/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:12:48,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:12:48,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:12:48,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:12:48,506 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 12:12:48,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:12:48,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:12:48,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:12:48,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:12:48,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:12:48,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:12:48,527 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:12:48,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:12:48,528 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:12:48,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:12:48,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:12:48,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:12:48,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:12:48,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:12:48,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:12:48,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:12:48,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:12:48,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:12:48,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:12:48,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:12:48,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:12:48,811 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:12:48,812 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:12:48,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl [2021-08-21 12:12:48,820 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-subst.wvr.bpl' [2021-08-21 12:12:48,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:12:48,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:12:48,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:12:48,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:12:48,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:12:48,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:12:48,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:12:48,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:12:48,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:12:48,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:12:48,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:12:48,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:12:48,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:12:48,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/1) ... [2021-08-21 12:12:48,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:12:48,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:48,914 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 12:12:48,935 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 12:12:48,945 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:12:48,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:12:48,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:12:48,946 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:12:48,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:12:48,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:12:48,946 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:12:48,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:12:48,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:12:48,947 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:12:48,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:12:48,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:12:48,948 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 12:12:49,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:12:49,166 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 12:12:49,167 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 12:12:49,167 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 12:12:49,167 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-21 12:12:49,169 INFO L202 PluginConnector]: Adding new model array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:12:49 BoogieIcfgContainer [2021-08-21 12:12:49,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:12:49,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:12:49,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:12:49,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:12:49,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:48" (1/2) ... [2021-08-21 12:12:49,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b33bbbf and model type array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:12:49, skipping insertion in model container [2021-08-21 12:12:49,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:12:49" (2/2) ... [2021-08-21 12:12:49,184 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-subst.wvr.bpl [2021-08-21 12:12:49,188 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:12:49,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:12:49,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:12:49,189 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:12:49,233 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:12:49,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:12:49,268 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 12:12:49,268 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:12:49,278 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-08-21 12:12:49,298 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:12:49,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:49,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:49,308 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2084038676, now seen corresponding path program 1 times [2021-08-21 12:12:49,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:49,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276202610] [2021-08-21 12:12:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:49,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:49,494 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 12:12:49,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:49,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276202610] [2021-08-21 12:12:49,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276202610] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:49,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:49,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:12:49,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245951986] [2021-08-21 12:12:49,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:49,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:49,516 INFO L87 Difference]: Start difference. First operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:49,640 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-08-21 12:12:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:12:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:49,657 INFO L225 Difference]: With dead ends: 139 [2021-08-21 12:12:49,657 INFO L226 Difference]: Without dead ends: 135 [2021-08-21 12:12:49,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-21 12:12:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-08-21 12:12:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-08-21 12:12:49,704 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-08-21 12:12:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:49,705 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-08-21 12:12:49,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-08-21 12:12:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:12:49,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:49,709 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:49,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:12:49,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:49,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1063699516, now seen corresponding path program 2 times [2021-08-21 12:12:49,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:49,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039735505] [2021-08-21 12:12:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:49,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:49,821 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 12:12:49,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:49,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039735505] [2021-08-21 12:12:49,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039735505] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:49,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:49,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:12:49,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116705426] [2021-08-21 12:12:49,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:49,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:49,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:49,829 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:49,925 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-08-21 12:12:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:12:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:49,928 INFO L225 Difference]: With dead ends: 156 [2021-08-21 12:12:49,928 INFO L226 Difference]: Without dead ends: 152 [2021-08-21 12:12:49,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-21 12:12:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-08-21 12:12:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-08-21 12:12:49,943 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-08-21 12:12:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:49,944 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-08-21 12:12:49,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-08-21 12:12:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:12:49,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:49,946 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:49,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:12:49,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash 285001590, now seen corresponding path program 3 times [2021-08-21 12:12:49,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:49,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867109818] [2021-08-21 12:12:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:49,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:50,013 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 12:12:50,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:50,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867109818] [2021-08-21 12:12:50,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867109818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:50,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:50,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:12:50,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217151372] [2021-08-21 12:12:50,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:50,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:50,015 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:50,096 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-08-21 12:12:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:12:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:50,100 INFO L225 Difference]: With dead ends: 169 [2021-08-21 12:12:50,103 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 12:12:50,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 12:12:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-08-21 12:12:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-08-21 12:12:50,117 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-08-21 12:12:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:50,118 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-08-21 12:12:50,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-08-21 12:12:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:12:50,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:50,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:50,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:12:50,127 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash -791696276, now seen corresponding path program 4 times [2021-08-21 12:12:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:50,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453255456] [2021-08-21 12:12:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:50,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:50,212 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 12:12:50,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:50,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453255456] [2021-08-21 12:12:50,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453255456] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:50,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:50,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:12:50,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268854268] [2021-08-21 12:12:50,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:50,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:50,216 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:50,297 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-08-21 12:12:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:12:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:50,299 INFO L225 Difference]: With dead ends: 173 [2021-08-21 12:12:50,299 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 12:12:50,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 12:12:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-08-21 12:12:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-08-21 12:12:50,313 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-08-21 12:12:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:50,313 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-08-21 12:12:50,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-08-21 12:12:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:12:50,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:50,314 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:50,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:12:50,314 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1403389292, now seen corresponding path program 5 times [2021-08-21 12:12:50,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:50,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261545324] [2021-08-21 12:12:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:50,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:50,374 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 12:12:50,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:50,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261545324] [2021-08-21 12:12:50,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261545324] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:50,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:50,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:12:50,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184421949] [2021-08-21 12:12:50,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:50,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:50,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:50,377 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:50,466 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-08-21 12:12:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:12:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:50,467 INFO L225 Difference]: With dead ends: 176 [2021-08-21 12:12:50,468 INFO L226 Difference]: Without dead ends: 172 [2021-08-21 12:12:50,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-21 12:12:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-08-21 12:12:50,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-21 12:12:50,473 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-08-21 12:12:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:50,473 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-21 12:12:50,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-21 12:12:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:12:50,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:50,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:50,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:12:50,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904610, now seen corresponding path program 6 times [2021-08-21 12:12:50,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:50,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256241898] [2021-08-21 12:12:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:50,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:50,528 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 12:12:50,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:50,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256241898] [2021-08-21 12:12:50,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256241898] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:50,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:50,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:12:50,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012354245] [2021-08-21 12:12:50,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:50,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:50,530 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:50,600 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-08-21 12:12:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:12:50,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:12:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:50,601 INFO L225 Difference]: With dead ends: 174 [2021-08-21 12:12:50,601 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 12:12:50,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 12:12:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-08-21 12:12:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-21 12:12:50,604 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-08-21 12:12:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:50,604 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-21 12:12:50,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-21 12:12:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:50,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:50,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:50,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:12:50,605 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1483068478, now seen corresponding path program 1 times [2021-08-21 12:12:50,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:50,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999569744] [2021-08-21 12:12:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:50,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:50,671 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 12:12:50,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:50,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999569744] [2021-08-21 12:12:50,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999569744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:50,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713336264] [2021-08-21 12:12:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:50,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:50,677 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 12:12:50,698 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 12:12:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:50,958 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 12:12:50,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713336264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:50,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:50,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 12:12:50,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845961445] [2021-08-21 12:12:50,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:50,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:50,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:50,959 INFO L87 Difference]: Start difference. First operand 100 states and 282 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 12:12:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:51,361 INFO L93 Difference]: Finished difference Result 239 states and 656 transitions. [2021-08-21 12:12:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:12:51,362 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 15 [2021-08-21 12:12:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:51,363 INFO L225 Difference]: With dead ends: 239 [2021-08-21 12:12:51,363 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:12:51,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:12:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:12:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 123. [2021-08-21 12:12:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.9836065573770494) internal successors, (364), 122 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 364 transitions. [2021-08-21 12:12:51,366 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 364 transitions. Word has length 15 [2021-08-21 12:12:51,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:51,366 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 364 transitions. [2021-08-21 12:12:51,367 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 12:12:51,367 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 364 transitions. [2021-08-21 12:12:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:51,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:51,367 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:51,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 12:12:51,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:51,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:51,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash -181850573, now seen corresponding path program 