresponding path program 15 times [2021-08-21 12:18:29,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:29,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136447805] [2021-08-21 12:18:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:29,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:30,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:30,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136447805] [2021-08-21 12:18:30,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136447805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:30,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801389232] [2021-08-21 12:18:30,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:30,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:30,081 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:30,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:18:31,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:18:31,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:31,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801389232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:31,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:31,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:18:31,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391103880] [2021-08-21 12:18:31,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:31,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:31,906 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) [2021-08-21 12:18:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:32,570 INFO L93 Difference]: Finished difference Result 573 states and 1646 transitions. [2021-08-21 12:18:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:18:32,571 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 [2021-08-21 12:18:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:32,572 INFO L225 Difference]: With dead ends: 573 [2021-08-21 12:18:32,572 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 12:18:32,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:18:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 12:18:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 385. [2021-08-21 12:18:32,576 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) [2021-08-21 12:18:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1175 transitions. [2021-08-21 12:18:32,576 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1175 transitions. Word has length 19 [2021-08-21 12:18:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:32,577 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1175 transitions. [2021-08-21 12:18:32,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1175 transitions. [2021-08-21 12:18:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:32,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:32,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:32,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:32,777 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 [2021-08-21 12:18:32,778 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:32,778 INFO L82 PathProgramCache]: Analyzing trace with hash 811329456, now seen corresponding path program 16 times [2021-08-21 12:18:32,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:32,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292379631] [2021-08-21 12:18:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:32,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:33,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:33,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292379631] [2021-08-21 12:18:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292379631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:33,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457426152] [2021-08-21 12:18:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:33,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:33,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:33,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:18:34,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:34,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:34,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:34,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:34,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457426152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:34,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:34,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:34,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100785230] [2021-08-21 12:18:34,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:34,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:34,865 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) [2021-08-21 12:18:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:35,462 INFO L93 Difference]: Finished difference Result 697 states and 1960 transitions. [2021-08-21 12:18:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:35,463 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 [2021-08-21 12:18:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:35,464 INFO L225 Difference]: With dead ends: 697 [2021-08-21 12:18:35,464 INFO L226 Difference]: Without dead ends: 657 [2021-08-21 12:18:35,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 690.6ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-21 12:18:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 392. [2021-08-21 12:18:35,469 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) [2021-08-21 12:18:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1198 transitions. [2021-08-21 12:18:35,470 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1198 transitions. Word has length 19 [2021-08-21 12:18:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:35,470 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1198 transitions. [2021-08-21 12:18:35,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1198 transitions. [2021-08-21 12:18:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:35,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:35,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:35,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:35,671 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 [2021-08-21 12:18:35,671 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -335492028, now seen corresponding path program 17 times [2021-08-21 12:18:35,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:35,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218596997] [2021-08-21 12:18:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:35,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:35,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:35,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218596997] [2021-08-21 12:18:35,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218596997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:35,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707410750] [2021-08-21 12:18:35,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:35,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:35,877 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:35,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:18:37,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:18:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:37,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:37,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707410750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:37,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:37,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:37,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110456983] [2021-08-21 12:18:37,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:37,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:37,954 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) [2021-08-21 12:18:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:38,619 INFO L93 Difference]: Finished difference Result 665 states and 1895 transitions. [2021-08-21 12:18:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:38,619 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 [2021-08-21 12:18:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:38,620 INFO L225 Difference]: With dead ends: 665 [2021-08-21 12:18:38,620 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 12:18:38,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 743.7ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 12:18:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 395. [2021-08-21 12:18:38,625 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) [2021-08-21 12:18:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1206 transitions. [2021-08-21 12:18:38,626 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1206 transitions. Word has length 19 [2021-08-21 12:18:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:38,626 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1206 transitions. [2021-08-21 12:18:38,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1206 transitions. [2021-08-21 12:18:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:38,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:38,627 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:38,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 12:18:38,827 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 [2021-08-21 12:18:38,828 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash -684549230, now seen corresponding path program 18 times [2021-08-21 12:18:38,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:38,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624975315] [2021-08-21 12:18:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:38,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:39,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:39,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624975315] [2021-08-21 12:18:39,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624975315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:39,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145784795] [2021-08-21 12:18:39,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:39,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:39,043 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:39,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:18:40,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:18:40,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:40,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:40,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-21 12:18:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:41,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145784795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:41,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:41,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:41,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504475193] [2021-08-21 12:18:41,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:41,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:41,094 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) [2021-08-21 12:18:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:42,228 INFO L93 Difference]: Finished difference Result 729 states and 2052 transitions. [2021-08-21 12:18:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:18:42,229 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 [2021-08-21 12:18:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:42,230 INFO L225 Difference]: With dead ends: 729 [2021-08-21 12:18:42,230 INFO L226 Difference]: Without dead ends: 685 [2021-08-21 12:18:42,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1152.4ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:18:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-21 12:18:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 402. [2021-08-21 12:18:42,235 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) [2021-08-21 12:18:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1222 transitions. [2021-08-21 12:18:42,235 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1222 transitions. Word has length 19 [2021-08-21 12:18:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:42,236 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1222 transitions. [2021-08-21 12:18:42,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1222 transitions. [2021-08-21 12:18:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:42,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:42,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:42,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:42,436 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 [2021-08-21 12:18:42,437 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash -297463948, now seen corresponding path program 19 times [2021-08-21 12:18:42,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:42,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088523566] [2021-08-21 12:18:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:42,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:42,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:42,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088523566] [2021-08-21 12:18:42,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088523566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:42,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810647487] [2021-08-21 12:18:42,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:42,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:42,646 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:42,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:18:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:44,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-21 12:18:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:44,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810647487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:44,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:44,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:44,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148925778] [2021-08-21 12:18:44,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:44,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:44,793 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) [2021-08-21 12:18:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:45,950 INFO L93 Difference]: Finished difference Result 628 states and 1802 transitions. [2021-08-21 12:18:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:45,951 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 [2021-08-21 12:18:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:45,952 INFO L225 Difference]: With dead ends: 628 [2021-08-21 12:18:45,952 INFO L226 Difference]: Without dead ends: 599 [2021-08-21 12:18:45,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1237.5ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-08-21 12:18:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 404. [2021-08-21 12:18:45,956 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) [2021-08-21 12:18:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1229 transitions. [2021-08-21 12:18:45,957 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1229 transitions. Word has length 19 [2021-08-21 12:18:45,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:45,957 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1229 transitions. [2021-08-21 12:18:45,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1229 transitions. [2021-08-21 12:18:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:45,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:45,957 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:45,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:46,171 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 [2021-08-21 12:18:46,172 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash 771773518, now seen corresponding path program 20 times [2021-08-21 12:18:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:46,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953819800] [2021-08-21 12:18:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:46,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:46,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:46,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953819800] [2021-08-21 12:18:46,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953819800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:46,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131439999] [2021-08-21 12:18:46,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:46,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:46,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:46,377 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:46,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:18:47,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:47,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:48,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 132 [2021-08-21 12:18:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:48,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131439999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:48,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:48,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:48,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768039878] [2021-08-21 12:18:48,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:48,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:48,680 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) [2021-08-21 12:18:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:51,147 INFO L93 Difference]: Finished difference Result 784 states and 2220 transitions. [2021-08-21 12:18:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:18:51,147 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 [2021-08-21 12:18:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:51,149 INFO L225 Difference]: With dead ends: 784 [2021-08-21 12:18:51,149 INFO L226 Difference]: Without dead ends: 740 [2021-08-21 12:18:51,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2430.1ms TimeCoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:18:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-08-21 12:18:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 406. [2021-08-21 12:18:51,154 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) [2021-08-21 12:18:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1243 transitions. [2021-08-21 12:18:51,155 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1243 transitions. Word has length 19 [2021-08-21 12:18:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:51,155 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1243 transitions. [2021-08-21 12:18:51,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1243 transitions. [2021-08-21 12:18:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:51,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:51,156 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:51,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:51,356 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 [2021-08-21 12:18:51,356 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash 866820340, now seen corresponding path program 21 times [2021-08-21 12:18:51,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:51,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721169252] [2021-08-21 12:18:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:51,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:51,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:51,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721169252] [2021-08-21 12:18:51,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721169252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:51,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065487523] [2021-08-21 12:18:51,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:51,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:51,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:51,588 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:51,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:18:53,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:18:53,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:53,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:53,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:53,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065487523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:53,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:53,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851826851] [2021-08-21 12:18:53,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:53,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:53,803 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) [2021-08-21 12:18:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:54,608 INFO L93 Difference]: Finished difference Result 667 states and 1933 transitions. [2021-08-21 12:18:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:18:54,608 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 [2021-08-21 12:18:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:54,609 INFO L225 Difference]: With dead ends: 667 [2021-08-21 12:18:54,609 INFO L226 Difference]: Without dead ends: 638 [2021-08-21 12:18:54,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:18:54,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-21 12:18:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 406. [2021-08-21 12:18:54,614 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) [2021-08-21 12:18:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1243 transitions. [2021-08-21 12:18:54,615 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1243 transitions. Word has length 19 [2021-08-21 12:18:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:54,615 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1243 transitions. [2021-08-21 12:18:54,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1243 transitions. [2021-08-21 12:18:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:54,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:54,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:54,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:54,816 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 [2021-08-21 12:18:54,817 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1262627388, now seen corresponding path program 22 times [2021-08-21 12:18:54,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:54,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505479894] [2021-08-21 12:18:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:54,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:54,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:54,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505479894] [2021-08-21 12:18:54,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505479894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:54,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729191416] [2021-08-21 12:18:54,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:54,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:54,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:54,989 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:54,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:18:56,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:56,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:18:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:18:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729191416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:57,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:57,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:18:57,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631205953] [2021-08-21 12:18:57,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:57,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:57,205 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) [2021-08-21 12:18:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:57,806 INFO L93 Difference]: Finished difference Result 614 states and 1752 transitions. [2021-08-21 12:18:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:18:57,807 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 [2021-08-21 12:18:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:57,808 INFO L225 Difference]: With dead ends: 614 [2021-08-21 12:18:57,808 INFO L226 Difference]: Without dead ends: 585 [2021-08-21 12:18:57,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 652.7ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:18:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-21 12:18:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 413. [2021-08-21 12:18:57,812 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) [2021-08-21 12:18:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1265 transitions. [2021-08-21 12:18:57,813 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1265 transitions. Word has length 19 [2021-08-21 12:18:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:57,813 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1265 transitions. [2021-08-21 12:18:57,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:57,813 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1265 transitions. [2021-08-21 12:18:57,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:18:57,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:57,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:57,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:58,014 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 [2021-08-21 12:18:58,014 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1611684590, now seen corresponding path program 23 times [2021-08-21 12:18:58,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:58,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292188118] [2021-08-21 12:18:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:58,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:58,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:58,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292188118] [2021-08-21 12:18:58,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292188118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:58,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69249751] [2021-08-21 12:18:58,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:58,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:58,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:58,214 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:58,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:18:59,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:59,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:00,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 135 [2021-08-21 12:19:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:00,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69249751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:00,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:00,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:00,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442554108] [2021-08-21 12:19:00,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:00,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:00,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:00,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:00,511 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) [2021-08-21 12:19:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:01,362 INFO L93 Difference]: Finished difference Result 662 states and 1857 transitions. [2021-08-21 12:19:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:19:01,362 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 [2021-08-21 12:19:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:01,363 INFO L225 Difference]: With dead ends: 662 [2021-08-21 12:19:01,363 INFO L226 Difference]: Without dead ends: 632 [2021-08-21 12:19:01,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 897.8ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:19:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-08-21 12:19:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 416. [2021-08-21 12:19:01,368 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) [2021-08-21 12:19:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1276 transitions. [2021-08-21 12:19:01,369 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1276 transitions. Word has length 19 [2021-08-21 12:19:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:01,369 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1276 transitions. [2021-08-21 12:19:01,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1276 transitions. [2021-08-21 12:19:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:01,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:01,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:01,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:01,570 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 [2021-08-21 12:19:01,570 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:01,570 INFO L82 PathProgramCache]: Analyzing trace with hash 537111946, now seen corresponding path program 24 times [2021-08-21 12:19:01,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:01,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482657587] [2021-08-21 12:19:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:01,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:01,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:01,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482657587] [2021-08-21 12:19:01,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482657587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:01,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828778225] [2021-08-21 12:19:01,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:01,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:01,760 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:01,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:19:03,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:19:03,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:03,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:03,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-21 12:19:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:04,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828778225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:04,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:04,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:04,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882578381] [2021-08-21 12:19:04,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:04,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:04,129 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) [2021-08-21 12:19:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:04,902 INFO L93 Difference]: Finished difference Result 626 states and 1791 transitions. [2021-08-21 12:19:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:19:04,903 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 [2021-08-21 12:19:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:04,904 INFO L225 Difference]: With dead ends: 626 [2021-08-21 12:19:04,904 INFO L226 Difference]: Without dead ends: 583 [2021-08-21 12:19:04,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 833.0ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:19:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-08-21 12:19:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 422. [2021-08-21 12:19:04,908 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) [2021-08-21 12:19:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1295 transitions. [2021-08-21 12:19:04,909 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1295 transitions. Word has length 19 [2021-08-21 12:19:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:04,909 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1295 transitions. [2021-08-21 12:19:04,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1295 transitions. [2021-08-21 12:19:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:04,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:04,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:04,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 12:19:05,110 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 [2021-08-21 12:19:05,110 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash 230353486, now seen corresponding path program 25 times [2021-08-21 12:19:05,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:05,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983360140] [2021-08-21 12:19:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:05,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:05,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:05,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983360140] [2021-08-21 12:19:05,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983360140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:05,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855119709] [2021-08-21 12:19:05,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:05,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:05,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:05,355 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:05,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:19:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:07,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:07,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:07,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855119709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:07,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:07,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:07,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133372953] [2021-08-21 12:19:07,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:07,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:07,919 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) [2021-08-21 12:19:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:08,594 INFO L93 Difference]: Finished difference Result 586 states and 1700 transitions. [2021-08-21 12:19:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:08,595 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 [2021-08-21 12:19:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:08,596 INFO L225 Difference]: With dead ends: 586 [2021-08-21 12:19:08,596 INFO L226 Difference]: Without dead ends: 557 [2021-08-21 12:19:08,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 791.7ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:19:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-21 12:19:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 426. [2021-08-21 12:19:08,606 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) [2021-08-21 12:19:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1309 transitions. [2021-08-21 12:19:08,606 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1309 transitions. Word has length 19 [2021-08-21 12:19:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:08,607 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1309 transitions. [2021-08-21 12:19:08,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1309 transitions. [2021-08-21 12:19:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:08,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:08,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:08,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:08,808 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 [2021-08-21 12:19:08,808 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -118703716, now seen corresponding path program 26 times [2021-08-21 12:19:08,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:08,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979374752] [2021-08-21 12:19:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:08,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:09,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:09,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979374752] [2021-08-21 12:19:09,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979374752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:09,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984578480] [2021-08-21 12:19:09,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:09,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:09,034 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:09,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:19:10,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:10,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:11,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:11,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984578480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:11,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:11,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:11,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850352390] [2021-08-21 12:19:11,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:11,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:11,579 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) [2021-08-21 12:19:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:12,384 INFO L93 Difference]: Finished difference Result 650 states and 1857 transitions. [2021-08-21 12:19:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:19:12,385 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 [2021-08-21 12:19:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:12,386 INFO L225 Difference]: With dead ends: 650 [2021-08-21 12:19:12,386 INFO L226 Difference]: Without dead ends: 606 [2021-08-21 12:19:12,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 835.0ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:19:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-08-21 12:19:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 425. [2021-08-21 12:19:12,390 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) [2021-08-21 12:19:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1310 transitions. [2021-08-21 12:19:12,391 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1310 transitions. Word has length 19 [2021-08-21 12:19:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:12,391 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1310 transitions. [2021-08-21 12:19:12,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1310 transitions. [2021-08-21 12:19:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:12,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:12,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:12,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:12,592 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 [2021-08-21 12:19:12,593 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1216369290, now seen corresponding path program 27 times [2021-08-21 12:19:12,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:12,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781413961] [2021-08-21 12:19:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:12,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:12,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:12,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781413961] [2021-08-21 12:19:12,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781413961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:12,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760027096] [2021-08-21 12:19:12,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:12,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:12,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:12,796 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:12,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:19:14,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:19:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:15,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:15,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760027096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:15,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:15,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:15,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283540483] [2021-08-21 12:19:15,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:15,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:15,570 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) [2021-08-21 12:19:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:16,441 INFO L93 Difference]: Finished difference Result 609 states and 1803 transitions. [2021-08-21 12:19:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:19:16,442 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 [2021-08-21 12:19:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:16,443 INFO L225 Difference]: With dead ends: 609 [2021-08-21 12:19:16,443 INFO L226 Difference]: Without dead ends: 594 [2021-08-21 12:19:16,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 854.2ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:19:16,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-21 12:19:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 425. [2021-08-21 12:19:16,447 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) [2021-08-21 12:19:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1310 transitions. [2021-08-21 12:19:16,448 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1310 transitions. Word has length 19 [2021-08-21 12:19:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:16,448 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1310 transitions. [2021-08-21 12:19:16,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1310 transitions. [2021-08-21 12:19:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:16,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:16,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:16,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:16,649 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 [2021-08-21 12:19:16,649 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash -221592246, now seen corresponding path program 28 times [2021-08-21 12:19:16,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:16,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554918721] [2021-08-21 12:19:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:16,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:16,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:16,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554918721] [2021-08-21 12:19:16,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554918721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:16,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193826488] [2021-08-21 12:19:16,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:16,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:16,877 