1 times [2021-08-21 12:12:51,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:51,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627538136] [2021-08-21 12:12:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:51,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:51,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:51,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627538136] [2021-08-21 12:12:51,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627538136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:51,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064030771] [2021-08-21 12:12:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:51,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:51,633 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 12:12:51,676 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 12:12:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:51,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:51,796 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 12:12:51,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064030771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:51,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:51,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:12:51,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505883784] [2021-08-21 12:12:51,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:51,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:51,798 INFO L87 Difference]: Start difference. First operand 123 states and 364 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:51,903 INFO L93 Difference]: Finished difference Result 194 states and 538 transitions. [2021-08-21 12:12:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:12:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:51,904 INFO L225 Difference]: With dead ends: 194 [2021-08-21 12:12:51,904 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 12:12:51,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:12:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 12:12:51,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2021-08-21 12:12:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.945736434108527) internal successors, (380), 129 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 380 transitions. [2021-08-21 12:12:51,908 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 380 transitions. Word has length 15 [2021-08-21 12:12:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:51,908 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 380 transitions. [2021-08-21 12:12:51,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 380 transitions. [2021-08-21 12:12:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:51,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:51,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:51,927 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 12:12:52,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-21 12:12:52,122 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash 479878778, now seen corresponding path program 1 times [2021-08-21 12:12:52,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:52,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414065782] [2021-08-21 12:12:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:52,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:52,200 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 12:12:52,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414065782] [2021-08-21 12:12:52,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414065782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209493043] [2021-08-21 12:12:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:52,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:52,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:52,206 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 12:12:52,224 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 12:12:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:52,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:12:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:52,433 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 12:12:52,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209493043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:52,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:52,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:12:52,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140181880] [2021-08-21 12:12:52,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:12:52,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:52,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:12:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:12:52,434 INFO L87 Difference]: Start difference. First operand 130 states and 380 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:52,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:52,673 INFO L93 Difference]: Finished difference Result 194 states and 551 transitions. [2021-08-21 12:12:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:12:52,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:52,675 INFO L225 Difference]: With dead ends: 194 [2021-08-21 12:12:52,675 INFO L226 Difference]: Without dead ends: 189 [2021-08-21 12:12:52,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-21 12:12:52,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-08-21 12:12:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.965034965034965) internal successors, (424), 143 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 424 transitions. [2021-08-21 12:12:52,679 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 424 transitions. Word has length 15 [2021-08-21 12:12:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:52,679 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 424 transitions. [2021-08-21 12:12:52,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 424 transitions. [2021-08-21 12:12:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:52,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:52,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:52,696 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 12:12:52,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:52,897 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash -667350326, now seen corresponding path program 2 times [2021-08-21 12:12:52,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:52,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064567317] [2021-08-21 12:12:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:52,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:53,013 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 12:12:53,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:53,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064567317] [2021-08-21 12:12:53,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064567317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:53,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273987573] [2021-08-21 12:12:53,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:53,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:53,014 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 12:12:53,015 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 12:12:53,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:53,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:53,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:12:53,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:53,243 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 12:12:53,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273987573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:53,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:53,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:12:53,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721829326] [2021-08-21 12:12:53,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:12:53,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:12:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:12:53,245 INFO L87 Difference]: Start difference. First operand 144 states and 424 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 12:12:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:53,597 INFO L93 Difference]: Finished difference Result 209 states and 595 transitions. [2021-08-21 12:12:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:12:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:53,600 INFO L225 Difference]: With dead ends: 209 [2021-08-21 12:12:53,600 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 12:12:53,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:12:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 12:12:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 150. [2021-08-21 12:12:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.966442953020134) internal successors, (442), 149 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 442 transitions. [2021-08-21 12:12:53,607 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 442 transitions. Word has length 15 [2021-08-21 12:12:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:53,607 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 442 transitions. [2021-08-21 12:12:53,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 12:12:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 442 transitions. [2021-08-21 12:12:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:53,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:53,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:53,627 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 12:12:53,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:53,825 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:53,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1754827456, now seen corresponding path program 3 times [2021-08-21 12:12:53,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:53,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319464403] [2021-08-21 12:12:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:53,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:53,908 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 12:12:53,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:53,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319464403] [2021-08-21 12:12:53,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319464403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:53,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49353135] [2021-08-21 12:12:53,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:53,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:53,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:53,909 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 12:12:53,928 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 12:12:54,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:12:54,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:54,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:12:54,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:54,181 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 12:12:54,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49353135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:54,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:54,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:12:54,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173569851] [2021-08-21 12:12:54,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:54,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:54,184 INFO L87 Difference]: Start difference. First operand 150 states and 442 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:54,464 INFO L93 Difference]: Finished difference Result 308 states and 838 transitions. [2021-08-21 12:12:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:12:54,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:54,466 INFO L225 Difference]: With dead ends: 308 [2021-08-21 12:12:54,466 INFO L226 Difference]: Without dead ends: 298 [2021-08-21 12:12:54,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-21 12:12:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 152. [2021-08-21 12:12:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.9536423841059603) internal successors, (446), 151 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 446 transitions. [2021-08-21 12:12:54,472 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 446 transitions. Word has length 15 [2021-08-21 12:12:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:54,472 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 446 transitions. [2021-08-21 12:12:54,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 446 transitions. [2021-08-21 12:12:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:54,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:54,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:54,492 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 12:12:54,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:12:54,691 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:54,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1920533253, now seen corresponding path program 2 times [2021-08-21 12:12:54,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:54,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293331612] [2021-08-21 12:12:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:54,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:54,750 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 12:12:54,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:54,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293331612] [2021-08-21 12:12:54,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293331612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:54,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75335685] [2021-08-21 12:12:54,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:54,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:54,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:54,752 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 12:12:54,753 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 12:12:54,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:12:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:55,013 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 12:12:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75335685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:55,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:55,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:12:55,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135630937] [2021-08-21 12:12:55,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:55,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:55,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:55,016 INFO L87 Difference]: Start difference. First operand 152 states and 446 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:55,620 INFO L93 Difference]: Finished difference Result 324 states and 854 transitions. [2021-08-21 12:12:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:12:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:55,622 INFO L225 Difference]: With dead ends: 324 [2021-08-21 12:12:55,622 INFO L226 Difference]: Without dead ends: 272 [2021-08-21 12:12:55,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:12:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-21 12:12:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 165. [2021-08-21 12:12:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.0304878048780486) internal successors, (497), 164 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 497 transitions. [2021-08-21 12:12:55,627 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 497 transitions. Word has length 15 [2021-08-21 12:12:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:55,627 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 497 transitions. [2021-08-21 12:12:55,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 497 transitions. [2021-08-21 12:12:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:55,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:55,628 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:55,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:55,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:55,845 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash 261809974, now seen corresponding path program 4 times [2021-08-21 12:12:55,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:55,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277741722] [2021-08-21 12:12:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:55,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:55,907 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 12:12:55,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:55,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277741722] [2021-08-21 12:12:55,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277741722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:55,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904085814] [2021-08-21 12:12:55,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:55,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:55,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:55,909 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 12:12:55,909 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 12:12:56,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:12:56,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:12:56,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:56,161 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 12:12:56,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904085814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:56,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:56,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:12:56,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146437591] [2021-08-21 12:12:56,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:56,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:56,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:56,162 INFO L87 Difference]: Start difference. First operand 165 states and 497 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:56,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:56,655 INFO L93 Difference]: Finished difference Result 276 states and 775 transitions. [2021-08-21 12:12:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:12:56,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:56,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:56,657 INFO L225 Difference]: With dead ends: 276 [2021-08-21 12:12:56,657 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 12:12:56,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:12:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 12:12:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 168. [2021-08-21 12:12:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.035928143712575) internal successors, (507), 167 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 507 transitions. [2021-08-21 12:12:56,662 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 507 transitions. Word has length 15 [2021-08-21 12:12:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:56,662 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 507 transitions. [2021-08-21 12:12:56,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 507 transitions. [2021-08-21 12:12:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:56,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:56,663 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:56,682 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 12:12:56,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:56,877 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1191253196, now seen corresponding path program 2 times [2021-08-21 12:12:56,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:56,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003517482] [2021-08-21 12:12:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:56,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:56,923 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 12:12:56,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:56,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003517482] [2021-08-21 12:12:56,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003517482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:56,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138568543] [2021-08-21 12:12:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:56,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:56,925 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 12:12:56,926 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 12:12:57,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:57,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:57,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:12:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:57,189 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 12:12:57,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138568543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:57,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:57,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:12:57,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446698804] [2021-08-21 12:12:57,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:57,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:57,190 INFO L87 Difference]: Start difference. First operand 168 states and 507 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:57,303 INFO L93 Difference]: Finished difference Result 249 states and 681 transitions. [2021-08-21 12:12:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:57,304 INFO L225 Difference]: With dead ends: 249 [2021-08-21 12:12:57,305 INFO L226 Difference]: Without dead ends: 238 [2021-08-21 12:12:57,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:12:57,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-21 12:12:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 168. [2021-08-21 12:12:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.035928143712575) internal successors, (507), 167 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 507 transitions. [2021-08-21 12:12:57,309 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 507 transitions. Word has length 15 [2021-08-21 12:12:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:57,309 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 507 transitions. [2021-08-21 12:12:57,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:12:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 507 transitions. [2021-08-21 12:12:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:57,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:57,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:57,339 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 12:12:57,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:12:57,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1996868015, now seen corresponding path program 3 times [2021-08-21 12:12:57,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:57,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411715658] [2021-08-21 12:12:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:57,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:57,593 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 12:12:57,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:57,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411715658] [2021-08-21 12:12:57,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411715658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:57,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085600000] [2021-08-21 12:12:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:57,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:57,594 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 12:12:57,595 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 12:12:57,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:12:57,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:57,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:57,861 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 12:12:57,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085600000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:57,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:57,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 12:12:57,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346331588] [2021-08-21 12:12:57,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:12:57,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:12:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:12:57,864 INFO L87 Difference]: Start difference. First operand 168 states and 507 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:57,951 INFO L93 Difference]: Finished difference Result 236 states and 664 transitions. [2021-08-21 12:12:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:12:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:57,954 INFO L225 Difference]: With dead ends: 236 [2021-08-21 12:12:57,954 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:12:57,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:12:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:12:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 166. [2021-08-21 12:12:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.0303030303030303) internal successors, (500), 165 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 500 transitions. [2021-08-21 12:12:57,959 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 500 transitions. Word has length 15 [2021-08-21 12:12:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:57,961 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 500 transitions. [2021-08-21 12:12:57,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 500 transitions. [2021-08-21 12:12:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:57,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:57,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:57,980 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 12:12:58,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:12:58,169 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash -69278572, now seen corresponding path program 5 times [2021-08-21 12:12:58,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:58,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604926608] [2021-08-21 12:12:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:58,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:58,235 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 12:12:58,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:58,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604926608] [2021-08-21 12:12:58,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604926608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:58,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734624197] [2021-08-21 12:12:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:12:58,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:58,245 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 12:12:58,250 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 12:12:58,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:58,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:12:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:58,537 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 12:12:58,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734624197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:58,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:58,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:12:58,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470240017] [2021-08-21 12:12:58,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:58,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:58,539 INFO L87 Difference]: Start difference. First operand 166 states and 500 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:58,903 INFO L93 Difference]: Finished difference Result 232 states and 665 transitions. [2021-08-21 12:12:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:12:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:58,906 INFO L225 Difference]: With dead ends: 232 [2021-08-21 12:12:58,906 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 12:12:58,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:58,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 12:12:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 166. [2021-08-21 12:12:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.0242424242424244) internal successors, (499), 165 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 499 transitions. [2021-08-21 12:12:58,912 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 499 transitions. Word has length 15 [2021-08-21 12:12:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:58,913 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 499 transitions. [2021-08-21 12:12:58,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 499 transitions. [2021-08-21 12:12:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:58,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:58,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:58,930 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 12:12:59,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:12:59,125 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -73912190, now seen corresponding path program 3 times [2021-08-21 12:12:59,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:59,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972094740] [2021-08-21 12:12:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:59,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:59,184 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 12:12:59,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:59,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972094740] [2021-08-21 12:12:59,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972094740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:59,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055018602] [2021-08-21 12:12:59,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:59,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:59,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:59,185 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 12:12:59,190 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 12:12:59,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:12:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:59,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:12:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:59,467 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 12:12:59,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055018602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:59,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:59,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:12:59,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919773509] [2021-08-21 12:12:59,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:59,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:59,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:59,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:59,468 INFO L87 Difference]: Start difference. First operand 166 states and 499 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:59,581 INFO L93 Difference]: Finished difference Result 229 states and 640 transitions. [2021-08-21 12:12:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:12:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:59,582 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:12:59,582 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 12:12:59,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:12:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 12:12:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 166. [2021-08-21 12:12:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.0242424242424244) internal successors, (499), 165 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 499 transitions. [2021-08-21 12:12:59,587 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 499 transitions. Word has length 15 [2021-08-21 12:12:59,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:59,587 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 499 transitions. [2021-08-21 12:12:59,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 499 transitions. [2021-08-21 12:12:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:12:59,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:59,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:59,606 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 12:12:59,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:12:59,804 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:12:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1421752138, now seen corresponding path program 6 times [2021-08-21 12:12:59,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:59,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747502319] [2021-08-21 12:12:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:59,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:59,907 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 12:12:59,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:59,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747502319] [2021-08-21 12:12:59,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747502319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:59,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374534624] [2021-08-21 12:12:59,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:59,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:59,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:59,909 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 12:12:59,909 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 12:13:00,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:00,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:00,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:00,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374534624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:00,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:00,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:00,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116465416] [2021-08-21 12:13:00,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:00,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:00,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:00,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:00,216 INFO L87 Difference]: Start difference. First operand 166 states and 499 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:00,615 INFO L93 Difference]: Finished difference Result 270 states and 780 transitions. [2021-08-21 12:13:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:13:00,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:00,617 INFO L225 Difference]: With dead ends: 270 [2021-08-21 12:13:00,617 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 12:13:00,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 377.5ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 12:13:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 167. [2021-08-21 12:13:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 3.0180722891566263) internal successors, (501), 166 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 501 transitions. [2021-08-21 12:13:00,621 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 501 transitions. Word has length 15 [2021-08-21 12:13:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:00,621 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 501 transitions. [2021-08-21 12:13:00,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 501 transitions. [2021-08-21 12:13:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:00,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:00,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:00,644 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 12:13:00,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:13:00,837 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 4848560, now seen corresponding path program 7 times [2021-08-21 12:13:00,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:00,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616985875] [2021-08-21 12:13:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:00,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:00,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:00,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616985875] [2021-08-21 12:13:00,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616985875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:00,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926788967] [2021-08-21 12:13:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:00,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:00,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:00,949 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 12:13:00,950 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 12:13:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:01,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:01,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:01,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926788967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:01,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:01,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:01,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106078367] [2021-08-21 12:13:01,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:01,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:01,285 INFO L87 Difference]: Start difference. First operand 167 states and 501 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:01,695 INFO L93 Difference]: Finished difference Result 263 states and 737 transitions. [2021-08-21 12:13:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:13:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:01,697 INFO L225 Difference]: With dead ends: 263 [2021-08-21 12:13:01,697 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 12:13:01,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 12:13:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 169. [2021-08-21 12:13:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.017857142857143) internal successors, (507), 168 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 507 transitions. [2021-08-21 12:13:01,701 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 507 transitions. Word has length 15 [2021-08-21 12:13:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:01,701 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 507 transitions. [2021-08-21 12:13:01,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 507 transitions. [2021-08-21 12:13:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:01,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:01,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:01,728 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 12:13:01,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:01,917 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash 684906930, now seen corresponding path program 4 times [2021-08-21 12:13:01,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:01,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676716929] [2021-08-21 12:13:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:01,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:01,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:01,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676716929] [2021-08-21 12:13:01,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676716929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:01,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864515858] [2021-08-21 12:13:01,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:01,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:01,985 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 12:13:01,986 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 12:13:02,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:02,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864515858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:02,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 12:13:02,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286560853] [2021-08-21 12:13:02,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:02,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:02,313 INFO L87 Difference]: Start difference. First operand 169 states and 507 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 12:13:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:02,646 INFO L93 Difference]: Finished difference Result 273 states and 743 transitions. [2021-08-21 12:13:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:13:02,646 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 15 [2021-08-21 12:13:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:02,648 INFO L225 Difference]: With dead ends: 273 [2021-08-21 12:13:02,648 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 12:13:02,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 12:13:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2021-08-21 12:13:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 3.0122699386503067) internal successors, (491), 163 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 491 transitions. [2021-08-21 12:13:02,652 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 491 transitions. Word has length 15 [2021-08-21 12:13:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:02,652 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 491 transitions. [2021-08-21 12:13:02,652 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 12:13:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 491 transitions. [2021-08-21 12:13:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:02,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:02,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:02,675 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 12:13:02,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:02,857 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:02,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:02,857 INFO L82 PathProgramCache]: Analyzing trace with hash -575624838, now seen corresponding path program 8 times [2021-08-21 12:13:02,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:02,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346145757] [2021-08-21 12:13:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:02,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:02,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:02,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346145757] [2021-08-21 12:13:02,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346145757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:02,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319954578] [2021-08-21 12:13:02,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:02,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:02,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:02,933 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 12:13:02,934 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 12:13:03,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:03,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:03,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319954578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:03,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:03,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:03,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044833905] [2021-08-21 