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:16,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:19:18,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:18,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:19,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:19,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193826488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:19,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:19,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:19,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129447798] [2021-08-21 12:19:19,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:19,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:19,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:19,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:19,764 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) [2021-08-21 12:19:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:20,381 INFO L93 Difference]: Finished difference Result 652 states and 1889 transitions. [2021-08-21 12:19:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:20,382 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 [2021-08-21 12:19:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:20,383 INFO L225 Difference]: With dead ends: 652 [2021-08-21 12:19:20,383 INFO L226 Difference]: Without dead ends: 624 [2021-08-21 12:19:20,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 747.6ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:19:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-08-21 12:19:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 433. [2021-08-21 12:19:20,388 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) [2021-08-21 12:19:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1342 transitions. [2021-08-21 12:19:20,389 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1342 transitions. Word has length 19 [2021-08-21 12:19:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:20,389 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1342 transitions. [2021-08-21 12:19:20,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1342 transitions. [2021-08-21 12:19:20,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:20,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:20,390 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:20,592 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 [2021-08-21 12:19:20,593 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash 772783374, now seen corresponding path program 29 times [2021-08-21 12:19:20,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:20,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002339249] [2021-08-21 12:19:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:20,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:20,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:20,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002339249] [2021-08-21 12:19:20,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002339249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:20,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195768921] [2021-08-21 12:19:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:20,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:20,825 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:20,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:19:22,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:22,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:22,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:22,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:23,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 105 [2021-08-21 12:19:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:23,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195768921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:23,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:23,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:23,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951886381] [2021-08-21 12:19:23,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:23,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:23,537 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) [2021-08-21 12:19:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:24,250 INFO L93 Difference]: Finished difference Result 616 states and 1803 transitions. [2021-08-21 12:19:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:19:24,250 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 [2021-08-21 12:19:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:24,251 INFO L225 Difference]: With dead ends: 616 [2021-08-21 12:19:24,251 INFO L226 Difference]: Without dead ends: 601 [2021-08-21 12:19:24,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 751.8ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:19:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-21 12:19:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-08-21 12:19:24,256 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) [2021-08-21 12:19:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1324 transitions. [2021-08-21 12:19:24,256 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1324 transitions. Word has length 19 [2021-08-21 12:19:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:24,257 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1324 transitions. [2021-08-21 12:19:24,257 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) [2021-08-21 12:19:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1324 transitions. [2021-08-21 12:19:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:24,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:24,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:24,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:24,458 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 [2021-08-21 12:19:24,458 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1642534812, now seen corresponding path program 30 times [2021-08-21 12:19:24,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:24,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266742973] [2021-08-21 12:19:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:24,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:24,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:24,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266742973] [2021-08-21 12:19:24,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266742973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:24,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189619451] [2021-08-21 12:19:24,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:24,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:24,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:24,667 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:24,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:19:26,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:19:26,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:26,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:27,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:27,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189619451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:27,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:27,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:27,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809143037] [2021-08-21 12:19:27,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:27,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:27,612 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) [2021-08-21 12:19:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:28,327 INFO L93 Difference]: Finished difference Result 647 states and 1868 transitions. [2021-08-21 12:19:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:19:28,327 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 [2021-08-21 12:19:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:28,328 INFO L225 Difference]: With dead ends: 647 [2021-08-21 12:19:28,328 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 12:19:28,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 786.8ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:19:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 12:19:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 438. [2021-08-21 12:19:28,333 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) [2021-08-21 12:19:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1358 transitions. [2021-08-21 12:19:28,334 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1358 transitions. Word has length 19 [2021-08-21 12:19:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:28,334 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1358 transitions. [2021-08-21 12:19:28,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1358 transitions. [2021-08-21 12:19:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:28,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:28,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:28,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:28,535 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 [2021-08-21 12:19:28,535 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:28,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:28,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1911535150, now seen corresponding path program 31 times [2021-08-21 12:19:28,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:28,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121155752] [2021-08-21 12:19:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:28,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:28,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:28,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121155752] [2021-08-21 12:19:28,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121155752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:28,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219606162] [2021-08-21 12:19:28,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:28,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:28,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:28,781 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:28,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:19:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:31,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:31,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219606162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:31,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:31,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:31,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666717483] [2021-08-21 12:19:31,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:31,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:31,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:31,832 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) [2021-08-21 12:19:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:33,462 INFO L93 Difference]: Finished difference Result 861 states and 2358 transitions. [2021-08-21 12:19:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:19:33,462 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 [2021-08-21 12:19:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:33,464 INFO L225 Difference]: With dead ends: 861 [2021-08-21 12:19:33,464 INFO L226 Difference]: Without dead ends: 768 [2021-08-21 12:19:33,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1689.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:19:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-08-21 12:19:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 449. [2021-08-21 12:19:33,470 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) [2021-08-21 12:19:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1402 transitions. [2021-08-21 12:19:33,470 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1402 transitions. Word has length 19 [2021-08-21 12:19:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:33,470 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1402 transitions. [2021-08-21 12:19:33,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1402 transitions. [2021-08-21 12:19:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:33,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:33,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:33,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:33,671 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 [2021-08-21 12:19:33,672 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash -927909846, now seen corresponding path program 32 times [2021-08-21 12:19:33,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:33,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473968160] [2021-08-21 12:19:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:33,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:33,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:33,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473968160] [2021-08-21 12:19:33,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473968160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:33,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869922551] [2021-08-21 12:19:33,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:33,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:33,899 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:33,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:19:36,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:36,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:36,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869922551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:36,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:36,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:36,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81715626] [2021-08-21 12:19:36,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:36,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:36,864 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) [2021-08-21 12:19:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:38,061 INFO L93 Difference]: Finished difference Result 678 states and 1951 transitions. [2021-08-21 12:19:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:19:38,061 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 [2021-08-21 12:19:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:38,062 INFO L225 Difference]: With dead ends: 678 [2021-08-21 12:19:38,062 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 12:19:38,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1229.6ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:19:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 12:19:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 449. [2021-08-21 12:19:38,068 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) [2021-08-21 12:19:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1400 transitions. [2021-08-21 12:19:38,068 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1400 transitions. Word has length 19 [2021-08-21 12:19:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:38,068 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1400 transitions. [2021-08-21 12:19:38,068 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) [2021-08-21 12:19:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1400 transitions. [2021-08-21 12:19:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:38,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:38,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:38,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:38,284 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 [2021-08-21 12:19:38,285 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash 453505652, now seen corresponding path program 33 times [2021-08-21 12:19:38,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:38,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432020212] [2021-08-21 12:19:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:38,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:38,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:38,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432020212] [2021-08-21 12:19:38,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432020212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:38,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126067185] [2021-08-21 12:19:38,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:38,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:38,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:38,477 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:38,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:19:40,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:19:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:41,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126067185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:41,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:41,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:41,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991675821] [2021-08-21 12:19:41,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:41,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:41,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:41,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:41,292 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) [2021-08-21 12:19:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:41,823 INFO L93 Difference]: Finished difference Result 617 states and 1827 transitions. [2021-08-21 12:19:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:41,824 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 [2021-08-21 12:19:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:41,825 INFO L225 Difference]: With dead ends: 617 [2021-08-21 12:19:41,825 INFO L226 Difference]: Without dead ends: 588 [2021-08-21 12:19:41,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 577.2ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:19:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-08-21 12:19:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 459. [2021-08-21 12:19:41,829 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) [2021-08-21 12:19:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1429 transitions. [2021-08-21 12:19:41,830 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1429 transitions. Word has length 19 [2021-08-21 12:19:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:41,830 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1429 transitions. [2021-08-21 12:19:41,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1429 transitions. [2021-08-21 12:19:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:41,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:41,831 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:41,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:42,031 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 [2021-08-21 12:19:42,031 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash 104448450, now seen corresponding path program 34 times [2021-08-21 12:19:42,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:42,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651284599] [2021-08-21 12:19:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:42,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:42,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:42,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651284599] [2021-08-21 12:19:42,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651284599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:42,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690258614] [2021-08-21 12:19:42,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:42,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:42,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:42,198 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:42,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:19:44,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:44,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:19:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:45,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690258614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:45,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:45,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:45,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286975917] [2021-08-21 12:19:45,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:45,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:45,215 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) [2021-08-21 12:19:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:45,969 INFO L93 Difference]: Finished difference Result 641 states and 1875 transitions. [2021-08-21 12:19:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:19:45,969 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 [2021-08-21 12:19:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:45,970 INFO L225 Difference]: With dead ends: 641 [2021-08-21 12:19:45,970 INFO L226 Difference]: Without dead ends: 591 [2021-08-21 12:19:45,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:19:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-21 12:19:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 456. [2021-08-21 12:19:45,975 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) [2021-08-21 12:19:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1421 transitions. [2021-08-21 12:19:45,976 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1421 transitions. Word has length 19 [2021-08-21 12:19:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:45,976 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1421 transitions. [2021-08-21 12:19:45,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1421 transitions. [2021-08-21 12:19:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:45,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:45,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:45,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:46,177 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 [2021-08-21 12:19:46,177 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2041722310, now seen corresponding path program 35 times [2021-08-21 12:19:46,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:46,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555808819] [2021-08-21 12:19:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:46,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:46,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:46,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555808819] [2021-08-21 12:19:46,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555808819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:46,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900372200] [2021-08-21 12:19:46,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:46,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:46,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:46,390 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:46,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:19:48,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:19:48,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:48,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:48,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:49,018 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 134 treesize of output 108 [2021-08-21 12:19:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:49,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900372200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:49,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:49,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:49,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571165182] [2021-08-21 12:19:49,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:49,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:49,272 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) [2021-08-21 12:19:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:50,605 INFO L93 Difference]: Finished difference Result 790 states and 2234 transitions. [2021-08-21 12:19:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:19:50,606 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 [2021-08-21 12:19:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:50,607 INFO L225 Difference]: With dead ends: 790 [2021-08-21 12:19:50,607 INFO L226 Difference]: Without dead ends: 745 [2021-08-21 12:19:50,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1302.0ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:19:50,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-08-21 12:19:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 453. [2021-08-21 12:19:50,613 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) [2021-08-21 12:19:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1413 transitions. [2021-08-21 12:19:50,613 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1413 transitions. Word has length 19 [2021-08-21 12:19:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:50,613 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1413 transitions. [2021-08-21 12:19:50,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1413 transitions. [2021-08-21 12:19:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:50,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:50,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:50,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:50,814 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 [2021-08-21 12:19:50,815 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:50,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1453976988, now seen corresponding path program 36 times [2021-08-21 12:19:50,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:50,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454175445] [2021-08-21 12:19:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:50,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:51,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:51,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454175445] [2021-08-21 12:19:51,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454175445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:51,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245288080] [2021-08-21 12:19:51,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:51,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:51,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:51,033 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:51,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:19:53,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:19:53,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:53,797 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 144 treesize of output 116 [2021-08-21 12:19:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:54,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245288080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:54,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:54,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:54,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668590853] [2021-08-21 12:19:54,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:54,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:54,096 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) [2021-08-21 12:19:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:55,522 INFO L93 Difference]: Finished difference Result 885 states and 2503 transitions. [2021-08-21 12:19:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:19:55,522 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 [2021-08-21 12:19:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:55,523 INFO L225 Difference]: With dead ends: 885 [2021-08-21 12:19:55,523 INFO L226 Difference]: Without dead ends: 835 [2021-08-21 12:19:55,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1458.2ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:19:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-08-21 12:19:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 468. [2021-08-21 12:19:55,529 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) [2021-08-21 12:19:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1459 transitions. [2021-08-21 12:19:55,530 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1459 transitions. Word has length 19 [2021-08-21 12:19:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:55,530 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1459 transitions. [2021-08-21 12:19:55,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1459 transitions. [2021-08-21 12:19:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:55,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:55,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:55,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:55,731 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 [2021-08-21 12:19:55,731 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:55,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:55,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1800120244, now seen corresponding path program 37 times [2021-08-21 12:19:55,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:55,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418529828] [2021-08-21 12:19:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:55,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:55,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:55,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418529828] [2021-08-21 12:19:55,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418529828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:55,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961268236] [2021-08-21 12:19:55,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:55,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:55,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:55,907 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:55,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:19:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:58,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:19:58,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:58,797 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 132 treesize of output 106 [2021-08-21 12:19:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:58,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961268236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:58,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:58,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:19:58,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176597684] [2021-08-21 12:19:58,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:58,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:58,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:58,934 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) [2021-08-21 12:19:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:59,705 INFO L93 Difference]: Finished difference Result 657 states and 1931 transitions. [2021-08-21 12:19:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:19:59,706 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 [2021-08-21 12:19:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:59,707 INFO L225 Difference]: With dead ends: 657 [2021-08-21 12:19:59,707 INFO L226 Difference]: Without dead ends: 613 [2021-08-21 12:19:59,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 779.4ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:19:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-21 12:19:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 475. [2021-08-21 12:19:59,712 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) [2021-08-21 12:19:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-08-21 12:19:59,713 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 19 [2021-08-21 12:19:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:59,713 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-08-21 12:19:59,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-08-21 12:19:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:19:59,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:59,714 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:59,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:59,914 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 [2021-08-21 12:19:59,914 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2145789850, now seen corresponding path program 38 times [2021-08-21 12:19:59,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:59,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821658986] [2021-08-21 12:19:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:59,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:00,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:00,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821658986] [2021-08-21 12:20:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821658986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:00,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480373530] [2021-08-21 12:20:00,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:00,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:00,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:00,136 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:00,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:20:02,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:02,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:03,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:20:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:03,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480373530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:03,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:03,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:03,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833461759] [2021-08-21 12:20:03,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:03,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:03,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:03,328 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) [2021-08-21 12:20:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:04,205 INFO L93 Difference]: Finished difference Result 649 states and 1913 transitions. [2021-08-21 12:20:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:20:04,206 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 [2021-08-21 12:20:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:04,207 INFO L225 Difference]: With dead ends: 649 [2021-08-21 12:20:04,207 INFO L226 Difference]: Without dead ends: 605 [2021-08-21 12:20:04,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 902.1ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:20:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-21 12:20:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 475. [2021-08-21 12:20:04,212 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) [2021-08-21 12:20:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-08-21 12:20:04,213 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 19 [2021-08-21 12:20:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:04,213 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-08-21 12:20:04,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-08-21 12:20:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:04,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:04,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:04,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:04,414 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 [2021-08-21 12:20:04,414 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash -380910, now seen corresponding path program 39 times [2021-08-21 12:20:04,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:04,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490683618] [2021-08-21 12:20:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:04,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:04,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:04,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490683618] [2021-08-21 12:20:04,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490683618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:04,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623308263] [2021-08-21 12:20:04,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:20:04,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:04,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:04,613 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:04,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:20:07,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:20:07,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:07,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-21 12:20:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:07,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623308263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:07,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:07,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:07,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090328137] [2021-08-21 12:20:07,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:07,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:07,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:07,764 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) [2021-08-21 12:20:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:08,954 INFO L93 Difference]: Finished difference Result 752 states and 2158 transitions. [2021-08-21 12:20:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:20:08,955 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 [2021-08-21 12:20:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:08,956 INFO L225 Difference]: With dead ends: 752 [2021-08-21 12:20:08,956 INFO L226 Difference]: Without dead ends: 707 [2021-08-21 12:20:08,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:20:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-21 12:20:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 475. [2021-08-21 12:20:08,962 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) [2021-08-21 12:20:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1481 transitions. [2021-08-21 12:20:08,962 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1481 transitions. Word has length 19 [2021-08-21 12:20:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1481 transitions. [2021-08-21 12:20:08,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1481 transitions. [2021-08-21 12:20:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:08,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:08,963 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:08,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:09,181 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 [2021-08-21 12:20:09,182 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:09,182 INFO L82 PathProgramCache]: Analyzing trace with hash -307139370, now seen corresponding path program 40 times [2021-08-21 12:20:09,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:09,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124606021] [2021-08-21 12:20:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:09,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:09,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:09,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124606021] [2021-08-21 12:20:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124606021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:09,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183842178] [2021-08-21 12:20:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:20:09,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:09,410 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:09,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:20:11,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:20:11,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:11,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:20:11,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:20:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:12,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183842178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:12,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:12,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:12,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827901793] [2021-08-21 12:20:12,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:12,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:12,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:12,766 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) [2021-08-21 12:20:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:13,373 INFO L93 Difference]: Finished difference Result 624 states and 1852 transitions. [2021-08-21 12:20:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:20:13,373 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 [2021-08-21 12:20:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:13,374 INFO L225 Difference]: With dead ends: 624 [2021-08-21 12:20:13,375 INFO L226 Difference]: Without dead ends: 595 [2021-08-21 12:20:13,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:20:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-08-21 12:20:13,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 479. [2021-08-21 12:20:13,379 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) [2021-08-21 12:20:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1495 transitions. [2021-08-21 12:20:13,380 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1495 transitions. Word has length 19 [2021-08-21 12:20:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:13,380 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1495 transitions. [2021-08-21 12:20:13,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1495 transitions. [2021-08-21 12:20:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:13,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:13,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:13,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:13,581 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 [2021-08-21 12:20:13,582 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash -656196572, now seen corresponding path program 41 times [2021-08-21 12:20:13,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:13,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068404652] [2021-08-21 12:20:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:13,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:13,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:13,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068404652] [2021-08-21 