12:13:03,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:03,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:03,295 INFO L87 Difference]: Start difference. First operand 164 states and 491 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:03,641 INFO L93 Difference]: Finished difference Result 221 states and 626 transitions. [2021-08-21 12:13:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:03,642 INFO L225 Difference]: With dead ends: 221 [2021-08-21 12:13:03,642 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 12:13:03,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 12:13:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 161. [2021-08-21 12:13:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.0) internal successors, (480), 160 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 480 transitions. [2021-08-21 12:13:03,646 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 480 transitions. Word has length 15 [2021-08-21 12:13:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:03,646 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 480 transitions. [2021-08-21 12:13:03,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 480 transitions. [2021-08-21 12:13:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:03,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:03,646 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:03,667 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 12:13:03,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:03,855 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1908872692, now seen corresponding path program 5 times [2021-08-21 12:13:03,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:03,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464099484] [2021-08-21 12:13:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:03,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:03,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:03,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464099484] [2021-08-21 12:13:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464099484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:03,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956799367] [2021-08-21 12:13:03,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:03,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:03,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:03,900 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 12:13:03,901 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 12:13:04,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:04,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:04,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:04,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956799367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:04,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:04,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:13:04,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279935020] [2021-08-21 12:13:04,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:04,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:04,222 INFO L87 Difference]: Start difference. First operand 161 states and 480 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 12:13:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:04,484 INFO L93 Difference]: Finished difference Result 274 states and 770 transitions. [2021-08-21 12:13:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:13:04,485 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 15 [2021-08-21 12:13:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:04,486 INFO L225 Difference]: With dead ends: 274 [2021-08-21 12:13:04,486 INFO L226 Difference]: Without dead ends: 221 [2021-08-21 12:13:04,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-21 12:13:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 158. [2021-08-21 12:13:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.9872611464968153) internal successors, (469), 157 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 469 transitions. [2021-08-21 12:13:04,490 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 469 transitions. Word has length 15 [2021-08-21 12:13:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:04,490 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 469 transitions. [2021-08-21 12:13:04,490 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 12:13:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 469 transitions. [2021-08-21 12:13:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:04,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:04,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:04,507 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 12:13:04,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 12:13:04,701 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1057004902, now seen corresponding path program 9 times [2021-08-21 12:13:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:04,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437019709] [2021-08-21 12:13:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:04,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:04,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:04,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437019709] [2021-08-21 12:13:04,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437019709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:04,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380235277] [2021-08-21 12:13:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:04,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:04,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:04,779 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 12:13:04,779 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 12:13:04,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:13:04,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:04,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:04,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:05,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380235277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:05,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:05,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:05,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98374185] [2021-08-21 12:13:05,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:05,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:05,172 INFO L87 Difference]: Start difference. First operand 158 states and 469 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:05,596 INFO L93 Difference]: Finished difference Result 294 states and 796 transitions. [2021-08-21 12:13:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:13:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:05,598 INFO L225 Difference]: With dead ends: 294 [2021-08-21 12:13:05,598 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 12:13:05,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:13:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 12:13:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 160. [2021-08-21 12:13:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9748427672955975) internal successors, (473), 159 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 473 transitions. [2021-08-21 12:13:05,602 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 473 transitions. Word has length 15 [2021-08-21 12:13:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:05,603 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 473 transitions. [2021-08-21 12:13:05,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 473 transitions. [2021-08-21 12:13:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:05,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:05,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:05,623 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 12:13:05,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:05,821 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1744944912, now seen corresponding path program 10 times [2021-08-21 12:13:05,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:05,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208365317] [2021-08-21 12:13:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:05,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:05,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:05,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208365317] [2021-08-21 12:13:05,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208365317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:05,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093712458] [2021-08-21 12:13:05,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:05,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:05,884 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 12:13:05,884 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 12:13:06,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:06,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:06,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:06,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:06,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093712458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:06,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:06,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:06,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719832303] [2021-08-21 12:13:06,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:06,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:06,286 INFO L87 Difference]: Start difference. First operand 160 states and 473 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 12:13:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:06,766 INFO L93 Difference]: Finished difference Result 354 states and 928 transitions. [2021-08-21 12:13:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:13:06,766 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 15 [2021-08-21 12:13:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:06,767 INFO L225 Difference]: With dead ends: 354 [2021-08-21 12:13:06,767 INFO L226 Difference]: Without dead ends: 338 [2021-08-21 12:13:06,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:13:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-21 12:13:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 161. [2021-08-21 12:13:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.975) internal successors, (476), 160 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 476 transitions. [2021-08-21 12:13:06,772 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 476 transitions. Word has length 15 [2021-08-21 12:13:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:06,772 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 476 transitions. [2021-08-21 12:13:06,772 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 12:13:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 476 transitions. [2021-08-21 12:13:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:06,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:06,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:06,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:06,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:06,987 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1620579162, now seen corresponding path program 6 times [2021-08-21 12:13:06,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:06,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470780797] [2021-08-21 12:13:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:06,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:07,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:07,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470780797] [2021-08-21 12:13:07,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470780797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:07,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909431680] [2021-08-21 12:13:07,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:07,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:07,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:07,043 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 12:13:07,046 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 12:13:07,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:07,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:07,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:07,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909431680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:07,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:07,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:13:07,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968573131] [2021-08-21 12:13:07,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:07,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:07,381 INFO L87 Difference]: Start difference. First operand 161 states and 476 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 12:13:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:07,605 INFO L93 Difference]: Finished difference Result 251 states and 682 transitions. [2021-08-21 12:13:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:07,605 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 15 [2021-08-21 12:13:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:07,606 INFO L225 Difference]: With dead ends: 251 [2021-08-21 12:13:07,606 INFO L226 Difference]: Without dead ends: 229 [2021-08-21 12:13:07,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:13:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-21 12:13:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 157. [2021-08-21 12:13:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9294871794871793) internal successors, (457), 156 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 457 transitions. [2021-08-21 12:13:07,611 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 457 transitions. Word has length 15 [2021-08-21 12:13:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:07,611 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 457 transitions. [2021-08-21 12:13:07,611 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 12:13:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 457 transitions. [2021-08-21 12:13:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:07,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:07,611 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:07,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:07,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:07,828 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1413856366, now seen corresponding path program 11 times [2021-08-21 12:13:07,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:07,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680167385] [2021-08-21 12:13:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:07,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:07,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:07,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680167385] [2021-08-21 12:13:07,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680167385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:07,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776395031] [2021-08-21 12:13:07,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:07,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:07,886 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 12:13:07,887 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 12:13:08,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:08,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:08,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776395031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:08,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:08,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:08,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368167456] [2021-08-21 12:13:08,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:08,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:08,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:08,313 INFO L87 Difference]: Start difference. First operand 157 states and 457 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:08,641 INFO L93 Difference]: Finished difference Result 274 states and 755 transitions. [2021-08-21 12:13:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:08,643 INFO L225 Difference]: With dead ends: 274 [2021-08-21 12:13:08,643 INFO L226 Difference]: Without dead ends: 262 [2021-08-21 12:13:08,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-21 12:13:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 151. [2021-08-21 12:13:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.9133333333333336) internal successors, (437), 150 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 437 transitions. [2021-08-21 12:13:08,647 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 437 transitions. Word has length 15 [2021-08-21 12:13:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:08,647 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 437 transitions. [2021-08-21 12:13:08,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 437 transitions. [2021-08-21 12:13:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:08,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:08,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:08,677 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 12:13:08,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:13:08,878 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:08,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:08,878 INFO L82 PathProgramCache]: Analyzing trace with hash 738151264, now seen corresponding path program 7 times [2021-08-21 12:13:08,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:08,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256431860] [2021-08-21 12:13:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:08,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:08,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:08,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256431860] [2021-08-21 12:13:08,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256431860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:08,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901437410] [2021-08-21 12:13:08,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:08,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:08,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:08,953 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 12:13:08,963 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 12:13:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:09,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:09,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:09,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901437410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:09,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:09,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:13:09,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771106989] [2021-08-21 12:13:09,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:09,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:09,298 INFO L87 Difference]: Start difference. First operand 151 states and 437 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 12:13:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:09,490 INFO L93 Difference]: Finished difference Result 211 states and 589 transitions. [2021-08-21 12:13:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:13:09,490 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 15 [2021-08-21 12:13:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:09,491 INFO L225 Difference]: With dead ends: 211 [2021-08-21 12:13:09,491 INFO L226 Difference]: Without dead ends: 182 [2021-08-21 12:13:09,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-21 12:13:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2021-08-21 12:13:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.955223880597015) internal successors, (396), 134 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 396 transitions. [2021-08-21 12:13:09,494 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 396 transitions. Word has length 15 [2021-08-21 12:13:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:09,494 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 396 transitions. [2021-08-21 12:13:09,494 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 12:13:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 396 transitions. [2021-08-21 12:13:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:09,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:09,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:09,514 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 12:13:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:13:09,706 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:09,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1226058163, now seen corresponding path program 4 times [2021-08-21 12:13:09,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:09,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801144910] [2021-08-21 12:13:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:09,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:09,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:09,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801144910] [2021-08-21 12:13:09,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801144910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:09,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593812963] [2021-08-21 12:13:09,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:09,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:09,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:09,746 