12:20:13,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068404652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:13,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050535252] [2021-08-21 12:20:13,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:20:13,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:13,792 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:13,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:20:16,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:16,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:16,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:16,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:17,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:20:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:17,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050535252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:17,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:17,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:17,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020921141] [2021-08-21 12:20:17,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:17,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:17,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:17,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:17,338 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) [2021-08-21 12:20:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:18,160 INFO L93 Difference]: Finished difference Result 705 states and 2035 transitions. [2021-08-21 12:20:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:20:18,160 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 [2021-08-21 12:20:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:18,161 INFO L225 Difference]: With dead ends: 705 [2021-08-21 12:20:18,161 INFO L226 Difference]: Without dead ends: 661 [2021-08-21 12:20:18,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:20:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-21 12:20:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 476. [2021-08-21 12:20:18,167 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) [2021-08-21 12:20:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1487 transitions. [2021-08-21 12:20:18,168 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1487 transitions. Word has length 19 [2021-08-21 12:20:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:18,168 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1487 transitions. [2021-08-21 12:20:18,168 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) [2021-08-21 12:20:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1487 transitions. [2021-08-21 12:20:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:18,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:18,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:18,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:18,369 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 [2021-08-21 12:20:18,369 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:18,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1924672150, now seen corresponding path program 42 times [2021-08-21 12:20:18,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:18,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587250647] [2021-08-21 12:20:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:18,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:18,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:18,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587250647] [2021-08-21 12:20:18,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587250647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:18,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391997859] [2021-08-21 12:20:18,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:18,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:18,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:18,575 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:18,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:20:21,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:20:21,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:21,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:21,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:20:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391997859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:22,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:22,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:22,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357127564] [2021-08-21 12:20:22,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:22,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:22,024 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) [2021-08-21 12:20:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:22,891 INFO L93 Difference]: Finished difference Result 626 states and 1858 transitions. [2021-08-21 12:20:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:20:22,891 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 [2021-08-21 12:20:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:22,892 INFO L225 Difference]: With dead ends: 626 [2021-08-21 12:20:22,892 INFO L226 Difference]: Without dead ends: 597 [2021-08-21 12:20:22,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 892.5ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:20:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-08-21 12:20:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 478. [2021-08-21 12:20:22,897 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) [2021-08-21 12:20:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1494 transitions. [2021-08-21 12:20:22,898 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1494 transitions. Word has length 19 [2021-08-21 12:20:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:22,898 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1494 transitions. [2021-08-21 12:20:22,898 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) [2021-08-21 12:20:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1494 transitions. [2021-08-21 12:20:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:22,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:22,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:22,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 12:20:23,099 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 [2021-08-21 12:20:23,099 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:23,100 INFO L82 PathProgramCache]: Analyzing trace with hash 678876434, now seen corresponding path program 43 times [2021-08-21 12:20:23,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:23,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801313715] [2021-08-21 12:20:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:23,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:23,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:23,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801313715] [2021-08-21 12:20:23,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801313715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:23,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064029935] [2021-08-21 12:20:23,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:23,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:23,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:23,316 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:23,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:20:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:20:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:26,608 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 160 treesize of output 130 [2021-08-21 12:20:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064029935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:26,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:26,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:26,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593265289] [2021-08-21 12:20:26,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:26,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:26,987 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) [2021-08-21 12:20:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:27,742 INFO L93 Difference]: Finished difference Result 616 states and 1838 transitions. [2021-08-21 12:20:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:20:27,742 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 [2021-08-21 12:20:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:27,743 INFO L225 Difference]: With dead ends: 616 [2021-08-21 12:20:27,743 INFO L226 Difference]: Without dead ends: 594 [2021-08-21 12:20:27,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 824.5ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:20:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-21 12:20:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 480. [2021-08-21 12:20:27,748 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) [2021-08-21 12:20:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1501 transitions. [2021-08-21 12:20:27,749 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1501 transitions. Word has length 19 [2021-08-21 12:20:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:27,749 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1501 transitions. [2021-08-21 12:20:27,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1501 transitions. [2021-08-21 12:20:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:27,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:27,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:27,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 12:20:27,953 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 [2021-08-21 12:20:27,954 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash -759085102, now seen corresponding path program 44 times [2021-08-21 12:20:27,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:27,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377642791] [2021-08-21 12:20:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:27,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:28,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:28,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377642791] [2021-08-21 12:20:28,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377642791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:28,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196571769] [2021-08-21 12:20:28,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:28,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:28,173 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:28,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:20:31,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:31,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:31,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:31,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:20:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:31,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196571769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:31,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:31,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:31,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126183383] [2021-08-21 12:20:31,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:31,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:31,847 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) [2021-08-21 12:20:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:32,624 INFO L93 Difference]: Finished difference Result 676 states and 2007 transitions. [2021-08-21 12:20:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:32,624 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 [2021-08-21 12:20:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:32,625 INFO L225 Difference]: With dead ends: 676 [2021-08-21 12:20:32,625 INFO L226 Difference]: Without dead ends: 661 [2021-08-21 12:20:32,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 799.7ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:20:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-21 12:20:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 485. [2021-08-21 12:20:32,631 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) [2021-08-21 12:20:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1525 transitions. [2021-08-21 12:20:32,632 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1525 transitions. Word has length 19 [2021-08-21 12:20:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:32,632 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1525 transitions. [2021-08-21 12:20:32,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1525 transitions. [2021-08-21 12:20:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:32,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:32,632 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:32,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:32,856 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 [2021-08-21 12:20:32,857 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:32,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:32,857 INFO L82 PathProgramCache]: Analyzing trace with hash 235290518, now seen corresponding path program 45 times [2021-08-21 12:20:32,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:32,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716050071] [2021-08-21 12:20:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:32,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:33,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716050071] [2021-08-21 12:20:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716050071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560725759] [2021-08-21 12:20:33,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:20:33,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:33,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:33,058 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:33,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:20:35,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:20:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:35,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:35,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:36,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-21 12:20:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:36,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560725759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:36,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:36,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:36,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762650323] [2021-08-21 12:20:36,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:36,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:36,811 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) [2021-08-21 12:20:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:37,728 INFO L93 Difference]: Finished difference Result 653 states and 1942 transitions. [2021-08-21 12:20:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:20:37,729 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 [2021-08-21 12:20:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:37,730 INFO L225 Difference]: With dead ends: 653 [2021-08-21 12:20:37,730 INFO L226 Difference]: Without dead ends: 638 [2021-08-21 12:20:37,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:20:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-21 12:20:37,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 480. [2021-08-21 12:20:37,735 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) [2021-08-21 12:20:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1501 transitions. [2021-08-21 12:20:37,736 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1501 transitions. Word has length 19 [2021-08-21 12:20:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:37,736 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1501 transitions. [2021-08-21 12:20:37,736 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) [2021-08-21 12:20:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1501 transitions. [2021-08-21 12:20:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:37,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:37,737 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:37,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 12:20:37,948 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 [2021-08-21 12:20:37,949 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1105041956, now seen corresponding path program 46 times [2021-08-21 12:20:37,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:37,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976412562] [2021-08-21 12:20:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:37,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:38,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:38,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976412562] [2021-08-21 12:20:38,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976412562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:38,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984031778] [2021-08-21 12:20:38,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:20:38,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:38,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:38,186 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:38,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:20:41,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:20:41,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:41,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:20:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:41,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:20:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:42,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984031778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:42,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:42,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:42,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034177415] [2021-08-21 12:20:42,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:42,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:42,040 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) [2021-08-21 12:20:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:42,796 INFO L93 Difference]: Finished difference Result 702 states and 2053 transitions. [2021-08-21 12:20:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:20:42,796 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 [2021-08-21 12:20:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:42,798 INFO L225 Difference]: With dead ends: 702 [2021-08-21 12:20:42,798 INFO L226 Difference]: Without dead ends: 659 [2021-08-21 12:20:42,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 841.0ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:20:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-08-21 12:20:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 483. [2021-08-21 12:20:42,803 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) [2021-08-21 12:20:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1516 transitions. [2021-08-21 12:20:42,804 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1516 transitions. Word has length 19 [2021-08-21 12:20:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:42,804 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1516 transitions. [2021-08-21 12:20:42,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1516 transitions. [2021-08-21 12:20:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:42,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:42,805 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:42,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 12:20:43,013 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 [2021-08-21 12:20:43,013 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1845939290, now seen corresponding path program 47 times [2021-08-21 12:20:43,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:43,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934427432] [2021-08-21 12:20:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:43,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:43,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:43,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934427432] [2021-08-21 12:20:43,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934427432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:43,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707351608] [2021-08-21 12:20:43,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:20:43,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:43,301 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:43,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:20:46,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:20:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:46,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-21 12:20:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:47,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707351608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:47,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:47,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:47,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411263178] [2021-08-21 12:20:47,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:47,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:47,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:47,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:47,077 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) [2021-08-21 12:20:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:48,405 INFO L93 Difference]: Finished difference Result 774 states and 2232 transitions. [2021-08-21 12:20:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:20:48,405 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 [2021-08-21 12:20:48,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:48,407 INFO L225 Difference]: With dead ends: 774 [2021-08-21 12:20:48,407 INFO L226 Difference]: Without dead ends: 709 [2021-08-21 12:20:48,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1318.6ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:20:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-21 12:20:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 486. [2021-08-21 12:20:48,412 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) [2021-08-21 12:20:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1531 transitions. [2021-08-21 12:20:48,413 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1531 transitions. Word has length 19 [2021-08-21 12:20:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:48,413 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1531 transitions. [2021-08-21 12:20:48,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1531 transitions. [2021-08-21 12:20:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:48,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:48,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:48,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 12:20:48,616 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 [2021-08-21 12:20:48,617 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:48,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:48,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1465402702, now seen corresponding path program 48 times [2021-08-21 12:20:48,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:48,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727828196] [2021-08-21 12:20:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:48,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:48,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727828196] [2021-08-21 12:20:48,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727828196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701582640] [2021-08-21 12:20:48,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:48,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:48,867 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:48,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:20:51,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:20:51,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:51,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-21 12:20:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:52,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701582640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:52,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:52,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:52,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498940893] [2021-08-21 12:20:52,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:52,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:52,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:52,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:52,756 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) [2021-08-21 12:20:53,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:53,943 INFO L93 Difference]: Finished difference Result 699 states and 2057 transitions. [2021-08-21 12:20:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:20:53,944 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 [2021-08-21 12:20:53,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:53,945 INFO L225 Difference]: With dead ends: 699 [2021-08-21 12:20:53,945 INFO L226 Difference]: Without dead ends: 657 [2021-08-21 12:20:53,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1216.8ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:20:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-21 12:20:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 482. [2021-08-21 12:20:53,950 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) [2021-08-21 12:20:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1513 transitions. [2021-08-21 12:20:53,951 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1513 transitions. Word has length 19 [2021-08-21 12:20:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:53,951 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1513 transitions. [2021-08-21 12:20:53,951 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) [2021-08-21 12:20:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1513 transitions. [2021-08-21 12:20:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:53,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:53,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:53,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 12:20:54,152 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 [2021-08-21 12:20:54,152 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1545606510, now seen corresponding path program 49 times [2021-08-21 12:20:54,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:54,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134212636] [2021-08-21 12:20:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:54,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:54,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:54,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134212636] [2021-08-21 12:20:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134212636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:54,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442796684] [2021-08-21 12:20:54,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:54,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:54,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:54,401 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:54,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:20:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:20:57,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:58,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-21 12:20:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:58,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442796684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:58,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:58,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:20:58,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005027605] [2021-08-21 12:20:58,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:20:58,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:20:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:20:58,491 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) [2021-08-21 12:20:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:59,388 INFO L93 Difference]: Finished difference Result 836 states and 2420 transitions. [2021-08-21 12:20:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:20:59,388 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 [2021-08-21 12:20:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:59,390 INFO L225 Difference]: With dead ends: 836 [2021-08-21 12:20:59,390 INFO L226 Difference]: Without dead ends: 787 [2021-08-21 12:20:59,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1012.1ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:20:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-08-21 12:20:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 494. [2021-08-21 12:20:59,396 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) [2021-08-21 12:20:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1555 transitions. [2021-08-21 12:20:59,397 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1555 transitions. Word has length 19 [2021-08-21 12:20:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:59,397 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1555 transitions. [2021-08-21 12:20:59,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1555 transitions. [2021-08-21 12:20:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:20:59,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:59,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:59,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 12:20:59,598 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 [2021-08-21 12:20:59,598 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash 44263866, now seen corresponding path program 50 times [2021-08-21 12:20:59,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:59,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204152110] [2021-08-21 12:20:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:59,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:59,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:59,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204152110] [2021-08-21 12:20:59,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204152110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:59,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746711516] [2021-08-21 12:20:59,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:59,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:59,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:59,865 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:59,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:21:03,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:03,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:21:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:03,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-21 12:21:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:04,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746711516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:04,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:04,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:04,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798316498] [2021-08-21 12:21:04,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:04,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:04,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:04,122 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) [2021-08-21 12:21:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:05,032 INFO L93 Difference]: Finished difference Result 793 states and 2319 transitions. [2021-08-21 12:21:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:21:05,032 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 [2021-08-21 12:21:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:05,033 INFO L225 Difference]: With dead ends: 793 [2021-08-21 12:21:05,033 INFO L226 Difference]: Without dead ends: 744 [2021-08-21 12:21:05,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1054.3ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:21:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-21 12:21:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 497. [2021-08-21 12:21:05,039 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) [2021-08-21 12:21:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1570 transitions. [2021-08-21 12:21:05,040 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1570 transitions. Word has length 19 [2021-08-21 12:21:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:05,040 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1570 transitions. [2021-08-21 12:21:05,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1570 transitions. [2021-08-21 12:21:05,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:05,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:05,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:05,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 12:21:05,241 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 [2021-08-21 12:21:05,242 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash 785161200, now seen corresponding path program 51 times [2021-08-21 12:21:05,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:05,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013485572] [2021-08-21 12:21:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:05,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:05,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:05,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013485572] [2021-08-21 12:21:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013485572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:05,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38841661] [2021-08-21 12:21:05,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:05,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:05,497 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:05,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:21:08,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:21:08,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:08,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:09,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 115 [2021-08-21 12:21:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:09,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38841661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:09,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:09,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:09,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131812132] [2021-08-21 12:21:09,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:09,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:09,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:09,719 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) [2021-08-21 12:21:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:10,943 INFO L93 Difference]: Finished difference Result 881 states and 2572 transitions. [2021-08-21 12:21:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:21:10,943 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 [2021-08-21 12:21:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:10,945 INFO L225 Difference]: With dead ends: 881 [2021-08-21 12:21:10,945 INFO L226 Difference]: Without dead ends: 851 [2021-08-21 12:21:10,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1322.6ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:21:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2021-08-21 12:21:10,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 504. [2021-08-21 12:21:10,952 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) [2021-08-21 12:21:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1605 transitions. [2021-08-21 12:21:10,953 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1605 transitions. Word has length 19 [2021-08-21 12:21:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:10,953 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1605 transitions. [2021-08-21 12:21:10,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1605 transitions. [2021-08-21 12:21:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:10,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:10,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:10,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:11,154 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 [2021-08-21 12:21:11,154 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:11,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1779536820, now seen corresponding path program 52 times [2021-08-21 12:21:11,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:11,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317630905] [2021-08-21 12:21:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:11,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:11,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:11,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317630905] [2021-08-21 12:21:11,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317630905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:11,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940181943] [2021-08-21 12:21:11,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:11,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:11,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:11,433 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:11,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:21:14,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:14,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:21:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:15,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:21:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:15,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940181943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:15,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:15,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:15,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241794485] [2021-08-21 12:21:15,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:15,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:15,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:15,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:15,947 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) [2021-08-21 12:21:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:18,298 INFO L93 Difference]: Finished difference Result 914 states and 2659 transitions. [2021-08-21 12:21:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:21:18,299 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 [2021-08-21 12:21:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:18,300 INFO L225 Difference]: With dead ends: 914 [2021-08-21 12:21:18,300 INFO L226 Difference]: Without dead ends: 877 [2021-08-21 12:21:18,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2403.5ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:21:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-08-21 12:21:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 504. [2021-08-21 12:21:18,307 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) [2021-08-21 12:21:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1605 transitions. [2021-08-21 12:21:18,308 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1605 transitions. Word has length 19 [2021-08-21 12:21:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:18,308 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1605 transitions. [2021-08-21 12:21:18,308 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) [2021-08-21 12:21:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1605 transitions. [2021-08-21 12:21:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:18,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:18,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:18,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:18,509 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 [2021-08-21 12:21:18,509 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1511077430, now seen corresponding path program 53 times [2021-08-21 12:21:18,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:18,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944206675] [2021-08-21 12:21:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:18,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:18,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:18,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944206675] [2021-08-21 12:21:18,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944206675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:18,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19537280] [2021-08-21 12:21:18,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:18,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:18,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:18,754 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:18,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:21:22,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:22,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:21:22,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:22,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:21:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:23,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19537280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:23,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:23,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:23,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227039886] [2021-08-21 12:21:23,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:23,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:23,147 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) [2021-08-21 12:21:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:24,976 INFO L93 Difference]: Finished difference Result 910 states and 2640 transitions. [2021-08-21 12:21:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:21:24,977 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 [2021-08-21 12:21:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:24,978 INFO L225 Difference]: With dead ends: 910 [2021-08-21 12:21:24,978 INFO L226 Difference]: Without dead ends: 874 [2021-08-21 12:21:24,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1834.3ms TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:21:24,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-08-21 12:21:24,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 512. [2021-08-21 12:21:24,985 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) [2021-08-21 12:21:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1639 transitions. [2021-08-21 12:21:24,986 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1639 transitions. Word has length 19 [2021-08-21 12:21:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:24,986 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1639 transitions. [2021-08-21 12:21:24,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1639 transitions. [2021-08-21 12:21:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:24,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:24,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:25,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 12:21:25,187 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 [2021-08-21 12:21:25,188 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:25,188 INFO L82 PathProgramCache]: Analyzing trace with hash 248975510, now seen corresponding path program 54 times [2021-08-21 12:21:25,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:25,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167271066] [2021-08-21 12:21:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:25,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:25,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:25,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167271066] [2021-08-21 12:21:25,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167271066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:25,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568414338] [2021-08-21 12:21:25,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:21:25,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:25,394 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:25,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:21:28,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:21:28,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:28,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:28,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:29,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:21:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:29,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568414338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:29,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:29,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:29,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639095584] [2021-08-21 12:21:29,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:29,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:29,625 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) [2021-08-21 12:21:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:32,041 INFO L93 Difference]: Finished difference Result 846 states and 2471 transitions. [2021-08-21 12:21:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:21:32,041 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 [2021-08-21 12:21:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:32,042 INFO L225 Difference]: With dead ends: 846 [2021-08-21 12:21:32,042 INFO L226 Difference]: Without dead ends: 798 [2021-08-21 12:21:32,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2318.8ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:21:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-08-21 12:21:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 506. [2021-08-21 12:21:32,048 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) [2021-08-21 12:21:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1614 transitions. [2021-08-21 12:21:32,049 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1614 transitions. Word has length 19 [2021-08-21 12:21:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:32,049 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1614 transitions. [2021-08-21 12:21:32,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1614 transitions. [2021-08-21 12:21:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:32,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:32,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:32,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:32,250 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 [2021-08-21 12:21:32,251 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:32,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:32,251 INFO L82 PathProgramCache]: Analyzing trace with hash -383239244, now seen corresponding path program 55 times [2021-08-21 12:21:32,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:32,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568619355] [2021-08-21 12:21:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:32,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:32,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:32,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568619355] [2021-08-21 12:21:32,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568619355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:32,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482013779] [2021-08-21 12:21:32,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:21:32,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:32,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:32,441 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:32,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:21:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:35,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:36,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:21:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:36,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482013779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:36,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:36,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:36,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595331372] [2021-08-21 12:21:36,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:36,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:36,454 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) [2021-08-21 12:21:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:36,903 INFO L93 Difference]: Finished difference Result 729 states and 2196 transitions. [2021-08-21 12:21:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:21:36,904 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 [2021-08-21 12:21:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:36,905 INFO L225 Difference]: With dead ends: 729 [2021-08-21 12:21:36,905 INFO L226 Difference]: Without dead ends: 714 [2021-08-21 12:21:36,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 480.3ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:21:36,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-08-21 12:21:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 516. [2021-08-21 12:21:36,910 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) [2021-08-21 12:21:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1645 transitions. [2021-08-21 12:21:36,911 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1645 transitions. Word has length 19 [2021-08-21 12:21:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:36,911 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1645 transitions. [2021-08-21 12:21:36,911 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) [2021-08-21 12:21:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1645 transitions. [2021-08-21 12:21:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:36,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:36,912 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:36,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:37,112 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 [2021-08-21 12:21:37,113 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1530060728, now seen corresponding path program 56 times [2021-08-21 12:21:37,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:37,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142967746] [2021-08-21 12:21:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:37,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:37,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:37,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142967746] [2021-08-21 12:21:37,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142967746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:37,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631631890] [2021-08-21 12:21:37,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:21:37,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:37,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:37,309 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:37,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:21:40,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:40,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:41,354 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 134 treesize of output 108 [2021-08-21 12:21:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:41,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631631890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:41,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:41,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:41,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564668673] [2021-08-21 12:21:41,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:41,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:41,524 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) [2021-08-21 12:21:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:42,221 INFO L93 Difference]: Finished difference Result 762 states and 2292 transitions. [2021-08-21 12:21:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:21:42,221 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 [2021-08-21 12:21:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:42,222 INFO L225 Difference]: With dead ends: 762 [2021-08-21 12:21:42,222 INFO L226 Difference]: Without dead ends: 747 [2021-08-21 12:21:42,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:21:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-08-21 12:21:42,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 519. [2021-08-21 12:21:42,228 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) [2021-08-21 12:21:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1656 transitions. [2021-08-21 12:21:42,229 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1656 transitions. Word has length 19 [2021-08-21 12:21:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:42,229 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1656 transitions. [2021-08-21 12:21:42,229 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) [2021-08-21 12:21:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1656 transitions. [2021-08-21 12:21:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:42,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:42,229 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:42,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:42,436 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 [2021-08-21 12:21:42,436 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2036406994, now seen corresponding path program 57 times [2021-08-21 12:21:42,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:42,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127390022] [2021-08-21 12:21:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:42,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:42,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127390022] [2021-08-21 12:21:42,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127390022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561589537] [2021-08-21 12:21:42,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:42,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:42,605 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:42,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:21:46,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:21:46,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:46,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:46,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-21 12:21:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:46,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561589537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:46,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:46,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:46,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947362114] [2021-08-21 12:21:46,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:46,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:46,777 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) [2021-08-21 12:21:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:47,427 INFO L93 Difference]: Finished difference Result 734 states and 2219 transitions. [2021-08-21 12:21:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:21:47,427 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 [2021-08-21 12:21:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:47,429 INFO L225 Difference]: With dead ends: 734 [2021-08-21 12:21:47,429 INFO L226 Difference]: Without dead ends: 719 [2021-08-21 12:21:47,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:21:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-08-21 12:21:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 525. [2021-08-21 12:21:47,435 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) [2021-08-21 12:21:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1675 transitions. [2021-08-21 12:21:47,436 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1675 transitions. Word has length 19 [2021-08-21 12:21:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:47,436 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1675 transitions. [2021-08-21 12:21:47,436 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) [2021-08-21 12:21:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1675 transitions. [2021-08-21 12:21:47,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:47,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:47,436 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:47,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:47,637 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 [2021-08-21 12:21:47,637 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1909503100, now seen corresponding path program 58 times [2021-08-21 12:21:47,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:47,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485687748] [2021-08-21 12:21:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:47,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:47,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:47,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485687748] [2021-08-21 12:21:47,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485687748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:47,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685710266] [2021-08-21 12:21:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:47,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:47,865 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:47,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:21:51,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:21:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 122 [2021-08-21 12:21:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:52,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685710266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:52,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:52,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:21:52,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993645669] [2021-08-21 12:21:52,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:21:52,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:21:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:21:52,088 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) [2021-08-21 12:21:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:52,872 INFO L93 Difference]: Finished difference Result 825 states and 2426 transitions. [2021-08-21 12:21:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:21:52,873 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 [2021-08-21 12:21:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:52,874 INFO L225 Difference]: With dead ends: 825 [2021-08-21 12:21:52,874 INFO L226 Difference]: Without dead ends: 767 [2021-08-21 12:21:52,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:21:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-08-21 12:21:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 531. [2021-08-21 12:21:52,880 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) [2021-08-21 12:21:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1697 transitions. [2021-08-21 12:21:52,881 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1697 transitions. Word has length 19 [2021-08-21 12:21:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:52,881 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1697 transitions. [2021-08-21 12:21:52,881 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) [2021-08-21 12:21:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1697 transitions. [2021-08-21 12:21:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:52,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:52,882 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:52,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:53,082 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 [2021-08-21 12:21:53,082 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:53,082 INFO L82 PathProgramCache]: Analyzing trace with hash -236667660, now seen corresponding path program 59 times [2021-08-21 12:21:53,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:53,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915057618] [2021-08-21 12:21:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:53,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:53,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:53,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915057618] [2021-08-21 12:21:53,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915057618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:53,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405327888] [2021-08-21 12:21:53,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:53,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:53,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:53,262 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:53,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:21:56,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:21:56,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:56,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:57,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:21:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:57,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405327888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:57,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:57,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 12:21:57,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875462682] [2021-08-21 12:21:57,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:57,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:57,495 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) [2021-08-21 12:21:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:57,956 INFO L93 Difference]: Finished difference Result 707 states and 2179 transitions. [2021-08-21 12:21:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:57,956 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 [2021-08-21 12:21:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:57,958 INFO L225 Difference]: With dead ends: 707 [2021-08-21 12:21:57,958 INFO L226 Difference]: Without dead ends: 692 [2021-08-21 12:21:57,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:21:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-08-21 12:21:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 534. [2021-08-21 12:21:57,964 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) [2021-08-21 12:21:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1708 transitions. [2021-08-21 12:21:57,965 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1708 transitions. Word has length 19 [2021-08-21 12:21:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:57,965 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1708 transitions. [2021-08-21 12:21:57,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1708 transitions. [2021-08-21 12:21:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:21:57,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:57,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:58,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:58,166 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 [2021-08-21 12:21:58,167 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:58,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1345472406, now seen corresponding path program 60 times [2021-08-21 12:21:58,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:58,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28975686] [2021-08-21 12:21:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:58,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:58,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:58,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28975686] [2021-08-21 12:21:58,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28975686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:58,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682395549] [2021-08-21 12:21:58,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:21:58,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:58,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:58,394 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:58,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:22:02,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:22:02,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:02,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:22:02,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:22:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:02,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682395549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:02,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:02,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:22:02,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823053280] [2021-08-21 12:22:02,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:02,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:02,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:02,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:02,787 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) [2021-08-21 12:22:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:03,941 INFO L93 Difference]: Finished difference Result 949 states and 2780 transitions. [2021-08-21 12:22:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:22:03,942 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 [2021-08-21 12:22:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:03,943 INFO L225 Difference]: With dead ends: 949 [2021-08-21 12:22:03,943 INFO L226 Difference]: Without dead ends: 919 [2021-08-21 12:22:03,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1129.4ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:22:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-08-21 12:22:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 540. [2021-08-21 12:22:03,950 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) [2021-08-21 12:22:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1732 transitions. [2021-08-21 12:22:03,950 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1732 transitions. Word has length 19 [2021-08-21 12:22:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:03,951 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1732 transitions. [2021-08-21 12:22:03,951 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) [2021-08-21 12:22:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1732 transitions. [2021-08-21 12:22:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:03,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:03,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:03,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:04,152 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 [2021-08-21 12:22:04,152 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1840701486, now seen corresponding path program 61 times [2021-08-21 12:22:04,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:04,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476019083] [2021-08-21 12:22:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:04,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:04,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:04,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476019083] [2021-08-21 12:22:04,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476019083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:04,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398589474] [2021-08-21 12:22:04,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:04,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:04,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:04,429 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:04,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:22:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:08,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:22:08,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 126 [2021-08-21 12:22:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:08,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398589474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:08,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:08,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:22:08,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713563829] [2021-08-21 12:22:08,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:08,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:08,980 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) [2021-08-21 12:22:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:10,882 INFO L93 Difference]: Finished difference Result 906 states and 2747 transitions. [2021-08-21 12:22:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:22:10,883 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 [2021-08-21 12:22:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:10,884 INFO L225 Difference]: With dead ends: 906 [2021-08-21 12:22:10,884 INFO L226 Difference]: Without dead ends: 862 [2021-08-21 12:22:10,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1963.6ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:22:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-08-21 12:22:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 541. [2021-08-21 12:22:10,895 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) [2021-08-21 12:22:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1738 transitions. [2021-08-21 12:22:10,896 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1738 transitions. Word has length 19 [2021-08-21 12:22:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:10,896 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1738 transitions. [2021-08-21 12:22:10,896 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) [2021-08-21 12:22:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1738 transitions. [2021-08-21 12:22:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:10,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:10,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:10,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:11,110 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 [2021-08-21 12:22:11,111 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:11,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1385028344, now seen corresponding path program 62 times [2021-08-21 12:22:11,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:11,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645536033] [2021-08-21 12:22:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:11,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:11,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:11,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645536033] [2021-08-21 12:22:11,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645536033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:11,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270548427] [2021-08-21 12:22:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:22:11,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:11,329 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:11,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:22:15,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:22:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:15,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:22:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:15,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270548427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:15,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:15,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:22:15,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755575750] [2021-08-21 12:22:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:15,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:15,955 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) [2021-08-21 12:22:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:17,602 INFO L93 Difference]: Finished difference Result 945 states and 2804 transitions. [2021-08-21 12:22:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:22:17,602 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 [2021-08-21 12:22:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:17,604 INFO L225 Difference]: With dead ends: 945 [2021-08-21 12:22:17,604 INFO L226 Difference]: Without dead ends: 930 [2021-08-21 12:22:17,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1592.2ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:22:17,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-21 12:22:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 544. [2021-08-21 12:22:17,610 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) [2021-08-21 12:22:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1751 transitions. [2021-08-21 12:22:17,611 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1751 transitions. Word has length 19 [2021-08-21 12:22:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:17,611 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1751 transitions. [2021-08-21 12:22:17,611 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) [2021-08-21 12:22:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1751 transitions. [2021-08-21 12:22:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:17,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:17,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:17,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 12:22:17,812 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 [2021-08-21 12:22:17,812 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash -783434386, now seen corresponding path program 63 times [2021-08-21 12:22:17,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:17,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622278111] [2021-08-21 12:22:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:17,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:18,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:18,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622278111] [2021-08-21 12:22:18,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622278111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:18,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868853122] [2021-08-21 12:22:18,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:22:18,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:18,088 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:18,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:22:21,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:22:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:22:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:22:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:23,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868853122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:23,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:22:23,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412588408] [2021-08-21 12:22:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:23,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:23,072 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) [2021-08-21 12:22:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:26,058 INFO L93 Difference]: Finished difference Result 974 states and 2855 transitions. [2021-08-21 12:22:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:22:26,058 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 [2021-08-21 12:22:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:26,060 INFO L225 Difference]: With dead ends: 974 [2021-08-21 12:22:26,060 INFO L226 Difference]: Without dead ends: 953 [2021-08-21 12:22:26,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2977.1ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:22:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-08-21 12:22:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 546. [2021-08-21 12:22:26,067 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) [2021-08-21 12:22:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1758 transitions. [2021-08-21 12:22:26,068 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1758 transitions. Word has length 19 [2021-08-21 12:22:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:26,068 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1758 transitions. [2021-08-21 12:22:26,068 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) [2021-08-21 12:22:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1758 transitions. [2021-08-21 12:22:26,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:26,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:26,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:26,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 12:22:26,269 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 [2021-08-21 12:22:26,269 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:26,270 INFO L82 PathProgramCache]: Analyzing trace with hash 875538046, now seen corresponding path program 64 times [2021-08-21 12:22:26,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:26,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672340831] [2021-08-21 12:22:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:26,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:26,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:26,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672340831] [2021-08-21 12:22:26,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672340831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:26,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056669324] [2021-08-21 12:22:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:22:26,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:26,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:26,482 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:26,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:22:30,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:22:30,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:22:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:30,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-21 12:22:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:31,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056669324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:31,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:31,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:22:31,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523698483] [2021-08-21 12:22:31,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:31,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:31,099 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) [2021-08-21 12:22:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:31,708 INFO L93 Difference]: Finished difference Result 747 states and 2296 transitions. [2021-08-21 12:22:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:22:31,708 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 [2021-08-21 12:22:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:31,709 INFO L225 Difference]: With dead ends: 747 [2021-08-21 12:22:31,709 INFO L226 Difference]: Without dead ends: 718 [2021-08-21 12:22:31,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:22:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-21 12:22:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 550. [2021-08-21 12:22:31,715 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) [2021-08-21 12:22:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1772 transitions. [2021-08-21 12:22:31,716 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1772 transitions. Word has length 19 [2021-08-21 12:22:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:31,716 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1772 transitions. [2021-08-21 12:22:31,716 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) [2021-08-21 12:22:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1772 transitions. [2021-08-21 12:22:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:31,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:31,717 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:31,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 12:22:31,917 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 [2021-08-21 12:22:31,917 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash 526480844, now seen corresponding path program 65 times [2021-08-21 12:22:31,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:31,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415584217] [2021-08-21 12:22:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:31,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:32,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:32,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415584217] [2021-08-21 12:22:32,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415584217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:32,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358579912] [2021-08-21 12:22:32,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:22:32,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:32,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:32,133 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:32,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:22:36,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:36,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:36,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:22:36,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:36,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:22:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:36,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358579912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:36,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:36,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:22:36,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277035615] [2021-08-21 12:22:36,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:36,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:36,757 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) [2021-08-21 12:22:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:37,268 INFO L93 Difference]: Finished difference Result 737 states and 2274 transitions. [2021-08-21 12:22:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:22:37,268 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 [2021-08-21 12:22:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:37,270 INFO L225 Difference]: With dead ends: 737 [2021-08-21 12:22:37,270 INFO L226 Difference]: Without dead ends: 722 [2021-08-21 12:22:37,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:22:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-08-21 12:22:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 550. [2021-08-21 12:22:37,276 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) [2021-08-21 12:22:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1772 transitions. [2021-08-21 12:22:37,277 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1772 transitions. Word has length 19 [2021-08-21 12:22:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:37,278 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1772 transitions. [2021-08-21 12:22:37,278 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) [2021-08-21 12:22:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1772 transitions. [2021-08-21 12:22:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:37,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:37,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:37,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:37,479 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 [2021-08-21 12:22:37,479 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1619689916, now seen corresponding path program 66 times [2021-08-21 12:22:37,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:37,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461244451] [2021-08-21 12:22:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:37,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:37,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461244451] [2021-08-21 12:22:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461244451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433995026] [2021-08-21 12:22:37,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:37,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:37,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:37,744 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:37,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:22:41,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:22:41,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:22:41,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:42,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:22:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:42,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433995026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:42,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:42,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:22:42,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763807517] [2021-08-21 12:22:42,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:42,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:42,586 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) [2021-08-21 12:22:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:43,103 INFO L93 Difference]: Finished difference Result 809 states and 2446 transitions. [2021-08-21 12:22:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:22:43,103 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 [2021-08-21 12:22:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:43,105 INFO L225 Difference]: With dead ends: 809 [2021-08-21 12:22:43,105 INFO L226 Difference]: Without dead ends: 766 [2021-08-21 12:22:43,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:22:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-21 12:22:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 556. [2021-08-21 12:22:43,111 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) [2021-08-21 12:22:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1791 transitions. [2021-08-21 12:22:43,112 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1791 transitions. Word has length 19 [2021-08-21 12:22:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:43,112 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1791 transitions. [2021-08-21 12:22:43,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1791 transitions. [2021-08-21 12:22:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:43,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:43,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:43,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 12:22:43,313 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 [2021-08-21 12:22:43,313 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1926448376, now seen corresponding path program 67 times [2021-08-21 12:22:43,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:43,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403305349] [2021-08-21 12:22:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:43,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:43,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:43,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403305349] [2021-08-21 12:22:43,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403305349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:43,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238356965] [2021-08-21 12:22:43,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:43,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:43,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:43,632 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:43,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:22:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:47,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:22:47,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:48,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:22:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:48,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238356965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:48,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:48,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:22:48,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735643464] [2021-08-21 12:22:48,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:22:48,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:48,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:22:48,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:22:48,638 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) [2021-08-21 12:22:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:49,258 INFO L93 Difference]: Finished difference Result 788 states and 2397 transitions. [2021-08-21 12:22:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:22:49,258 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 [2021-08-21 12:22:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:49,260 INFO L225 Difference]: With dead ends: 788 [2021-08-21 12:22:49,260 INFO L226 Difference]: Without dead ends: 744 [2021-08-21 12:22:49,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:22:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-21 12:22:49,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 559. [2021-08-21 12:22:49,266 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) [2021-08-21 12:22:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-21 12:22:49,266 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-21 12:22:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:49,267 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-21 12:22:49,267 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) [2021-08-21 12:22:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-21 12:22:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:49,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:49,267 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:49,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 12:22:49,473 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 [2021-08-21 12:22:49,473 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:49,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2019461718, now seen corresponding path program 68 times [2021-08-21 12:22:49,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:49,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526755964] [2021-08-21 12:22:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:49,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:49,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:49,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526755964] [2021-08-21 12:22:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526755964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:49,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247951587] [2021-08-21 12:22:49,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:22:49,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:49,708 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:49,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:22:53,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:53,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:22:53,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:54,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:22:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:54,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247951587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:54,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:54,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 12:22:54,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511066622] [2021-08-21 12:22:54,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:22:54,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:22:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:22:54,627 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) [2021-08-21 12:22:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:55,436 INFO L93 Difference]: Finished difference Result 836 states and 2512 transitions. [2021-08-21 12:22:55,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:22:55,436 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 [2021-08-21 12:22:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:55,438 INFO L225 Difference]: With dead ends: 836 [2021-08-21 12:22:55,438 INFO L226 Difference]: Without dead ends: 821 [2021-08-21 12:22:55,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:22:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-08-21 12:22:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 559. [2021-08-21 12:22:55,444 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) [2021-08-21 12:22:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-21 12:22:55,445 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-21 12:22:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:55,445 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-21 12:22:55,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:55,445 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-21 12:22:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:22:55,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:55,446 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:55,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 12:22:55,648 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 [2021-08-21 12:22:55,649 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash -940432572, now seen corresponding path program 69 times [2021-08-21 12:22:55,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:55,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250266288] [2021-08-21 12:22:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:55,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:55,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:55,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250266288] [2021-08-21 12:22:55,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250266288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:55,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454456625] [2021-08-21 12:22:55,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:22:55,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:55,931 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:55,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:23:00,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:23:00,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:23:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:00,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 152 [2021-08-21 12:23:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:01,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454456625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:01,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:01,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:01,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217272687] [2021-08-21 12:23:01,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:01,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:01,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:01,033 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) [2021-08-21 12:23:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:02,105 INFO L93 Difference]: Finished difference Result 943 states and 2782 transitions. [2021-08-21 12:23:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:23:02,105 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 [2021-08-21 12:23:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:02,107 INFO L225 Difference]: With dead ends: 943 [2021-08-21 12:23:02,107 INFO L226 Difference]: Without dead ends: 928 [2021-08-21 12:23:02,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1078.0ms TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:23:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-08-21 12:23:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 561. [2021-08-21 12:23:02,114 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) [2021-08-21 12:23:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1815 transitions. [2021-08-21 12:23:02,115 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1815 transitions. Word has length 19 [2021-08-21 12:23:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:02,115 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1815 transitions. [2021-08-21 12:23:02,115 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) [2021-08-21 12:23:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1815 transitions. [2021-08-21 12:23:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:02,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:02,116 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:02,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:02,316 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 [2021-08-21 12:23:02,317 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:02,317 INFO L82 PathProgramCache]: Analyzing trace with hash 333722282, now seen corresponding path program 70 times [2021-08-21 12:23:02,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:02,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129320626] [2021-08-21 12:23:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:02,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:02,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:02,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129320626] [2021-08-21 12:23:02,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129320626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:02,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052659619] [2021-08-21 12:23:02,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:23:02,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:02,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:02,589 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:02,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:23:06,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:23:06,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:23:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:07,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:23:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:07,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052659619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:07,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:07,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:07,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001541734] [2021-08-21 12:23:07,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:07,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:07,676 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) [2021-08-21 12:23:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:08,755 INFO L93 Difference]: Finished difference Result 942 states and 2750 transitions. [2021-08-21 12:23:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:23:08,755 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 [2021-08-21 12:23:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:08,757 INFO L225 Difference]: With dead ends: 942 [2021-08-21 12:23:08,757 INFO L226 Difference]: Without dead ends: 920 [2021-08-21 12:23:08,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1127.3ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:23:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-21 12:23:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 559. [2021-08-21 12:23:08,764 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) [2021-08-21 12:23:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-21 12:23:08,765 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-21 12:23:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:08,765 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-21 12:23:08,765 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) [2021-08-21 12:23:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-21 12:23:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:08,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:08,766 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:08,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 12:23:08,966 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 [2021-08-21 12:23:08,966 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1916573188, now seen corresponding path program 71 times [2021-08-21 12:23:08,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:08,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11308696] [2021-08-21 12:23:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:08,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:09,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:09,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11308696] [2021-08-21 12:23:09,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11308696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:09,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809466750] [2021-08-21 12:23:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:23:09,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:09,234 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:09,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:23:13,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:13,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:23:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:13,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:23:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809466750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:14,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:14,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:14,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67467209] [2021-08-21 12:23:14,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:14,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:14,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:14,305 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) [2021-08-21 12:23:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:15,569 INFO L93 Difference]: Finished difference Result 956 states and 2819 transitions. [2021-08-21 12:23:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:23:15,569 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 [2021-08-21 12:23:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:15,571 INFO L225 Difference]: With dead ends: 956 [2021-08-21 12:23:15,571 INFO L226 Difference]: Without dead ends: 941 [2021-08-21 12:23:15,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1228.8ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:23:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-08-21 12:23:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 564. [2021-08-21 12:23:15,578 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) [2021-08-21 12:23:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1830 transitions. [2021-08-21 12:23:15,579 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1830 transitions. Word has length 19 [2021-08-21 12:23:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:15,579 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 1830 transitions. [2021-08-21 12:23:15,579 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) [2021-08-21 12:23:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1830 transitions. [2021-08-21 12:23:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:15,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:15,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:15,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:15,780 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 [2021-08-21 12:23:15,780 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:15,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1384018488, now seen corresponding path program 72 times [2021-08-21 12:23:15,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:15,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654793675] [2021-08-21 12:23:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:15,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:16,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:16,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654793675] [2021-08-21 12:23:16,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654793675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:16,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040986828] [2021-08-21 12:23:16,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:23:16,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:16,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:16,101 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:16,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:23:20,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:23:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:23:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:20,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:23:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:21,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040986828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:21,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:21,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:21,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107455869] [2021-08-21 12:23:21,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:21,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:21,289 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) [2021-08-21 12:23:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:22,475 INFO L93 Difference]: Finished difference Result 916 states and 2710 transitions. [2021-08-21 12:23:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:23:22,475 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 [2021-08-21 12:23:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:22,477 INFO L225 Difference]: With dead ends: 916 [2021-08-21 12:23:22,477 INFO L226 Difference]: Without dead ends: 901 [2021-08-21 12:23:22,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1231.5ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:23:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-08-21 12:23:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 559. [2021-08-21 12:23:22,483 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) [2021-08-21 12:23:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1806 transitions. [2021-08-21 12:23:22,484 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1806 transitions. Word has length 19 [2021-08-21 12:23:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:22,484 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1806 transitions. [2021-08-21 12:23:22,484 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) [2021-08-21 12:23:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1806 transitions. [2021-08-21 12:23:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:22,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:22,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:22,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:22,685 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 [2021-08-21 12:23:22,686 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash -514267050, now seen corresponding path program 73 times [2021-08-21 12:23:22,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:22,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312498494] [2021-08-21 12:23:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:22,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:22,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:22,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312498494] [2021-08-21 12:23:22,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312498494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:22,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145013905] [2021-08-21 12:23:22,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:23:22,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:22,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:22,917 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:22,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:23:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:27,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:23:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:27,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:23:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:28,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145013905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:28,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:28,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:23:28,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225255663] [2021-08-21 12:23:28,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:23:28,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:23:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:23:28,244 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) [2021-08-21 12:23:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:28,934 INFO L93 Difference]: Finished difference Result 785 states and 2407 transitions. [2021-08-21 12:23:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:23:28,935 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 [2021-08-21 12:23:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:28,936 INFO L225 Difference]: With dead ends: 785 [2021-08-21 12:23:28,936 INFO L226 Difference]: Without dead ends: 742 [2021-08-21 12:23:28,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:23:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-08-21 12:23:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 568. [2021-08-21 12:23:28,942 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) [2021-08-21 12:23:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1840 transitions. [2021-08-21 12:23:28,943 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1840 transitions. Word has length 19 [2021-08-21 12:23:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:28,943 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1840 transitions. [2021-08-21 12:23:28,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1840 transitions. [2021-08-21 12:23:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:28,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:28,944 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:28,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 12:23:29,147 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 [2021-08-21 12:23:29,147 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash 226630284, now seen corresponding path program 74 times [2021-08-21 12:23:29,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:29,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226171330] [2021-08-21 12:23:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:29,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:29,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:29,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226171330] [2021-08-21 12:23:29,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226171330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:29,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355222351] [2021-08-21 12:23:29,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:29,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:29,484 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:29,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:23:34,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:34,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:23:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:34,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-21 12:23:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:35,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355222351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:35,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:35,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:35,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735476620] [2021-08-21 12:23:35,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:35,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:35,006 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) [2021-08-21 12:23:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:36,477 INFO L93 Difference]: Finished difference Result 1049 states and 3042 transitions. [2021-08-21 12:23:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:23:36,477 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 [2021-08-21 12:23:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:36,479 INFO L225 Difference]: With dead ends: 1049 [2021-08-21 12:23:36,479 INFO L226 Difference]: Without dead ends: 1006 [2021-08-21 12:23:36,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1499.0ms TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:23:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-08-21 12:23:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 573. [2021-08-21 12:23:36,487 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) [2021-08-21 12:23:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1864 transitions. [2021-08-21 12:23:36,488 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1864 transitions. Word has length 19 [2021-08-21 12:23:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:36,488 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1864 transitions. [2021-08-21 12:23:36,488 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) [2021-08-21 12:23:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1864 transitions. [2021-08-21 12:23:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:36,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:36,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:36,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:23:36,698 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 [2021-08-21 12:23:36,699 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1221005904, now seen corresponding path program 75 times [2021-08-21 12:23:36,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:36,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953675762] [2021-08-21 12:23:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:36,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:36,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:36,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953675762] [2021-08-21 12:23:36,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953675762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:36,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270103488] [2021-08-21 12:23:36,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:23:36,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:36,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:36,988 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:36,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:23:41,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:23:41,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:23:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:41,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:23:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270103488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:42,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:42,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:42,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317712680] [2021-08-21 12:23:42,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:42,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:42,423 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) [2021-08-21 12:23:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:43,805 INFO L93 Difference]: Finished difference Result 955 states and 2821 transitions. [2021-08-21 12:23:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:23:43,805 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 [2021-08-21 12:23:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:43,807 INFO L225 Difference]: With dead ends: 955 [2021-08-21 12:23:43,807 INFO L226 Difference]: Without dead ends: 940 [2021-08-21 12:23:43,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1389.7ms TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:23:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-08-21 12:23:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 567. [2021-08-21 12:23:43,814 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) [2021-08-21 12:23:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1837 transitions. [2021-08-21 12:23:43,815 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1837 transitions. Word has length 19 [2021-08-21 12:23:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:43,815 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1837 transitions. [2021-08-21 12:23:43,815 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) [2021-08-21 12:23:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1837 transitions. [2021-08-21 12:23:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:43,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:43,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:43,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 12:23:44,025 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 [2021-08-21 12:23:44,025 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash 130145172, now seen corresponding path program 76 times [2021-08-21 12:23:44,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:44,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30736973] [2021-08-21 12:23:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:44,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:44,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:44,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30736973] [2021-08-21 12:23:44,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30736973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:44,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659306105] [2021-08-21 12:23:44,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:23:44,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:44,341 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:44,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:23:49,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:23:49,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:49,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:23:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:49,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2021-08-21 12:23:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:49,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659306105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:49,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:49,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:49,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933437494] [2021-08-21 12:23:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:49,741 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) [2021-08-21 12:23:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:50,382 INFO L93 Difference]: Finished difference Result 973 states and 2943 transitions. [2021-08-21 12:23:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:23:50,382 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 [2021-08-21 12:23:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:50,384 INFO L225 Difference]: With dead ends: 973 [2021-08-21 12:23:50,384 INFO L226 Difference]: Without dead ends: 933 [2021-08-21 12:23:50,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 776.3ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:23:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-08-21 12:23:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 576. [2021-08-21 12:23:50,391 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) [2021-08-21 12:23:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1868 transitions. [2021-08-21 12:23:50,392 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1868 transitions. Word has length 19 [2021-08-21 12:23:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:50,392 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1868 transitions. [2021-08-21 12:23:50,392 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) [2021-08-21 12:23:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1868 transitions. [2021-08-21 12:23:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:50,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:50,393 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:50,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:50,593 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 [2021-08-21 12:23:50,593 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1016676312, now seen corresponding path program 77 times [2021-08-21 12:23:50,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:50,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002271419] [2021-08-21 12:23:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:50,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:50,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:50,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002271419] [2021-08-21 12:23:50,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002271419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:50,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022667584] [2021-08-21 12:23:50,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:23:50,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:50,880 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:50,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:23:55,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:55,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:55,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:23:55,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2021-08-21 12:23:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:56,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022667584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:56,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:56,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:23:56,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877515808] [2021-08-21 12:23:56,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:56,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:56,342 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) [2021-08-21 12:23:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:57,009 INFO L93 Difference]: Finished difference Result 941 states and 2885 transitions. [2021-08-21 12:23:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:23:57,009 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 [2021-08-21 12:23:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:57,011 INFO L225 Difference]: With dead ends: 941 [2021-08-21 12:23:57,011 INFO L226 Difference]: Without dead ends: 926 [2021-08-21 12:23:57,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:23:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-08-21 12:23:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 579. [2021-08-21 12:23:57,017 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) [2021-08-21 12:23:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1879 transitions. [2021-08-21 12:23:57,018 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1879 transitions. Word has length 19 [2021-08-21 12:23:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:57,019 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1879 transitions. [2021-08-21 12:23:57,019 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) [2021-08-21 12:23:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1879 transitions. [2021-08-21 12:23:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:23:57,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:57,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:57,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:57,220 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 [2021-08-21 12:23:57,220 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:57,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1365733514, now seen corresponding path program 78 times [2021-08-21 12:23:57,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:57,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548265785] [2021-08-21 12:23:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:57,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:57,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:57,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548265785] [2021-08-21 12:23:57,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548265785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:57,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319151867] [2021-08-21 12:23:57,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:23:57,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:57,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:57,589 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:57,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:24:02,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:24:02,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:02,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:24:02,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:02,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-21 12:24:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:03,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319151867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:03,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:03,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:03,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500330339] [2021-08-21 12:24:03,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:03,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:03,071 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) [2021-08-21 12:24:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:03,755 INFO L93 Difference]: Finished difference Result 964 states and 2955 transitions. [2021-08-21 12:24:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:03,756 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 [2021-08-21 12:24:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:03,757 INFO L225 Difference]: With dead ends: 964 [2021-08-21 12:24:03,757 INFO L226 Difference]: Without dead ends: 949 [2021-08-21 12:24:03,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:24:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-08-21 12:24:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 584. [2021-08-21 12:24:03,764 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) [2021-08-21 12:24:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1892 transitions. [2021-08-21 12:24:03,765 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1892 transitions. Word has length 19 [2021-08-21 12:24:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:03,766 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1892 transitions. [2021-08-21 12:24:03,766 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) [2021-08-21 12:24:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1892 transitions. [2021-08-21 12:24:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:03,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:03,766 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:03,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 12:24:03,967 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 [2021-08-21 12:24:03,967 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash -978648232, now seen corresponding path program 79 times [2021-08-21 12:24:03,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:03,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540809879] [2021-08-21 12:24:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:03,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:04,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:04,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540809879] [2021-08-21 12:24:04,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540809879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:04,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541983348] [2021-08-21 12:24:04,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:24:04,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:04,262 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:04,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:24:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:09,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:24:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:09,723 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 158 treesize of output 126 [2021-08-21 12:24:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:09,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541983348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:09,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:09,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:09,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439181717] [2021-08-21 12:24:09,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:09,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:09,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:09,860 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) [2021-08-21 12:24:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:11,306 INFO L93 Difference]: Finished difference Result 1097 states and 3254 transitions. [2021-08-21 12:24:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:24:11,306 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 [2021-08-21 12:24:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:11,308 INFO L225 Difference]: With dead ends: 1097 [2021-08-21 12:24:11,308 INFO L226 Difference]: Without dead ends: 1026 [2021-08-21 12:24:11,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1506.2ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:24:11,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-08-21 12:24:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 590. [2021-08-21 12:24:11,316 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) [2021-08-21 12:24:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1913 transitions. [2021-08-21 12:24:11,317 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1913 transitions. Word has length 19 [2021-08-21 12:24:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:11,317 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1913 transitions. [2021-08-21 12:24:11,317 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) [2021-08-21 12:24:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1913 transitions. [2021-08-21 12:24:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:11,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:11,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:11,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:11,518 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 [2021-08-21 12:24:11,518 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:11,518 INFO L82 PathProgramCache]: Analyzing trace with hash 185636056, now seen corresponding path program 80 times [2021-08-21 12:24:11,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:11,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960139428] [2021-08-21 12:24:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:11,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:11,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:11,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960139428] [2021-08-21 12:24:11,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960139428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:11,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654115168] [2021-08-21 12:24:11,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:24:11,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:11,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:11,797 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:11,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:24:16,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:24:16,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:24:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:17,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:24:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:17,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654115168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:17,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:17,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:17,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176996127] [2021-08-21 12:24:17,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:17,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:17,557 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) [2021-08-21 12:24:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:18,467 INFO L93 Difference]: Finished difference Result 1020 states and 3112 transitions. [2021-08-21 12:24:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:24:18,467 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 [2021-08-21 12:24:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:18,469 INFO L225 Difference]: With dead ends: 1020 [2021-08-21 12:24:18,469 INFO L226 Difference]: Without dead ends: 976 [2021-08-21 12:24:18,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 931.