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 12:13:09,765 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 12:13:10,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:10,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:13:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:10,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593812963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:10,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:10,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:13:10,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669717602] [2021-08-21 12:13:10,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:10,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:10,150 INFO L87 Difference]: Start difference. First operand 135 states and 396 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:13:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:10,571 INFO L93 Difference]: Finished difference Result 219 states and 574 transitions. [2021-08-21 12:13:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:13:10,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:10,572 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:13:10,572 INFO L226 Difference]: Without dead ends: 187 [2021-08-21 12:13:10,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:13:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-21 12:13:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2021-08-21 12:13:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.903703703703704) internal successors, (392), 135 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 392 transitions. [2021-08-21 12:13:10,575 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 392 transitions. Word has length 15 [2021-08-21 12:13:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:10,575 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 392 transitions. [2021-08-21 12:13:10,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:13:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 392 transitions. [2021-08-21 12:13:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:10,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:10,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:10,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 12:13:10,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:13:10,776 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash -886565906, now seen corresponding path program 12 times [2021-08-21 12:13:10,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:10,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759530741] [2021-08-21 12:13:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:10,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:10,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:10,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759530741] [2021-08-21 12:13:10,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759530741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:10,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546342628] [2021-08-21 12:13:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:10,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:10,867 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 12:13:10,868 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 12:13:11,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:11,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:11,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546342628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:11,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:11,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:11,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780141506] [2021-08-21 12:13:11,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:11,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:11,299 INFO L87 Difference]: Start difference. First operand 136 states and 392 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 12:13:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:11,855 INFO L93 Difference]: Finished difference Result 224 states and 608 transitions. [2021-08-21 12:13:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:13:11,855 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 15 [2021-08-21 12:13:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:11,856 INFO L225 Difference]: With dead ends: 224 [2021-08-21 12:13:11,856 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 12:13:11,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:13:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 12:13:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 142. [2021-08-21 12:13:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.9290780141843973) internal successors, (413), 141 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 413 transitions. [2021-08-21 12:13:11,860 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 413 transitions. Word has length 15 [2021-08-21 12:13:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:11,860 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 413 transitions. [2021-08-21 12:13:11,860 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 12:13:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 413 transitions. [2021-08-21 12:13:11,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:11,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:11,860 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:11,883 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 12:13:12,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:12,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash 155501367, now seen corresponding path program 5 times [2021-08-21 12:13:12,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:12,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192662431] [2021-08-21 12:13:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:12,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:12,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:12,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192662431] [2021-08-21 12:13:12,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192662431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:12,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164770230] [2021-08-21 12:13:12,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:12,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:12,106 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 12:13:12,107 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 12:13:12,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:13:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164770230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:12,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:13:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902471314] [2021-08-21 12:13:12,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:12,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:12,488 INFO L87 Difference]: Start difference. First operand 142 states and 413 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:12,888 INFO L93 Difference]: Finished difference Result 276 states and 733 transitions. [2021-08-21 12:13:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:13:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:12,889 INFO L225 Difference]: With dead ends: 276 [2021-08-21 12:13:12,889 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 12:13:12,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:13:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 12:13:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 135. [2021-08-21 12:13:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.925373134328358) internal successors, (392), 134 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 392 transitions. [2021-08-21 12:13:12,893 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 392 transitions. Word has length 15 [2021-08-21 12:13:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:12,893 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 392 transitions. [2021-08-21 12:13:12,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 392 transitions. [2021-08-21 12:13:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:12,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:12,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:12,909 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 12:13:13,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:13,094 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1827656875, now seen corresponding path program 6 times [2021-08-21 12:13:13,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:13,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622232328] [2021-08-21 12:13:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:13,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:13,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:13,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622232328] [2021-08-21 12:13:13,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622232328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:13,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073870265] [2021-08-21 12:13:13,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:13,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:13,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:13,138 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 12:13:13,139 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 12:13:13,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:13,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:13:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073870265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:13,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:13,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:13:13,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678551055] [2021-08-21 12:13:13,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:13,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:13,597 INFO L87 Difference]: Start difference. First operand 135 states and 392 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:13,950 INFO L93 Difference]: Finished difference Result 219 states and 608 transitions. [2021-08-21 12:13:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:13:13,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:13,951 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:13:13,951 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 12:13:13,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:13:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 12:13:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 113. [2021-08-21 12:13:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.9017857142857144) internal successors, (325), 112 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 325 transitions. [2021-08-21 12:13:13,954 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 325 transitions. Word has length 15 [2021-08-21 12:13:13,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:13,954 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 325 transitions. [2021-08-21 12:13:13,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 325 transitions. [2021-08-21 12:13:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:13,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:13,964 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:13,981 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 12:13:14,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-21 12:13:14,165 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 401163834, now seen corresponding path program 13 times [2021-08-21 12:13:14,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:14,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514704260] [2021-08-21 12:13:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:14,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:14,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:14,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514704260] [2021-08-21 12:13:14,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514704260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:14,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371249694] [2021-08-21 12:13:14,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:14,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:14,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:14,233 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 12:13:14,260 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 12:13:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:14,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:14,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371249694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:14,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:14,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:14,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15127075] [2021-08-21 12:13:14,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:14,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:14,728 INFO L87 Difference]: Start difference. First operand 113 states and 325 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:15,116 INFO L93 Difference]: Finished difference Result 212 states and 542 transitions. [2021-08-21 12:13:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:15,117 INFO L225 Difference]: With dead ends: 212 [2021-08-21 12:13:15,117 INFO L226 Difference]: Without dead ends: 199 [2021-08-21 12:13:15,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-21 12:13:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 115. [2021-08-21 12:13:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.8684210526315788) internal successors, (327), 114 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 327 transitions. [2021-08-21 12:13:15,120 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 327 transitions. Word has length 15 [2021-08-21 12:13:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:15,120 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 327 transitions. [2021-08-21 12:13:15,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 327 transitions. [2021-08-21 12:13:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:15,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:15,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:15,138 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 12:13:15,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 12:13:15,338 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1528586720, now seen corresponding path program 14 times [2021-08-21 12:13:15,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:15,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389994762] [2021-08-21 12:13:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:15,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:15,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:15,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389994762] [2021-08-21 12:13:15,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389994762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:15,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652668841] [2021-08-21 12:13:15,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:15,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:15,408 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 12:13:15,410 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 12:13:15,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:15,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:15,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652668841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:15,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:15,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:15,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183429745] [2021-08-21 12:13:15,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:15,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:15,919 INFO L87 Difference]: Start difference. First operand 115 states and 327 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:16,420 INFO L93 Difference]: Finished difference Result 176 states and 467 transitions. [2021-08-21 12:13:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:13:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:16,422 INFO L225 Difference]: With dead ends: 176 [2021-08-21 12:13:16,422 INFO L226 Difference]: Without dead ends: 164 [2021-08-21 12:13:16,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:13:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-21 12:13:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 111. [2021-08-21 12:13:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.8727272727272726) internal successors, (316), 110 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 316 transitions. [2021-08-21 12:13:16,424 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 316 transitions. Word has length 15 [2021-08-21 12:13:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:16,424 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 316 transitions. [2021-08-21 12:13:16,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 316 transitions. [2021-08-21 12:13:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:16,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:16,425 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:16,442 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 12:13:16,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:16,642 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:16,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:16,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1544517738, now seen corresponding path program 15 times [2021-08-21 12:13:16,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:16,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927045008] [2021-08-21 12:13:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:16,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:16,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:16,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927045008] [2021-08-21 12:13:16,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927045008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:16,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311676918] [2021-08-21 12:13:16,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:16,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:16,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:16,739 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 12:13:16,768 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 12:13:17,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:13:17,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:17,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:17,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311676918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:17,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:17,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:17,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910587439] [2021-08-21 12:13:17,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:17,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:17,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:17,226 INFO L87 Difference]: Start difference. First operand 111 states and 316 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:17,521 INFO L93 Difference]: Finished difference Result 198 states and 556 transitions. [2021-08-21 12:13:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:17,522 INFO L225 Difference]: With dead ends: 198 [2021-08-21 12:13:17,522 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 12:13:17,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 12:13:17,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 115. [2021-08-21 12:13:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.8771929824561404) internal successors, (328), 114 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 328 transitions. [2021-08-21 12:13:17,525 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 328 transitions. Word has length 15 [2021-08-21 12:13:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:17,525 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 328 transitions. [2021-08-21 12:13:17,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 328 transitions. [2021-08-21 12:13:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:17,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:17,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:17,543 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 12:13:17,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:17,739 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1323848860, now seen corresponding path program 16 times [2021-08-21 12:13:17,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:17,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246198282] [2021-08-21 12:13:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:17,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:17,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:17,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246198282] [2021-08-21 12:13:17,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246198282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:17,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701387538] [2021-08-21 12:13:17,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:17,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:17,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:17,837 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 12:13:17,838 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 