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:24:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-21 12:24:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 593. [2021-08-21 12:24:18,479 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) [2021-08-21 12:24:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1928 transitions. [2021-08-21 12:24:18,480 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1928 transitions. Word has length 19 [2021-08-21 12:24:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:18,480 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1928 transitions. [2021-08-21 12:24:18,480 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) [2021-08-21 12:24:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1928 transitions. [2021-08-21 12:24:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:18,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:18,481 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:18,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:18,681 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 [2021-08-21 12:24:18,682 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:18,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1171651860, now seen corresponding path program 81 times [2021-08-21 12:24:18,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:18,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582107695] [2021-08-21 12:24:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:18,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:18,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:18,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582107695] [2021-08-21 12:24:18,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582107695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:18,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438323624] [2021-08-21 12:24:18,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:24:18,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:18,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:18,989 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:18,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:24:23,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:24:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:23,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:24:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:24,538 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 186 treesize of output 150 [2021-08-21 12:24:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:24,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438323624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:24,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:24,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:24,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884923388] [2021-08-21 12:24:24,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:24,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:24,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:24,887 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) [2021-08-21 12:24:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:25,793 INFO L93 Difference]: Finished difference Result 989 states and 3024 transitions. [2021-08-21 12:24:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:25,793 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 [2021-08-21 12:24:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:25,794 INFO L225 Difference]: With dead ends: 989 [2021-08-21 12:24:25,795 INFO L226 Difference]: Without dead ends: 967 [2021-08-21 12:24:25,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:24:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-08-21 12:24:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 593. [2021-08-21 12:24:25,801 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) [2021-08-21 12:24:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1928 transitions. [2021-08-21 12:24:25,802 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1928 transitions. Word has length 19 [2021-08-21 12:24:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:25,802 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1928 transitions. [2021-08-21 12:24:25,803 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) [2021-08-21 12:24:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1928 transitions. [2021-08-21 12:24:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:25,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:25,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:25,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 12:24:26,004 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 [2021-08-21 12:24:26,004 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:26,004 INFO L82 PathProgramCache]: Analyzing trace with hash -266309676, now seen corresponding path program 82 times [2021-08-21 12:24:26,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:26,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763310909] [2021-08-21 12:24:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:26,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:26,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:26,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763310909] [2021-08-21 12:24:26,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763310909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:26,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488438082] [2021-08-21 12:24:26,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:24:26,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:26,341 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:26,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:24:31,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:24:31,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:24:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:31,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-21 12:24:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:32,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488438082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:32,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584350716] [2021-08-21 12:24:32,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:32,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:32,536 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) [2021-08-21 12:24:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:34,537 INFO L93 Difference]: Finished difference Result 1110 states and 3301 transitions. [2021-08-21 12:24:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:24:34,538 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 [2021-08-21 12:24:34,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:34,539 INFO L225 Difference]: With dead ends: 1110 [2021-08-21 12:24:34,539 INFO L226 Difference]: Without dead ends: 1040 [2021-08-21 12:24:34,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2117.2ms TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:24:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-08-21 12:24:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 598. [2021-08-21 12:24:34,547 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) [2021-08-21 12:24:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1950 transitions. [2021-08-21 12:24:34,548 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1950 transitions. Word has length 19 [2021-08-21 12:24:34,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:34,548 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1950 transitions. [2021-08-21 12:24:34,548 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) [2021-08-21 12:24:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1950 transitions. [2021-08-21 12:24:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:34,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:34,549 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:34,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:24:34,749 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 [2021-08-21 12:24:34,749 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash 728065944, now seen corresponding path program 83 times [2021-08-21 12:24:34,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:34,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594142043] [2021-08-21 12:24:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:34,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:35,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:35,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594142043] [2021-08-21 12:24:35,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594142043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:35,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537522804] [2021-08-21 12:24:35,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:24:35,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:35,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:35,050 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:35,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:24:40,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:24:40,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:24:40,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:40,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 115 [2021-08-21 12:24:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:41,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537522804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:41,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:41,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:41,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414502508] [2021-08-21 12:24:41,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:41,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:41,013 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) [2021-08-21 12:24:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:42,072 INFO L93 Difference]: Finished difference Result 1024 states and 3111 transitions. [2021-08-21 12:24:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:42,072 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 [2021-08-21 12:24:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:42,074 INFO L225 Difference]: With dead ends: 1024 [2021-08-21 12:24:42,074 INFO L226 Difference]: Without dead ends: 1009 [2021-08-21 12:24:42,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1197.8ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:24:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-08-21 12:24:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 598. [2021-08-21 12:24:42,081 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) [2021-08-21 12:24:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1950 transitions. [2021-08-21 12:24:42,082 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1950 transitions. Word has length 19 [2021-08-21 12:24:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:42,082 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1950 transitions. [2021-08-21 12:24:42,082 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) [2021-08-21 12:24:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1950 transitions. [2021-08-21 12:24:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:42,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:42,083 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:42,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 12:24:42,283 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 [2021-08-21 12:24:42,283 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:42,284 INFO L82 PathProgramCache]: Analyzing trace with hash 91810380, now seen corresponding path program 84 times [2021-08-21 12:24:42,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:42,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745845039] [2021-08-21 12:24:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:42,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:42,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:42,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745845039] [2021-08-21 12:24:42,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745845039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:42,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799191118] [2021-08-21 12:24:42,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:24:42,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:42,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:42,480 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:42,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:24:47,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:24:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:47,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:24:47,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:48,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 137 [2021-08-21 12:24:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:48,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799191118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:48,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:48,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:48,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797089722] [2021-08-21 12:24:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:48,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:48,528 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) [2021-08-21 12:24:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:49,045 INFO L93 Difference]: Finished difference Result 995 states and 3056 transitions. [2021-08-21 12:24:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:24:49,045 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 [2021-08-21 12:24:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:49,047 INFO L225 Difference]: With dead ends: 995 [2021-08-21 12:24:49,047 INFO L226 Difference]: Without dead ends: 980 [2021-08-21 12:24:49,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:24:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-08-21 12:24:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 594. [2021-08-21 12:24:49,054 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) [2021-08-21 12:24:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1932 transitions. [2021-08-21 12:24:49,055 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1932 transitions. Word has length 19 [2021-08-21 12:24:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:49,055 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1932 transitions. [2021-08-21 12:24:49,055 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) [2021-08-21 12:24:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1932 transitions. [2021-08-21 12:24:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:49,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:49,056 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:49,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 12:24:49,260 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 [2021-08-21 12:24:49,260 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:49,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1609356010, now seen corresponding path program 85 times [2021-08-21 12:24:49,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:49,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030444794] [2021-08-21 12:24:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:49,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:49,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030444794] [2021-08-21 12:24:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030444794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798398206] [2021-08-21 12:24:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:24:49,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:49,558 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:49,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:24:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:24:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:55,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:24:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:55,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798398206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:55,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:55,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:24:55,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131479907] [2021-08-21 12:24:55,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:24:55,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:55,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:24:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:24:55,392 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) [2021-08-21 12:24:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:56,981 INFO L93 Difference]: Finished difference Result 1231 states and 3818 transitions. [2021-08-21 12:24:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:24:56,982 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 [2021-08-21 12:24:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:56,983 INFO L225 Difference]: With dead ends: 1231 [2021-08-21 12:24:56,984 INFO L226 Difference]: Without dead ends: 1167 [2021-08-21 12:24:56,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1455.6ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:24:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-08-21 12:24:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 643. [2021-08-21 12:24:56,992 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) [2021-08-21 12:24:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2094 transitions. [2021-08-21 12:24:56,993 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2094 transitions. Word has length 19 [2021-08-21 12:24:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:56,993 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2094 transitions. [2021-08-21 12:24:56,993 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) [2021-08-21 12:24:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2094 transitions. [2021-08-21 12:24:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:24:56,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:56,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:57,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:57,194 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 [2021-08-21 12:24:57,194 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:57,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash -525593084, now seen corresponding path program 86 times [2021-08-21 12:24:57,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:57,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752565642] [2021-08-21 12:24:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:57,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:57,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:57,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752565642] [2021-08-21 12:24:57,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752565642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:57,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919435052] [2021-08-21 12:24:57,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:24:57,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:57,451 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:57,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:25:02,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:25:02,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:25:02,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:03,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:25:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:03,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919435052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:03,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:03,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:25:03,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009749857] [2021-08-21 12:25:03,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:25:03,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:03,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:25:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:25:03,734 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) [2021-08-21 12:25:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:04,722 INFO L93 Difference]: Finished difference Result 1011 states and 3107 transitions. [2021-08-21 12:25:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:25:04,723 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 [2021-08-21 12:25:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:04,724 INFO L225 Difference]: With dead ends: 1011 [2021-08-21 12:25:04,724 INFO L226 Difference]: Without dead ends: 989 [2021-08-21 12:25:04,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1130.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:25:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-08-21 12:25:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 643. [2021-08-21 12:25:04,732 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) [2021-08-21 12:25:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2094 transitions. [2021-08-21 12:25:04,733 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2094 transitions. Word has length 19 [2021-08-21 12:25:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:04,733 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2094 transitions. [2021-08-21 12:25:04,733 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) [2021-08-21 12:25:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2094 transitions. [2021-08-21 12:25:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:25:04,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:04,734 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:04,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:04,934 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 [2021-08-21 12:25:04,934 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1963554620, now seen corresponding path program 87 times [2021-08-21 12:25:04,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:04,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078611219] [2021-08-21 12:25:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:04,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:05,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:05,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078611219] [2021-08-21 12:25:05,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078611219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:05,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529251408] [2021-08-21 12:25:05,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:25:05,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:05,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:05,225 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:05,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:25:10,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:25:10,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:25:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:11,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2021-08-21 12:25:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:11,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529251408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:11,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:11,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:25:11,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748615960] [2021-08-21 12:25:11,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:25:11,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:25:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:25:11,474 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) [2021-08-21 12:25:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:13,512 INFO L93 Difference]: Finished difference Result 1330 states and 3948 transitions. [2021-08-21 12:25:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:25:13,512 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 [2021-08-21 12:25:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:13,514 INFO L225 Difference]: With dead ends: 1330 [2021-08-21 12:25:13,514 INFO L226 Difference]: Without dead ends: 1253 [2021-08-21 12:25:13,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1979.6ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:25:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-08-21 12:25:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 656. [2021-08-21 12:25:13,524 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) [2021-08-21 12:25:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2162 transitions. [2021-08-21 12:25:13,525 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2162 transitions. Word has length 19 [2021-08-21 12:25:13,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:13,525 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 2162 transitions. [2021-08-21 12:25:13,525 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) [2021-08-21 12:25:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2162 transitions. [2021-08-21 12:25:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:25:13,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:13,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:13,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 12:25:13,726 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 [2021-08-21 12:25:13,726 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash -979929316, now seen corresponding path program 88 times [2021-08-21 12:25:13,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:13,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647592907] [2021-08-21 12:25:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:13,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:14,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:14,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647592907] [2021-08-21 12:25:14,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647592907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:14,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071630619] [2021-08-21 12:25:14,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:25:14,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:14,005 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:14,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:25:19,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:25:19,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:19,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:25:19,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:19,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-21 12:25:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:20,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071630619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:20,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:20,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:25:20,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227031526] [2021-08-21 12:25:20,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:25:20,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:20,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:25:20,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:25:20,516 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) [2021-08-21 12:25:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:23,007 INFO L93 Difference]: Finished difference Result 1192 states and 3579 transitions. [2021-08-21 12:25:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:25:23,007 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 [2021-08-21 12:25:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:23,009 INFO L225 Difference]: With dead ends: 1192 [2021-08-21 12:25:23,009 INFO L226 Difference]: Without dead ends: 1144 [2021-08-21 12:25:23,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2548.7ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:25:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-08-21 12:25:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 658. [2021-08-21 12:25:23,018 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) [2021-08-21 12:25:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2167 transitions. [2021-08-21 12:25:23,020 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2167 transitions. Word has length 19 [2021-08-21 12:25:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:23,020 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2167 transitions. [2021-08-21 12:25:23,020 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) [2021-08-21 12:25:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2167 transitions. [2021-08-21 12:25:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:25:23,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:23,021 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:23,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:23,221 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 [2021-08-21 12:25:23,221 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1234459856, now seen corresponding path program 89 times [2021-08-21 12:25:23,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:23,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551671884] [2021-08-21 12:25:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:23,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:23,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:23,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551671884] [2021-08-21 12:25:23,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551671884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:23,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646105704] [2021-08-21 12:25:23,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:25:23,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:23,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:23,436 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:23,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:25:28,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:25:28,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:25:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:29,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 129 [2021-08-21 12:25:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:29,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646105704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:29,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:29,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:25:29,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788955556] [2021-08-21 12:25:29,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:25:29,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:25:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:25:29,733 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) [2021-08-21 12:25:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:31,135 INFO L93 Difference]: Finished difference Result 1233 states and 3738 transitions. [2021-08-21 12:25:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:25:31,136 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 [2021-08-21 12:25:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:31,137 INFO L225 Difference]: With dead ends: 1233 [2021-08-21 12:25:31,137 INFO L226 Difference]: Without dead ends: 1156 [2021-08-21 12:25:31,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1262.2ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:25:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-08-21 12:25:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 656. [2021-08-21 12:25:31,146 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) [2021-08-21 12:25:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2156 transitions. [2021-08-21 12:25:31,147 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2156 transitions. Word has length 19 [2021-08-21 12:25:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:31,147 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 2156 transitions. [2021-08-21 12:25:31,147 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) [2021-08-21 12:25:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2156 transitions. [2021-08-21 12:25:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:25:31,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:31,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:31,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 12:25:31,348 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 [2021-08-21 12:25:31,348 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash -17426618, now seen corresponding path program 90 times [2021-08-21 12:25:31,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:31,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580721325] [2021-08-21 12:25:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:31,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:31,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:31,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580721325] [2021-08-21 12:25:31,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580721325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:31,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27144968] [2021-08-21 12:25:31,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:25:31,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:31,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:31,609 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:31,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:25:37,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:25:37,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:25:37,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:37,326 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 160 treesize of output 128 [2021-08-21 12:25:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:37,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27144968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:37,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:37,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:25:37,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118400807] [2021-08-21 12:25:37,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:25:37,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:25:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:25:37,820 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) [2021-08-21 12:25:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:38,705 INFO L93 Difference]: Finished difference Result 1087 states and 3309 transitions. [2021-08-21 12:25:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:25:38,705 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 [2021-08-21 12:25:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:38,707 INFO L225 Difference]: With dead ends: 1087 [2021-08-21 12:25:38,707 INFO L226 Difference]: Without dead ends: 1072 [2021-08-21 12:25:38,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 933.1ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:25:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-08-21 12:25:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 660. [2021-08-21 12:25:38,716 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) [2021-08-21 12:25:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2172 transitions. [2021-08-21 12:25:38,717 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2172 transitions. Word has length 19 [2021-08-21 12:25:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:38,717 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2172 transitions. [2021-08-21 12:25:38,717 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) [2021-08-21 12:25:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2172 transitions. [2021-08-21 12:25:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:25:38,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:38,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:38,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 12:25:38,918 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 [2021-08-21 12:25:38,918 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -487333554, now seen corresponding path program 91 times [2021-08-21 12:25:38,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:38,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967446692] [2021-08-21 12:25:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:38,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:39,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:39,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967446692] [2021-08-21 12:25:39,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967446692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:39,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708418774] [2021-08-21 12:25:39,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:25:39,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:39,289 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:39,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:25:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:25:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:45,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:25:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:46,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708418774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:46,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:46,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:25:46,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685077540] [2021-08-21 12:25:46,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:25:46,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:25:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:25:46,028 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) [2021-08-21 12:25:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:48,678 INFO L93 Difference]: Finished difference Result 1282 states and 3768 transitions. [2021-08-21 12:25:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:25:48,678 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 [2021-08-21 12:25:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:48,680 INFO L225 Difference]: With dead ends: 1282 [2021-08-21 12:25:48,680 INFO L226 Difference]: Without dead ends: 1219 [2021-08-21 12:25:48,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2711.0ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:25:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-08-21 12:25:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 659. [2021-08-21 12:25:48,689 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) [2021-08-21 12:25:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2166 transitions. [2021-08-21 12:25:48,690 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2166 transitions. Word has length 19 [2021-08-21 12:25:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:48,690 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 2166 transitions. [2021-08-21 12:25:48,690 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) [2021-08-21 12:25:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2166 transitions. [2021-08-21 12:25:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:25:48,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:48,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:48,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:48,891 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 [2021-08-21 12:25:48,892 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:48,892 INFO L82 PathProgramCache]: Analyzing trace with hash 580445510, now seen corresponding path program 92 times [2021-08-21 12:25:48,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:48,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931530808] [2021-08-21 12:25:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:48,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:49,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:49,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931530808] [2021-08-21 12:25:49,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931530808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:49,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413726715] [2021-08-21 12:25:49,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:25:49,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:49,081 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:49,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:25:54,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:25:54,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:25:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:54,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:25:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:55,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413726715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:55,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:55,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-21 12:25:55,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355773600] [2021-08-21 12:25:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:25:55,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:25:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:25:55,464 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) [2021-08-21 12:25:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:56,448 INFO L93 Difference]: Finished difference Result 1048 states and 3216 transitions. [2021-08-21 12:25:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:25:56,448 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 [2021-08-21 12:25:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:56,450 INFO L225 Difference]: With dead ends: 1048 [2021-08-21 12:25:56,450 INFO L226 Difference]: Without dead ends: 994 [2021-08-21 12:25:56,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1029.7ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:25:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-08-21 12:25:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 652. [2021-08-21 12:25:56,457 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) [2021-08-21 12:25:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2131 transitions. [2021-08-21 12:25:56,459 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2131 transitions. Word has length 19 [2021-08-21 12:25:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:56,459 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 2131 transitions. [2021-08-21 12:25:56,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2131 transitions. [2021-08-21 12:25:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:25:56,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:56,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:56,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 12:25:56,660 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 [2021-08-21 12:25:56,660 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash -199447666, now seen corresponding path program 93 times [2021-08-21 12:25:56,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:56,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083125131] [2021-08-21 12:25:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:56,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:56,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:56,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083125131] [2021-08-21 12:25:56,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083125131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:56,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57581190] [2021-08-21 12:25:56,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:25:56,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:56,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:56,854 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:56,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:26:02,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:26:02,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:26:02,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:03,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-21 12:26:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:03,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57581190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:03,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:03,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:26:03,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093354890] [2021-08-21 12:26:03,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:26:03,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:03,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:26:03,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:26:03,193 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) [2021-08-21 12:26:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:03,637 INFO L93 Difference]: Finished difference Result 861 states and 2704 transitions. [2021-08-21 12:26:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:26:03,637 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 [2021-08-21 12:26:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:03,638 INFO L225 Difference]: With dead ends: 861 [2021-08-21 12:26:03,639 INFO L226 Difference]: Without dead ends: 846 [2021-08-21 12:26:03,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:26:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-21 12:26:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 660. [2021-08-21 12:26:03,645 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) [2021-08-21 12:26:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2161 transitions. [2021-08-21 12:26:03,646 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2161 transitions. Word has length 19 [2021-08-21 12:26:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:03,646 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2161 transitions. [2021-08-21 12:26:03,646 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) [2021-08-21 12:26:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2161 transitions. [2021-08-21 12:26:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:03,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:03,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:03,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 12:26:03,848 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 [2021-08-21 12:26:03,849 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash -548504868, now seen corresponding path program 94 times [2021-08-21 12:26:03,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:03,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179684051] [2021-08-21 12:26:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:03,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:04,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:04,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179684051] [2021-08-21 12:26:04,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179684051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:04,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108263223] [2021-08-21 12:26:04,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:26:04,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:04,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:04,120 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:04,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:26:09,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:26:09,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:26:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:10,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:26:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:10,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108263223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:10,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:10,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:26:10,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243318394] [2021-08-21 12:26:10,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:26:10,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:10,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:26:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:26:10,524 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) [2021-08-21 12:26:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:11,202 INFO L93 Difference]: Finished difference Result 976 states and 2959 transitions. [2021-08-21 12:26:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:26:11,202 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 [2021-08-21 12:26:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:11,204 INFO L225 Difference]: With dead ends: 976 [2021-08-21 12:26:11,204 INFO L226 Difference]: Without dead ends: 918 [2021-08-21 12:26:11,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 678.4ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:26:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-08-21 12:26:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 657. [2021-08-21 12:26:11,212 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) [2021-08-21 12:26:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2150 transitions. [2021-08-21 12:26:11,213 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2150 transitions. Word has length 19 [2021-08-21 12:26:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:11,213 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 2150 transitions. [2021-08-21 12:26:11,213 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) [2021-08-21 12:26:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2150 transitions. [2021-08-21 12:26:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:11,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:11,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:11,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:11,414 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 [2021-08-21 12:26:11,414 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:11,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1600291668, now seen corresponding path program 95 times [2021-08-21 12:26:11,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:11,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740056876] [2021-08-21 12:26:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:11,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:11,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:11,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740056876] [2021-08-21 12:26:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740056876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:11,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080620306] [2021-08-21 12:26:11,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:26:11,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:11,637 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:11,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:26:17,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:26:17,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:17,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:26:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:17,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2021-08-21 12:26:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:18,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080620306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:18,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:18,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 12:26:18,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267480568] [2021-08-21 12:26:18,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:26:18,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:26:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:26:18,033 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) [2021-08-21 12:26:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:18,413 INFO L93 Difference]: Finished difference Result 843 states and 2660 transitions. [2021-08-21 12:26:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:26:18,414 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 [2021-08-21 12:26:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:18,415 INFO L225 Difference]: With dead ends: 843 [2021-08-21 12:26:18,415 INFO L226 Difference]: Without dead ends: 828 [2021-08-21 12:26:18,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:26:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-08-21 12:26:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 654. [2021-08-21 12:26:18,422 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) [2021-08-21 12:26:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2142 transitions. [2021-08-21 12:26:18,423 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2142 transitions. Word has length 19 [2021-08-21 12:26:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:18,423 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 2142 transitions. [2021-08-21 12:26:18,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:26:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2142 transitions. [2021-08-21 12:26:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:18,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:18,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:18,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:18,624 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 [2021-08-21 12:26:18,625 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1293533208, now seen corresponding path program 96 times [2021-08-21 12:26:18,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:18,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723868374] [2021-08-21 12:26:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:18,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:18,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:18,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723868374] [2021-08-21 12:26:18,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723868374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:18,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691735638] [2021-08-21 12:26:18,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:26:18,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:18,839 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:18,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:26:24,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:26:24,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:26:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:25,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-21 12:26:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:25,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691735638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:25,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:25,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:26:25,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959241812] [2021-08-21 12:26:25,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:26:25,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:26:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:26:25,317 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) [2021-08-21 12:26:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:25,761 INFO L93 Difference]: Finished difference Result 878 states and 2755 transitions. [2021-08-21 12:26:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:26:25,762 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 [2021-08-21 12:26:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:25,763 INFO L225 Difference]: With dead ends: 878 [2021-08-21 12:26:25,763 INFO L226 Difference]: Without dead ends: 863 [2021-08-21 12:26:25,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:26:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-08-21 12:26:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 660. [2021-08-21 12:26:25,770 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) [2021-08-21 12:26:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2168 transitions. [2021-08-21 12:26:25,771 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2168 transitions. Word has length 19 [2021-08-21 12:26:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:25,771 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2168 transitions. [2021-08-21 12:26:25,771 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) [2021-08-21 12:26:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2168 transitions. [2021-08-21 12:26:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:25,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:25,772 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:25,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:25,972 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 [2021-08-21 12:26:25,972 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash 944476006, now seen corresponding path program 97 times [2021-08-21 12:26:25,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:25,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926905775] [2021-08-21 12:26:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:25,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:26,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:26,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926905775] [2021-08-21 12:26:26,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926905775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:26,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052670118] [2021-08-21 12:26:26,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:26:26,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:26,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:26,216 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:26,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:26:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:32,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:26:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:32,692 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 163 treesize of output 129 [2021-08-21 12:26:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:32,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052670118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:32,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:32,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:26:33,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940070798] [2021-08-21 12:26:33,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:26:33,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:26:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:26:33,000 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) [2021-08-21 12:26:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:33,861 INFO L93 Difference]: Finished difference Result 1018 states and 3066 transitions. [2021-08-21 12:26:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:26:33,861 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 [2021-08-21 12:26:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:33,863 INFO L225 Difference]: With dead ends: 1018 [2021-08-21 12:26:33,863 INFO L226 Difference]: Without dead ends: 975 [2021-08-21 12:26:33,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 894.3ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:26:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-08-21 12:26:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 660. [2021-08-21 12:26:33,870 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) [2021-08-21 12:26:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2168 transitions. [2021-08-21 12:26:33,871 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2168 transitions. Word has length 19 [2021-08-21 12:26:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:33,872 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2168 transitions. [2021-08-21 12:26:33,872 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) [2021-08-21 12:26:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2168 transitions. [2021-08-21 12:26:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:33,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:33,872 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:33,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:34,073 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 [2021-08-21 12:26:34,073 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:34,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2015418284, now seen corresponding path program 98 times [2021-08-21 12:26:34,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:34,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113624453] [2021-08-21 12:26:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:34,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:34,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:34,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113624453] [2021-08-21 12:26:34,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113624453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:34,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021102195] [2021-08-21 12:26:34,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:26:34,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:34,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:34,345 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:34,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:26:40,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:26:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:26:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:40,723 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 162 treesize of output 132 [2021-08-21 12:26:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021102195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:41,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:41,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:26:41,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522585014] [2021-08-21 12:26:41,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:26:41,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:26:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:26:41,052 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) [2021-08-21 12:26:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:41,935 INFO L93 Difference]: Finished difference Result 1104 states and 3303 transitions. [2021-08-21 12:26:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:26:41,935 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 [2021-08-21 12:26:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:41,937 INFO L225 Difference]: With dead ends: 1104 [2021-08-21 12:26:41,937 INFO L226 Difference]: Without dead ends: 1089 [2021-08-21 12:26:41,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:26:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-21 12:26:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 662. [2021-08-21 12:26:41,945 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) [2021-08-21 12:26:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2177 transitions. [2021-08-21 12:26:41,946 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2177 transitions. Word has length 19 [2021-08-21 12:26:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:41,946 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2177 transitions. [2021-08-21 12:26:41,946 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) [2021-08-21 12:26:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2177 transitions. [2021-08-21 12:26:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:41,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:41,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:41,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 12:26:42,147 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 [2021-08-21 12:26:42,147 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash -741263430, now seen corresponding path program 99 times [2021-08-21 12:26:42,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:42,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433491320] [2021-08-21 12:26:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:42,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:42,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:42,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433491320] [2021-08-21 12:26:42,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433491320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:42,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132575446] [2021-08-21 12:26:42,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:26:42,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:42,454 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:42,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:26:48,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:26:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:26:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:48,961 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 169 treesize of output 137 [2021-08-21 12:26:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:49,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132575446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:49,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:49,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:26:49,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383904344] [2021-08-21 12:26:49,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:26:49,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:49,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:26:49,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:26:49,369 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) [2021-08-21 12:26:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:50,301 INFO L93 Difference]: Finished difference Result 1080 states and 3255 transitions. [2021-08-21 12:26:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:26:50,301 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 [2021-08-21 12:26:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:50,314 INFO L225 Difference]: With dead ends: 1080 [2021-08-21 12:26:50,314 INFO L226 Difference]: Without dead ends: 1065 [2021-08-21 12:26:50,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 886.7ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:26:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-08-21 12:26:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 658. [2021-08-21 12:26:50,323 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) [2021-08-21 12:26:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2159 transitions. [2021-08-21 12:26:50,324 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2159 transitions. Word has length 19 [2021-08-21 12:26:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:50,324 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2159 transitions. [2021-08-21 12:26:50,324 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) [2021-08-21 12:26:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2159 transitions. [2021-08-21 12:26:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:50,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:50,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:50,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 12:26:50,525 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 [2021-08-21 12:26:50,525 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash 841587476, now seen corresponding path program 100 times [2021-08-21 12:26:50,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:50,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965415091] [2021-08-21 12:26:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:50,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:50,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:50,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965415091] [2021-08-21 12:26:50,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965415091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:50,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431369971] [2021-08-21 12:26:50,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:26:50,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:50,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:50,756 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:50,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:26:56,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:26:56,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:26:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:26:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:26:57,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:26:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:57,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431369971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:57,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:26:57,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:26:57,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756699293] [2021-08-21 12:26:57,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:26:57,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:26:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:26:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:26:57,731 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) [2021-08-21 12:26:58,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:26:58,720 INFO L93 Difference]: Finished difference Result 1014 states and 3082 transitions. [2021-08-21 12:26:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:26:58,721 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 [2021-08-21 12:26:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:26:58,723 INFO L225 Difference]: With dead ends: 1014 [2021-08-21 12:26:58,723 INFO L226 Difference]: Without dead ends: 986 [2021-08-21 12:26:58,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1004.4ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:26:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-08-21 12:26:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 663. [2021-08-21 12:26:58,731 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) [2021-08-21 12:26:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 2183 transitions. [2021-08-21 12:26:58,732 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 2183 transitions. Word has length 19 [2021-08-21 12:26:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:26:58,732 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 2183 transitions. [2021-08-21 12:26:58,732 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) [2021-08-21 12:26:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 2183 transitions. [2021-08-21 12:26:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:26:58,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:26:58,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:26:58,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 12:26:58,933 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 [2021-08-21 12:26:58,933 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:26:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:26:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1835963096, now seen corresponding path program 101 times [2021-08-21 12:26:58,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:26:58,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406494547] [2021-08-21 12:26:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:26:58,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:26:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:26:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:26:59,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:26:59,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406494547] [2021-08-21 12:26:59,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406494547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:26:59,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101197656] [2021-08-21 12:26:59,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:26:59,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:26:59,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:26:59,205 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:26:59,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:27:05,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:27:05,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:27:05,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:05,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:27:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:06,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101197656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:06,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:06,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:27:06,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680583204] [2021-08-21 12:27:06,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:27:06,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:27:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:06,263 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) [2021-08-21 12:27:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:06,898 INFO L93 Difference]: Finished difference Result 1009 states and 3067 transitions. [2021-08-21 12:27:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:27:06,899 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 [2021-08-21 12:27:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:06,900 INFO L225 Difference]: With dead ends: 1009 [2021-08-21 12:27:06,900 INFO L226 Difference]: Without dead ends: 994 [2021-08-21 12:27:06,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:27:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-08-21 12:27:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 658. [2021-08-21 12:27:06,908 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) [2021-08-21 12:27:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2159 transitions. [2021-08-21 12:27:06,909 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2159 transitions. Word has length 19 [2021-08-21 12:27:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:06,909 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2159 transitions. [2021-08-21 12:27:06,909 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) [2021-08-21 12:27:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2159 transitions. [2021-08-21 12:27:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:27:06,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:06,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:06,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:07,111 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 [2021-08-21 12:27:07,111 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:07,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1589252762, now seen corresponding path program 102 times [2021-08-21 12:27:07,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:07,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379189427] [2021-08-21 12:27:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:07,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:07,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379189427] [2021-08-21 12:27:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379189427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012414116] [2021-08-21 12:27:07,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:27:07,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:07,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:07,417 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:07,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:27:13,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:27:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:13,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:27:13,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:14,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:27:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:14,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012414116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:14,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:14,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:27:14,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205801493] [2021-08-21 12:27:14,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:27:14,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:14,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:27:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:14,373 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) [2021-08-21 12:27:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:15,824 INFO L93 Difference]: Finished difference Result 1206 states and 3547 transitions. [2021-08-21 12:27:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:27:15,824 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 [2021-08-21 12:27:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:15,826 INFO L225 Difference]: With dead ends: 1206 [2021-08-21 12:27:15,826 INFO L226 Difference]: Without dead ends: 1128 [2021-08-21 12:27:15,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1342.1ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:27:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-08-21 12:27:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 674. [2021-08-21 12:27:15,835 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) [2021-08-21 12:27:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2220 transitions. [2021-08-21 12:27:15,836 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2220 transitions. Word has length 19 [2021-08-21 12:27:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:15,836 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 2220 transitions. [2021-08-21 12:27:15,836 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) [2021-08-21 12:27:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2220 transitions. [2021-08-21 12:27:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:27:15,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:15,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:15,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:16,037 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 [2021-08-21 12:27:16,037 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash -848355428, now seen corresponding path program 103 times [2021-08-21 12:27:16,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:16,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040051467] [2021-08-21 12:27:16,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:16,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:16,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:16,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040051467] [2021-08-21 12:27:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040051467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:16,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362731073] [2021-08-21 12:27:16,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:27:16,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:16,299 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:16,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:27:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:22,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:27:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:22,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:27:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:23,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362731073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:23,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:23,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:27:23,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943417357] [2021-08-21 