12:13:18,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:18,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:18,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701387538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:18,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:18,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:18,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034940742] [2021-08-21 12:13:18,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:18,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:18,348 INFO L87 Difference]: Start difference. First operand 115 states and 328 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:18,647 INFO L93 Difference]: Finished difference Result 240 states and 659 transitions. [2021-08-21 12:13:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:18,648 INFO L225 Difference]: With dead ends: 240 [2021-08-21 12:13:18,648 INFO L226 Difference]: Without dead ends: 235 [2021-08-21 12:13:18,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-21 12:13:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 118. [2021-08-21 12:13:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.8974358974358974) internal successors, (339), 117 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 339 transitions. [2021-08-21 12:13:18,651 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 339 transitions. Word has length 15 [2021-08-21 12:13:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 339 transitions. [2021-08-21 12:13:18,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 339 transitions. [2021-08-21 12:13:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:18,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:18,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:18,670 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 12:13:18,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:18,852 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1904322258, now seen corresponding path program 17 times [2021-08-21 12:13:18,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:18,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946276897] [2021-08-21 12:13:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:18,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:18,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:18,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946276897] [2021-08-21 12:13:18,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946276897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:18,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347615285] [2021-08-21 12:13:18,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:18,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:18,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:18,931 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 12:13:18,932 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 12:13:19,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:19,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:19,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:19,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:19,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347615285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:19,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:19,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:19,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457377232] [2021-08-21 12:13:19,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:19,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:19,445 INFO L87 Difference]: Start difference. First operand 118 states and 339 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:19,815 INFO L93 Difference]: Finished difference Result 211 states and 576 transitions. [2021-08-21 12:13:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:19,816 INFO L225 Difference]: With dead ends: 211 [2021-08-21 12:13:19,816 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 12:13:19,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:13:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 12:13:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 113. [2021-08-21 12:13:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.875) internal successors, (322), 112 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 322 transitions. [2021-08-21 12:13:19,819 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 322 transitions. Word has length 15 [2021-08-21 12:13:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:19,819 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 322 transitions. [2021-08-21 12:13:19,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 322 transitions. [2021-08-21 12:13:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:19,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:19,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:19,836 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 12:13:20,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:13:20,020 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:20,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1830195126, now seen corresponding path program 18 times [2021-08-21 12:13:20,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:20,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113182056] [2021-08-21 12:13:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:20,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:20,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:20,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113182056] [2021-08-21 12:13:20,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113182056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:20,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736247332] [2021-08-21 12:13:20,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:20,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:20,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:20,106 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 12:13:20,140 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 12:13:20,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:20,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:20,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:20,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:20,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736247332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:20,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:20,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:20,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463040712] [2021-08-21 12:13:20,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:20,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:20,667 INFO L87 Difference]: Start difference. First operand 113 states and 322 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:20,944 INFO L93 Difference]: Finished difference Result 188 states and 520 transitions. [2021-08-21 12:13:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:20,945 INFO L225 Difference]: With dead ends: 188 [2021-08-21 12:13:20,946 INFO L226 Difference]: Without dead ends: 183 [2021-08-21 12:13:20,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:13:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-21 12:13:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 119. [2021-08-21 12:13:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.9152542372881354) internal successors, (344), 118 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 344 transitions. [2021-08-21 12:13:20,954 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 344 transitions. Word has length 15 [2021-08-21 12:13:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:20,954 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 344 transitions. [2021-08-21 12:13:20,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 344 transitions. [2021-08-21 12:13:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:20,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:20,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:20,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 12:13:21,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:13:21,171 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1884298772, now seen corresponding path program 19 times [2021-08-21 12:13:21,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:21,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343985816] [2021-08-21 12:13:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:21,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:21,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:21,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343985816] [2021-08-21 12:13:21,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343985816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:21,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084075913] [2021-08-21 12:13:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:21,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:21,242 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 12:13:21,242 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 12:13:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:21,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084075913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:21,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:21,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:21,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060852837] [2021-08-21 12:13:21,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:21,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:21,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:21,809 INFO L87 Difference]: Start difference. First operand 119 states and 344 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:22,191 INFO L93 Difference]: Finished difference Result 205 states and 534 transitions. [2021-08-21 12:13:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:22,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:22,192 INFO L225 Difference]: With dead ends: 205 [2021-08-21 12:13:22,192 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 12:13:22,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:13:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 12:13:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 116. [2021-08-21 12:13:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.8956521739130436) internal successors, (333), 115 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 333 transitions. [2021-08-21 12:13:22,195 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 333 transitions. Word has length 15 [2021-08-21 12:13:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:22,195 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 333 transitions. [2021-08-21 12:13:22,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 333 transitions. [2021-08-21 12:13:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:13:22,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:22,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:22,213 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 12:13:22,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:13:22,413 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1283245638, now seen corresponding path program 20 times [2021-08-21 12:13:22,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:22,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520653704] [2021-08-21 12:13:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:22,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:22,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:22,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520653704] [2021-08-21 12:13:22,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520653704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:22,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607578108] [2021-08-21 12:13:22,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:22,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:22,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:22,477 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 12:13:22,478 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 12:13:22,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:13:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:23,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607578108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:23,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:23,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:23,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026634105] [2021-08-21 12:13:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:23,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:23,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:23,076 INFO L87 Difference]: Start difference. First operand 116 states and 333 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:23,520 INFO L93 Difference]: Finished difference Result 177 states and 476 transitions. [2021-08-21 12:13:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:13:23,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:13:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:23,521 INFO L225 Difference]: With dead ends: 177 [2021-08-21 12:13:23,521 INFO L226 Difference]: Without dead ends: 168 [2021-08-21 12:13:23,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:13:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-21 12:13:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 113. [2021-08-21 12:13:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.875) internal successors, (322), 112 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 322 transitions. [2021-08-21 12:13:23,523 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 322 transitions. Word has length 15 [2021-08-21 12:13:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:23,524 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 322 transitions. [2021-08-21 12:13:23,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 322 transitions. [2021-08-21 12:13:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:23,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:23,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:23,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:23,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:13:23,742 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash -639869072, now seen corresponding path program 1 times [2021-08-21 12:13:23,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:23,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270107886] [2021-08-21 12:13:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:23,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:23,785 INFO 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 12:13:23,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:23,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270107886] [2021-08-21 12:13:23,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270107886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:23,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826642155] [2021-08-21 12:13:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:23,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:23,788 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 12:13:23,788 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 12:13:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:24,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826642155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:24,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:24,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:13:24,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644554801] [2021-08-21 12:13:24,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:24,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:24,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:24,273 INFO L87 Difference]: Start difference. First operand 113 states and 322 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 12:13:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:24,361 INFO L93 Difference]: Finished difference Result 186 states and 521 transitions. [2021-08-21 12:13:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:24,362 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 16 [2021-08-21 12:13:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:24,362 INFO L225 Difference]: With dead ends: 186 [2021-08-21 12:13:24,362 INFO L226 Difference]: Without dead ends: 186 [2021-08-21 12:13:24,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-21 12:13:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 126. [2021-08-21 12:13:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.992) internal successors, (374), 125 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 374 transitions. [2021-08-21 12:13:24,365 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 374 transitions. Word has length 16 [2021-08-21 12:13:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:24,365 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 374 transitions. [2021-08-21 12:13:24,365 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 12:13:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 374 transitions. [2021-08-21 12:13:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:24,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:24,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:24,384 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 12:13:24,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:13:24,581 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1990179173, now seen corresponding path program 1 times [2021-08-21 12:13:24,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:24,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8358049] [2021-08-21 12:13:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:24,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:24,647 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 12:13:24,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:24,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8358049] [2021-08-21 12:13:24,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8358049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:24,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259497233] [2021-08-21 12:13:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:24,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:24,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:24,649 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 12:13:24,680 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 12:13:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:25,190 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 12:13:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259497233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:25,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:25,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290820029] [2021-08-21 12:13:25,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:25,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:25,191 INFO L87 Difference]: Start difference. First operand 126 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:25,336 INFO L93 Difference]: Finished difference Result 163 states and 462 transitions. [2021-08-21 12:13:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:25,337 INFO L225 Difference]: With dead ends: 163 [2021-08-21 12:13:25,337 INFO L226 Difference]: Without dead ends: 153 [2021-08-21 12:13:25,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-21 12:13:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 126. [2021-08-21 12:13:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.952) internal successors, (369), 125 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 369 transitions. [2021-08-21 12:13:25,339 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 369 transitions. Word has length 16 [2021-08-21 12:13:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:25,339 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 369 transitions. [2021-08-21 12:13:25,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:25,340 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 369 transitions. [2021-08-21 12:13:25,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:25,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:25,340 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:25,359 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 12:13:25,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:25,553 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:25,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1652562466, now seen corresponding path program 2 times [2021-08-21 12:13:25,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:25,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432737792] [2021-08-21 12:13:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:25,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:25,601 INFO 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 12:13:25,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:25,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432737792] [2021-08-21 12:13:25,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432737792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:25,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874426084] [2021-08-21 12:13:25,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:25,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:25,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:25,603 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 12:13:25,603 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 12:13:26,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:26,120 INFO 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 12:13:26,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874426084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:26,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:26,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:13:26,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523324824] [2021-08-21 