12:27:23,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:27:23,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:27:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:23,495 INFO L87 Difference]: Start difference. First operand 674 states and 2220 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) [2021-08-21 12:27:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:24,452 INFO L93 Difference]: Finished difference Result 1224 states and 3617 transitions. [2021-08-21 12:27:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:27:24,453 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 [2021-08-21 12:27:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:24,455 INFO L225 Difference]: With dead ends: 1224 [2021-08-21 12:27:24,455 INFO L226 Difference]: Without dead ends: 1181 [2021-08-21 12:27:24,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1015.4ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:27:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-08-21 12:27:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 680. [2021-08-21 12:27:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.313696612665685) internal successors, (2250), 679 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2250 transitions. [2021-08-21 12:27:24,465 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2250 transitions. Word has length 19 [2021-08-21 12:27:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:24,465 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2250 transitions. [2021-08-21 12:27:24,465 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) [2021-08-21 12:27:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2250 transitions. [2021-08-21 12:27:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:27:24,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:24,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:24,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 12:27:24,668 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 [2021-08-21 12:27:24,669 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash 146020192, now seen corresponding path program 104 times [2021-08-21 12:27:24,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:24,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888778080] [2021-08-21 12:27:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:24,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:24,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:24,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888778080] [2021-08-21 12:27:24,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888778080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:24,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013668448] [2021-08-21 12:27:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:27:24,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:24,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:24,915 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:24,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:27:31,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:27:31,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:31,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:27:31,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:31,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2021-08-21 12:27:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:32,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013668448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:32,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:32,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:27:32,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330303118] [2021-08-21 12:27:32,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:27:32,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:27:32,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:32,061 INFO L87 Difference]: Start difference. First operand 680 states and 2250 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) [2021-08-21 12:27:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:33,109 INFO L93 Difference]: Finished difference Result 1091 states and 3297 transitions. [2021-08-21 12:27:33,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:27:33,109 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 [2021-08-21 12:27:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:33,111 INFO L225 Difference]: With dead ends: 1091 [2021-08-21 12:27:33,111 INFO L226 Difference]: Without dead ends: 1076 [2021-08-21 12:27:33,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1042.0ms TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:27:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-08-21 12:27:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 678. [2021-08-21 12:27:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.310192023633678) internal successors, (2241), 677 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2241 transitions. [2021-08-21 12:27:33,120 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2241 transitions. Word has length 19 [2021-08-21 12:27:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:33,120 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 2241 transitions. [2021-08-21 12:27:33,120 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) [2021-08-21 12:27:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2241 transitions. [2021-08-21 12:27:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:27:33,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:33,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:33,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:33,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:33,321 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash 232755118, now seen corresponding path program 105 times [2021-08-21 12:27:33,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:33,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984916650] [2021-08-21 12:27:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:33,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:33,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:33,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984916650] [2021-08-21 12:27:33,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984916650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:33,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774312999] [2021-08-21 12:27:33,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:27:33,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:33,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:33,568 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:33,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:27:39,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:27:39,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:27:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:40,444 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 [2021-08-21 12:27:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:40,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774312999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:40,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:40,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:27:40,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747611826] [2021-08-21 12:27:40,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:27:40,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:27:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:40,613 INFO L87 Difference]: Start difference. First operand 678 states and 2241 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) [2021-08-21 12:27:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:41,258 INFO L93 Difference]: Finished difference Result 1011 states and 3141 transitions. [2021-08-21 12:27:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:27:41,259 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 [2021-08-21 12:27:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:41,260 INFO L225 Difference]: With dead ends: 1011 [2021-08-21 12:27:41,260 INFO L226 Difference]: Without dead ends: 996 [2021-08-21 12:27:41,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:27:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-08-21 12:27:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 687. [2021-08-21 12:27:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3221574344023326) internal successors, (2279), 686 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2279 transitions. [2021-08-21 12:27:41,270 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2279 transitions. Word has length 19 [2021-08-21 12:27:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:41,270 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 2279 transitions. [2021-08-21 12:27:41,270 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) [2021-08-21 12:27:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2279 transitions. [2021-08-21 12:27:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:27:41,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:41,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:41,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 12:27:41,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:41,471 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:41,471 INFO L82 PathProgramCache]: Analyzing trace with hash -116302084, now seen corresponding path program 106 times [2021-08-21 12:27:41,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:41,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055069243] [2021-08-21 12:27:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:41,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:41,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:41,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055069243] [2021-08-21 12:27:41,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055069243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:41,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958078379] [2021-08-21 12:27:41,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:27:41,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:41,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:41,715 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:41,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:27:48,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:27:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:27:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:48,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:27:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:49,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958078379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:49,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:49,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:27:49,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473285806] [2021-08-21 12:27:49,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:27:49,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:27:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:49,128 INFO L87 Difference]: Start difference. First operand 687 states and 2279 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) [2021-08-21 12:27:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,976 INFO L93 Difference]: Finished difference Result 1019 states and 3151 transitions. [2021-08-21 12:27:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:27:49,977 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 [2021-08-21 12:27:49,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,978 INFO L225 Difference]: With dead ends: 1019 [2021-08-21 12:27:49,978 INFO L226 Difference]: Without dead ends: 991 [2021-08-21 12:27:49,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 909.2ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:27:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-08-21 12:27:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 687. [2021-08-21 12:27:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3221574344023326) internal successors, (2279), 686 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2279 transitions. [2021-08-21 12:27:49,987 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2279 transitions. Word has length 19 [2021-08-21 12:27:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,987 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 2279 transitions. [2021-08-21 12:27:49,987 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) [2021-08-21 12:27:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2279 transitions. [2021-08-21 12:27:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:27:49,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 12:27:50,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-08-21 12:27:50,189 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1218770922, now seen corresponding path program 107 times [2021-08-21 12:27:50,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540993816] [2021-08-21 12:27:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:50,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540993816] [2021-08-21 12:27:50,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540993816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:50,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429351136] [2021-08-21 12:27:50,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:27:50,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:50,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:50,460 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:50,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:27:56,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:27:56,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:27:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:27:56,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:27:57,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:27:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429351136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:57,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:27:57,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:27:57,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114091601] [2021-08-21 12:27:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:27:57,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:27:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:27:57,806 INFO L87 Difference]: Start difference. First operand 687 states and 2279 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) [2021-08-21 12:27:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,480 INFO L93 Difference]: Finished difference Result 966 states and 3025 transitions. [2021-08-21 12:27:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:27:58,481 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 [2021-08-21 12:27:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,482 INFO L225 Difference]: With dead ends: 966 [2021-08-21 12:27:58,482 INFO L226 Difference]: Without dead ends: 951 [2021-08-21 12:27:58,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:27:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-21 12:27:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 687. [2021-08-21 12:27:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.3221574344023326) internal successors, (2279), 686 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2279 transitions. [2021-08-21 12:27:58,491 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2279 transitions. Word has length 19 [2021-08-21 12:27:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,491 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 2279 transitions. [2021-08-21 12:27:58,491 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) [2021-08-21 12:27:58,492 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2279 transitions. [2021-08-21 12:27:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:27:58,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,492 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:58,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 12:27:58,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-08-21 12:27:58,693 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -219190614, now seen corresponding path program 108 times [2021-08-21 12:27:58,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611765504] [2021-08-21 12:27:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:58,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:58,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611765504] [2021-08-21 12:27:58,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611765504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:27:58,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652995321] [2021-08-21 12:27:58,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:27:58,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:27:58,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:58,917 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:27:58,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:28:05,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:28:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:28:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:28:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:06,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652995321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:06,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:06,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:28:06,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433423419] [2021-08-21 12:28:06,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:28:06,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:28:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:06,221 INFO L87 Difference]: Start difference. First operand 687 states and 2279 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) [2021-08-21 12:28:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:07,160 INFO L93 Difference]: Finished difference Result 1069 states and 3294 transitions. [2021-08-21 12:28:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:28:07,161 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 [2021-08-21 12:28:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:07,162 INFO L225 Difference]: With dead ends: 1069 [2021-08-21 12:28:07,162 INFO L226 Difference]: Without dead ends: 1054 [2021-08-21 12:28:07,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 885.4ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:28:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-08-21 12:28:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 688. [2021-08-21 12:28:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.3260553129548764) internal successors, (2285), 687 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2285 transitions. [2021-08-21 12:28:07,172 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2285 transitions. Word has length 19 [2021-08-21 12:28:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:07,172 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 2285 transitions. [2021-08-21 12:28:07,172 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) [2021-08-21 12:28:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2285 transitions. [2021-08-21 12:28:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:28:07,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:07,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:07,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 12:28:07,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-21 12:28:07,374 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash 775185006, now seen corresponding path program 109 times [2021-08-21 12:28:07,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:07,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835261663] [2021-08-21 12:28:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:07,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:07,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:07,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835261663] [2021-08-21 12:28:07,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835261663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:07,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199524835] [2021-08-21 12:28:07,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:28:07,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:07,633 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:07,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:28:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:28:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:14,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2021-08-21 12:28:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:15,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199524835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:15,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:15,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:28:15,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097920922] [2021-08-21 12:28:15,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:28:15,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:28:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:15,234 INFO L87 Difference]: Start difference. First operand 688 states and 2285 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) [2021-08-21 12:28:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:16,415 INFO L93 Difference]: Finished difference Result 1030 states and 3199 transitions. [2021-08-21 12:28:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:28:16,415 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 [2021-08-21 12:28:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:16,417 INFO L225 Difference]: With dead ends: 1030 [2021-08-21 12:28:16,417 INFO L226 Difference]: Without dead ends: 993 [2021-08-21 12:28:16,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1223.7ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:28:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-08-21 12:28:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 686. [2021-08-21 12:28:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3226277372262776) internal successors, (2276), 685 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2276 transitions. [2021-08-21 12:28:16,426 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2276 transitions. Word has length 19 [2021-08-21 12:28:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:16,426 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 2276 transitions. [2021-08-21 12:28:16,426 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) [2021-08-21 12:28:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2276 transitions. [2021-08-21 12:28:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:28:16,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:16,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:16,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 12:28:16,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:16,628 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:16,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:16,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2057121722, now seen corresponding path program 110 times [2021-08-21 12:28:16,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:16,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924841014] [2021-08-21 12:28:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:16,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:16,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:16,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924841014] [2021-08-21 12:28:16,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924841014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:16,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503175047] [2021-08-21 12:28:16,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:16,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:16,841 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:16,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:28:23,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:23,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:28:23,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:28:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503175047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:24,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:24,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:28:24,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006553469] [2021-08-21 12:28:24,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:28:24,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:28:24,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:24,221 INFO L87 Difference]: Start difference. First operand 686 states and 2276 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) [2021-08-21 12:28:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:25,029 INFO L93 Difference]: Finished difference Result 1086 states and 3451 transitions. [2021-08-21 12:28:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:28:25,029 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 [2021-08-21 12:28:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:25,031 INFO L225 Difference]: With dead ends: 1086 [2021-08-21 12:28:25,031 INFO L226 Difference]: Without dead ends: 1029 [2021-08-21 12:28:25,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:28:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-08-21 12:28:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 694. [2021-08-21 12:28:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 3.3376623376623376) internal successors, (2313), 693 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2313 transitions. [2021-08-21 12:28:25,041 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2313 transitions. Word has length 19 [2021-08-21 12:28:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:25,041 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2313 transitions. [2021-08-21 12:28:25,041 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) [2021-08-21 12:28:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2313 transitions. [2021-08-21 12:28:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:28:25,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:25,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:25,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:25,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-08-21 12:28:25,242 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:25,243 INFO L82 PathProgramCache]: Analyzing trace with hash 273405148, now seen corresponding path program 111 times [2021-08-21 12:28:25,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:25,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614107925] [2021-08-21 12:28:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:25,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:25,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:25,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614107925] [2021-08-21 12:28:25,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614107925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:25,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529023597] [2021-08-21 12:28:25,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:25,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:25,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:25,475 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:25,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:28:32,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:28:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:32,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:28:32,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:32,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-08-21 12:28:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:33,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529023597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:33,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:33,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:28:33,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091623070] [2021-08-21 12:28:33,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:28:33,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:28:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:33,032 INFO L87 Difference]: Start difference. First operand 694 states and 2313 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) [2021-08-21 12:28:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:34,262 INFO L93 Difference]: Finished difference Result 1136 states and 3515 transitions. [2021-08-21 12:28:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:28:34,262 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 [2021-08-21 12:28:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:34,264 INFO L225 Difference]: With dead ends: 1136 [2021-08-21 12:28:34,264 INFO L226 Difference]: Without dead ends: 1121 [2021-08-21 12:28:34,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1141.2ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:28:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-08-21 12:28:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 702. [2021-08-21 12:28:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.348074179743224) internal successors, (2347), 701 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2347 transitions. [2021-08-21 12:28:34,275 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2347 transitions. Word has length 19 [2021-08-21 12:28:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:34,275 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2347 transitions. [2021-08-21 12:28:34,275 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) [2021-08-21 12:28:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2347 transitions. [2021-08-21 12:28:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:28:34,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:34,276 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:34,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 12:28:34,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:34,476 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1267780768, now seen corresponding path program 112 times [2021-08-21 12:28:34,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:34,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984203084] [2021-08-21 12:28:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:34,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:34,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:34,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984203084] [2021-08-21 12:28:34,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984203084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:34,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251155301] [2021-08-21 12:28:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:34,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:34,713 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:34,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:28:41,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:41,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:28:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:41,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 113 [2021-08-21 12:28:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:42,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251155301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:42,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:42,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:28:42,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662209467] [2021-08-21 12:28:42,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:28:42,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:28:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:42,321 INFO L87 Difference]: Start difference. First operand 702 states and 2347 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) [2021-08-21 12:28:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:43,272 INFO L93 Difference]: Finished difference Result 1113 states and 3439 transitions. [2021-08-21 12:28:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:28:43,272 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 [2021-08-21 12:28:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:43,274 INFO L225 Difference]: With dead ends: 1113 [2021-08-21 12:28:43,274 INFO L226 Difference]: Without dead ends: 1098 [2021-08-21 12:28:43,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:28:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-08-21 12:28:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 699. [2021-08-21 12:28:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.340974212034384) internal successors, (2332), 698 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2332 transitions. [2021-08-21 12:28:43,285 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2332 transitions. Word has length 19 [2021-08-21 12:28:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:43,285 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2332 transitions. [2021-08-21 12:28:43,285 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) [2021-08-21 12:28:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2332 transitions. [2021-08-21 12:28:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:28:43,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:43,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:43,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:43,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:43,493 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash 550460654, now seen corresponding path program 113 times [2021-08-21 12:28:43,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:43,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497199308] [2021-08-21 12:28:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:43,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:43,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:43,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497199308] [2021-08-21 12:28:43,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497199308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:43,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156680889] [2021-08-21 12:28:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:43,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:43,737 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:43,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:28:50,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:50,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:50,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:28:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:50,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 123 [2021-08-21 12:28:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:51,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156680889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:51,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:51,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 12:28:51,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101966159] [2021-08-21 12:28:51,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:28:51,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:28:51,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:51,401 INFO L87 Difference]: Start difference. First operand 699 states and 2332 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) [2021-08-21 12:28:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:52,372 INFO L93 Difference]: Finished difference Result 1103 states and 3405 transitions. [2021-08-21 12:28:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:28:52,373 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 [2021-08-21 12:28:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:52,374 INFO L225 Difference]: With dead ends: 1103 [2021-08-21 12:28:52,374 INFO L226 Difference]: Without dead ends: 1088 [2021-08-21 12:28:52,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 987.1ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:28:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-08-21 12:28:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 695. [2021-08-21 12:28:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.3400576368876083) internal successors, (2318), 694 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2318 transitions. [2021-08-21 12:28:52,384 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2318 transitions. Word has length 19 [2021-08-21 12:28:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:52,384 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 2318 transitions. [2021-08-21 12:28:52,384 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) [2021-08-21 12:28:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2318 transitions. [2021-08-21 12:28:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:28:52,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:52,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:52,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:52,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:52,586 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash 796313972, now seen corresponding path program 114 times [2021-08-21 12:28:52,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:52,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510337516] [2021-08-21 12:28:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:52,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:52,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:52,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510337516] [2021-08-21 12:28:52,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510337516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:52,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115150639] [2021-08-21 12:28:52,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:52,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:52,838 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:28:52,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:28:53,427 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:28:53,439 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:28:54,464 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:28:54,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:54,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:54,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:54,665 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 1,while executing Executor. [2021-08-21 12:28:54,666 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:28:54,666 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:28:54,666 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 12:28:54,669 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:28:54,670 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:28:54,671 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:28:54 BasicIcfg [2021-08-21 12:28:54,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:28:54,672 INFO L168 Benchmark]: Toolchain (without parser) took 713171.44 ms. Allocated memory was 198.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 178.0 MB in the beginning and 438.6 MB in the end (delta: -260.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-21 12:28:54,672 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 198.2 MB. Free memory was 179.3 MB in the beginning and 179.2 MB in the end (delta: 112.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:28:54,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.30 ms. Allocated memory is still 198.2 MB. Free memory was 177.8 MB in the beginning and 176.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:28:54,672 INFO L168 Benchmark]: Boogie Preprocessor took 22.66 ms. Allocated memory is still 198.2 MB. Free memory was 176.4 MB in the beginning and 175.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:28:54,672 INFO L168 Benchmark]: RCFGBuilder took 485.52 ms. Allocated memory is still 198.2 MB. Free memory was 175.3 MB in the beginning and 173.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. [2021-08-21 12:28:54,673 INFO L168 Benchmark]: TraceAbstraction took 712635.52 ms. Allocated memory was 198.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 173.0 MB in the beginning and 438.6 MB in the end (delta: -265.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-21 12:28:54,673 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 0.10 ms. Allocated memory is still 198.2 MB. Free memory was 179.3 MB in the beginning and 179.2 MB in the end (delta: 112.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.30 ms. Allocated memory is still 198.2 MB. Free memory was 177.8 MB in the beginning and 176.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.66 ms. Allocated memory is still 198.2 MB. Free memory was 176.4 MB in the beginning and 175.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 485.52 ms. Allocated memory is still 198.2 MB. Free memory was 175.3 MB in the beginning and 173.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 712635.52 ms. Allocated memory was 198.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 173.0 MB in the beginning and 438.6 MB in the end (delta: -265.6 MB). Peak memory consumption was 1.1 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 with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 712568.5ms, OverallIterations: 296, TraceHistogramMax: 1, EmptinessCheckTime: 164.0ms, AutomataDifference: 138118.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13367 SDtfs, 29790 SDslu, 66426 SDs, 0 SdLazy, 77236 SolverSat, 3159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31625.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6943 GetRequests, 2301 SyntacticMatches, 94 SemanticMatches, 4548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12211 ImplicationChecksByTransitivity, 134999.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=702occurred in iteration=293, InterpolantAutomatonStates: 2834, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1683.1ms AutomataMinimizationTime, 295 MinimizatonAttempts, 70201 StatesRemovedByMinimization, 295 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 716.5ms SsaConstructionTime, 2497.1ms SatisfiabilityAnalysisTime, 127972.3ms InterpolantComputationTime, 7884 NumberOfCodeBlocks, 7879 NumberOfCodeBlocksAsserted, 526 NumberOfCheckSat, 7457 ConstructedInterpolants, 0 QuantifiedInterpolants, 108177 SizeOfPredicates, 1687 NumberOfNonLiveVariables, 10330 ConjunctsInSsa, 3782 ConjunctsInUnsatCore, 427 InterpolantComputations, 172 PerfectInterpolantSequences, 146/625 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