12:13:26,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:26,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:26,121 INFO L87 Difference]: Start difference. First operand 126 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:26,218 INFO L93 Difference]: Finished difference Result 193 states and 538 transitions. [2021-08-21 12:13:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:26,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:26,219 INFO L225 Difference]: With dead ends: 193 [2021-08-21 12:13:26,219 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 12:13:26,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 12:13:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2021-08-21 12:13:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0) internal successors, (384), 128 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 384 transitions. [2021-08-21 12:13:26,222 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 384 transitions. Word has length 16 [2021-08-21 12:13:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:26,222 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 384 transitions. [2021-08-21 12:13:26,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 384 transitions. [2021-08-21 12:13:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:26,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:26,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:26,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:26,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:26,423 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1448292177, now seen corresponding path program 2 times [2021-08-21 12:13:26,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:26,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659556629] [2021-08-21 12:13:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:26,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:26,494 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 12:13:26,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:26,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659556629] [2021-08-21 12:13:26,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659556629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:26,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787610031] [2021-08-21 12:13:26,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:26,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:26,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:26,495 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 12:13:26,496 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 12:13:26,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:27,042 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 12:13:27,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787610031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:27,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:27,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:27,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309140137] [2021-08-21 12:13:27,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:27,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:27,043 INFO L87 Difference]: Start difference. First operand 129 states and 384 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:27,181 INFO L93 Difference]: Finished difference Result 180 states and 505 transitions. [2021-08-21 12:13:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:27,182 INFO L225 Difference]: With dead ends: 180 [2021-08-21 12:13:27,182 INFO L226 Difference]: Without dead ends: 176 [2021-08-21 12:13:27,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-21 12:13:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-08-21 12:13:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9925925925925925) internal successors, (404), 135 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 404 transitions. [2021-08-21 12:13:27,184 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 404 transitions. Word has length 16 [2021-08-21 12:13:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:27,185 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 404 transitions. [2021-08-21 12:13:27,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 404 transitions. [2021-08-21 12:13:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:27,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:27,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:27,202 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 12:13:27,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:27,397 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 20106213, now seen corresponding path program 3 times [2021-08-21 12:13:27,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:27,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311729164] [2021-08-21 12:13:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:27,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:27,472 INFO 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 12:13:27,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:27,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311729164] [2021-08-21 12:13:27,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311729164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:27,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353699693] [2021-08-21 12:13:27,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:27,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:27,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:27,474 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 12:13:27,474 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 12:13:27,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:13:27,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:27,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:28,017 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 12:13:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353699693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:28,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:28,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:28,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857665329] [2021-08-21 12:13:28,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:28,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:28,018 INFO L87 Difference]: Start difference. First operand 136 states and 404 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:28,180 INFO L93 Difference]: Finished difference Result 165 states and 477 transitions. [2021-08-21 12:13:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:28,181 INFO L225 Difference]: With dead ends: 165 [2021-08-21 12:13:28,181 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 12:13:28,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 12:13:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2021-08-21 12:13:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.0) internal successors, (393), 131 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 393 transitions. [2021-08-21 12:13:28,184 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 393 transitions. Word has length 16 [2021-08-21 12:13:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:28,184 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 393 transitions. [2021-08-21 12:13:28,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 393 transitions. [2021-08-21 12:13:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:28,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:28,184 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:28,201 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 12:13:28,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 12:13:28,385 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash 869060340, now seen corresponding path program 3 times [2021-08-21 12:13:28,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:28,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051425180] [2021-08-21 12:13:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:28,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:28,436 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 12:13:28,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:28,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051425180] [2021-08-21 12:13:28,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051425180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:28,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998756105] [2021-08-21 12:13:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:28,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:28,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:28,437 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 12:13:28,440 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 12:13:28,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:13:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:28,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:28,974 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 12:13:28,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998756105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:28,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:28,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:13:28,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141248344] [2021-08-21 12:13:28,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:28,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:28,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:28,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:28,975 INFO L87 Difference]: Start difference. First operand 132 states and 393 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:29,087 INFO L93 Difference]: Finished difference Result 172 states and 488 transitions. [2021-08-21 12:13:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:29,088 INFO L225 Difference]: With dead ends: 172 [2021-08-21 12:13:29,088 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 12:13:29,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 12:13:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 132. [2021-08-21 12:13:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.9770992366412212) internal successors, (390), 131 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 390 transitions. [2021-08-21 12:13:29,090 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 390 transitions. Word has length 16 [2021-08-21 12:13:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:29,090 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 390 transitions. [2021-08-21 12:13:29,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 390 transitions. [2021-08-21 12:13:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:29,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:29,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:29,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 12:13:29,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 12:13:29,291 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -408297336, now seen corresponding path program 4 times [2021-08-21 12:13:29,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:29,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952404718] [2021-08-21 12:13:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:29,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:29,340 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 12:13:29,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:29,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952404718] [2021-08-21 12:13:29,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952404718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:29,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124499767] [2021-08-21 12:13:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:29,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:29,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:29,341 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 12:13:29,342 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 12:13:29,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:29,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:29,925 INFO 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 12:13:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124499767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:29,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:29,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:29,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380419732] [2021-08-21 12:13:29,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:29,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:29,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:29,926 INFO L87 Difference]: Start difference. First operand 132 states and 390 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:30,035 INFO L93 Difference]: Finished difference Result 192 states and 545 transitions. [2021-08-21 12:13:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:30,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:30,036 INFO L225 Difference]: With dead ends: 192 [2021-08-21 12:13:30,037 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 12:13:30,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 12:13:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2021-08-21 12:13:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0437956204379564) internal successors, (417), 137 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 417 transitions. [2021-08-21 12:13:30,039 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 417 transitions. Word has length 16 [2021-08-21 12:13:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:30,039 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 417 transitions. [2021-08-21 12:13:30,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 417 transitions. [2021-08-21 12:13:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:30,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:30,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:30,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 12:13:30,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:13:30,241 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash 785815317, now seen corresponding path program 4 times [2021-08-21 12:13:30,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:30,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086762519] [2021-08-21 12:13:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:30,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:30,306 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 12:13:30,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:30,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086762519] [2021-08-21 12:13:30,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086762519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:30,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434169986] [2021-08-21 12:13:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:30,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:30,307 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 12:13:30,308 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 12:13:30,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:30,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:30,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:30,911 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 12:13:30,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434169986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:30,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:30,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:30,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216776633] [2021-08-21 12:13:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:30,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:30,912 INFO L87 Difference]: Start difference. First operand 138 states and 417 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:31,033 INFO L93 Difference]: Finished difference Result 198 states and 562 transitions. [2021-08-21 12:13:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:31,034 INFO L225 Difference]: With dead ends: 198 [2021-08-21 12:13:31,034 INFO L226 Difference]: Without dead ends: 194 [2021-08-21 12:13:31,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-08-21 12:13:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2021-08-21 12:13:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.054421768707483) internal successors, (449), 147 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 449 transitions. [2021-08-21 12:13:31,037 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 449 transitions. Word has length 16 [2021-08-21 12:13:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:31,037 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 449 transitions. [2021-08-21 12:13:31,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 449 transitions. [2021-08-21 12:13:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:31,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:31,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:31,056 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 12:13:31,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:13:31,252 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2040753589, now seen corresponding path program 5 times [2021-08-21 12:13:31,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:31,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627981531] [2021-08-21 12:13:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:31,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:31,326 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 12:13:31,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:31,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627981531] [2021-08-21 12:13:31,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627981531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:31,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551594754] [2021-08-21 12:13:31,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:31,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:31,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:31,327 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 12:13:31,328 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 12:13:31,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:31,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:31,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:31,906 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 12:13:31,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551594754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:31,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:31,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:31,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903572892] [2021-08-21 12:13:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:31,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:31,908 INFO L87 Difference]: Start difference. First operand 148 states and 449 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:32,047 INFO L93 Difference]: Finished difference Result 200 states and 573 transitions. [2021-08-21 12:13:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:32,049 INFO L225 Difference]: With dead ends: 200 [2021-08-21 12:13:32,049 INFO L226 Difference]: Without dead ends: 200 [2021-08-21 12:13:32,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-21 12:13:32,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2021-08-21 12:13:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.054421768707483) internal successors, (449), 147 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 449 transitions. [2021-08-21 12:13:32,052 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 449 transitions. Word has length 16 [2021-08-21 12:13:32,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:32,052 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 449 transitions. [2021-08-21 12:13:32,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 449 transitions. [2021-08-21 12:13:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:32,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:32,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:32,069 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 12:13:32,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:32,257 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:32,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:32,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1191799462, now seen corresponding path program 5 times [2021-08-21 12:13:32,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:32,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603884920] [2021-08-21 12:13:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:32,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:32,305 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 12:13:32,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:32,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603884920] [2021-08-21 12:13:32,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603884920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:32,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94132079] [2021-08-21 12:13:32,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:32,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:32,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:32,306 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 12:13:32,308 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 12:13:32,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:32,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:32,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:32,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:32,885 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 12:13:32,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94132079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:32,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:32,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:32,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007941196] [2021-08-21 12:13:32,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:32,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:32,886 INFO L87 Difference]: Start difference. First operand 148 states and 449 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:32,967 INFO L93 Difference]: Finished difference Result 201 states and 572 transitions. [2021-08-21 12:13:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:32,968 INFO L225 Difference]: With dead ends: 201 [2021-08-21 12:13:32,969 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 12:13:32,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 12:13:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 145. [2021-08-21 12:13:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0347222222222223) internal successors, (437), 144 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 437 transitions. [2021-08-21 12:13:32,971 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 437 transitions. Word has length 16 [2021-08-21 12:13:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:32,972 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 437 transitions. [2021-08-21 12:13:32,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 437 transitions. [2021-08-21 12:13:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:32,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:32,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:32,989 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 12:13:33,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:13:33,173 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1380473027, now seen corresponding path program 6 times [2021-08-21 12:13:33,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:33,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682253531] [2021-08-21 12:13:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:33,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:33,240 INFO 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 12:13:33,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:33,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682253531] [2021-08-21 12:13:33,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682253531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:33,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172132414] [2021-08-21 12:13:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:33,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:33,245 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 12:13:33,246 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 12:13:33,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:33,863 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 12:13:33,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172132414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:33,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:33,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:33,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271813047] [2021-08-21 12:13:33,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:33,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:33,864 INFO L87 Difference]: Start difference. First operand 145 states and 437 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:34,007 INFO L93 Difference]: Finished difference Result 203 states and 583 transitions. [2021-08-21 12:13:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:34,009 INFO L225 Difference]: With dead ends: 203 [2021-08-21 12:13:34,009 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 12:13:34,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 12:13:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 138. [2021-08-21 12:13:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.021897810218978) internal successors, (414), 137 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 414 transitions. [2021-08-21 12:13:34,012 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 414 transitions. Word has length 16 [2021-08-21 12:13:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:34,012 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 414 transitions. [2021-08-21 12:13:34,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 414 transitions. [2021-08-21 12:13:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:34,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:34,012 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:34,031 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 12:13:34,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:13:34,231 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1210233488, now seen corresponding path program 6 times [2021-08-21 12:13:34,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:34,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783137766] [2021-08-21 12:13:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:34,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:34,263 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 12:13:34,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:34,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783137766] [2021-08-21 12:13:34,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783137766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:34,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515322533] [2021-08-21 12:13:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:34,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:34,265 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 12:13:34,271 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 12:13:34,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:34,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:34,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:34,847 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 12:13:34,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515322533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:34,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:34,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:13:34,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015087298] [2021-08-21 12:13:34,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:34,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:34,848 INFO L87 Difference]: Start difference. First operand 138 states and 414 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:34,938 INFO L93 Difference]: Finished difference Result 171 states and 495 transitions. [2021-08-21 12:13:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:34,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:34,939 INFO L225 Difference]: With dead ends: 171 [2021-08-21 12:13:34,939 INFO L226 Difference]: Without dead ends: 165 [2021-08-21 12:13:34,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-21 12:13:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 138. [2021-08-21 12:13:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0) internal successors, (411), 137 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 411 transitions. [2021-08-21 12:13:34,942 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 411 transitions. Word has length 16 [2021-08-21 12:13:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:34,942 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 411 transitions. [2021-08-21 12:13:34,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 411 transitions. [2021-08-21 12:13:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:34,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:34,943 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:34,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 12:13:35,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-21 12:13:35,160 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash 228834282, now seen corresponding path program 7 times [2021-08-21 12:13:35,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:35,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089441893] [2021-08-21 12:13:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:35,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:35,205 INFO 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 12:13:35,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:35,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089441893] [2021-08-21 12:13:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089441893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:35,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515948808] [2021-08-21 12:13:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:35,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:35,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:35,206 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 12:13:35,208 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 12:13:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:35,810 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 12:13:35,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515948808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:35,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:35,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:13:35,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021037195] [2021-08-21 12:13:35,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:13:35,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:35,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:13:35,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:13:35,811 INFO L87 Difference]: Start difference. First operand 138 states and 411 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 12:13:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:35,908 INFO L93 Difference]: Finished difference Result 314 states and 911 transitions. [2021-08-21 12:13:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:35,908 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 16 [2021-08-21 12:13:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:35,909 INFO L225 Difference]: With dead ends: 314 [2021-08-21 12:13:35,909 INFO L226 Difference]: Without dead ends: 314 [2021-08-21 12:13:35,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:35,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-21 12:13:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 152. [2021-08-21 12:13:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0927152317880795) internal successors, (467), 151 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 467 transitions. [2021-08-21 12:13:35,912 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 467 transitions. Word has length 16 [2021-08-21 12:13:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:35,912 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 467 transitions. [2021-08-21 12:13:35,912 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 12:13:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 467 transitions. [2021-08-21 12:13:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:35,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:35,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:35,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 12:13:36,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:36,122 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1436084769, now seen corresponding path program 7 times [2021-08-21 12:13:36,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:36,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317725865] [2021-08-21 12:13:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:36,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:36,191 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 12:13:36,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:36,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317725865] [2021-08-21 12:13:36,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317725865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:36,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066794990] [2021-08-21 12:13:36,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:36,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:36,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:36,193 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 12:13:36,194 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 12:13:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:36,834 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 12:13:36,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066794990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:36,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:36,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:36,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221201041] [2021-08-21 12:13:36,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:36,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:36,835 INFO L87 Difference]: Start difference. First operand 152 states and 467 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:37,038 INFO L93 Difference]: Finished difference Result 257 states and 727 transitions. [2021-08-21 12:13:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:37,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:37,040 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:13:37,040 INFO L226 Difference]: Without dead ends: 247 [2021-08-21 12:13:37,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-21 12:13:37,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 152. [2021-08-21 12:13:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0596026490066226) internal successors, (462), 151 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 462 transitions. [2021-08-21 12:13:37,054 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 462 transitions. Word has length 16 [2021-08-21 12:13:37,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:37,054 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 462 transitions. [2021-08-21 12:13:37,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 462 transitions. [2021-08-21 12:13:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:37,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:37,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:37,072 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 12:13:37,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:37,273 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1773701476, now seen corresponding path program 8 times [2021-08-21 12:13:37,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:37,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818432549] [2021-08-21 12:13:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:37,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:37,320 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 12:13:37,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:37,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818432549] [2021-08-21 12:13:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818432549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:37,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874930552] [2021-08-21 12:13:37,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:37,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:37,321 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 12:13:37,322 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 12:13:37,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:37,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:37,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:37,953 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 12:13:37,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874930552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:37,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:37,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:13:37,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141428362] [2021-08-21 12:13:37,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:37,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:37,954 INFO L87 Difference]: Start difference. First operand 152 states and 462 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:38,055 INFO L93 Difference]: Finished difference Result 311 states and 888 transitions. [2021-08-21 12:13:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:38,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:38,057 INFO L225 Difference]: With dead ends: 311 [2021-08-21 12:13:38,057 INFO L226 Difference]: Without dead ends: 311 [2021-08-21 12:13:38,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-21 12:13:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 158. [2021-08-21 12:13:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.1337579617834397) internal successors, (492), 157 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 492 transitions. [2021-08-21 12:13:38,067 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 492 transitions. Word has length 16 [2021-08-21 12:13:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:38,067 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 492 transitions. [2021-08-21 12:13:38,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 492 transitions. [2021-08-21 12:13:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:38,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:38,068 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:38,097 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 12:13:38,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:38,281 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash -579588823, now seen corresponding path program 8 times [2021-08-21 12:13:38,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:38,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928527895] [2021-08-21 12:13:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:38,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:38,354 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 12:13:38,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:38,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928527895] [2021-08-21 12:13:38,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928527895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:38,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433741829] [2021-08-21 12:13:38,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:38,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:38,355 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 12:13:38,356 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 12:13:38,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:38,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:38,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:39,046 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 12:13:39,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433741829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:39,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:39,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:39,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174440060] [2021-08-21 12:13:39,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:39,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:39,047 INFO L87 Difference]: Start difference. First operand 158 states and 492 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:39,258 INFO L93 Difference]: Finished difference Result 283 states and 806 transitions. [2021-08-21 12:13:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:39,259 INFO L225 Difference]: With dead ends: 283 [2021-08-21 12:13:39,259 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 12:13:39,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 12:13:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 165. [2021-08-21 12:13:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.1219512195121952) internal successors, (512), 164 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 12:13:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 512 transitions. [2021-08-21 12:13:39,263 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 512 transitions. Word has length 16 [2021-08-21 12:13:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:39,263 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 512 transitions. [2021-08-21 12:13:39,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 512 transitions. [2021-08-21 12:13:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:39,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:39,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:39,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 12:13:39,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:13:39,481 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 888809567, now seen corresponding path program 9 times [2021-08-21 12:13:39,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:39,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920872164] [2021-08-21 12:13:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:39,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:39,574 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 12:13:39,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:39,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920872164] [2021-08-21 12:13:39,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920872164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:39,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676999652] [2021-08-21 12:13:39,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:39,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:39,576 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 12:13:39,577 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 12:13:40,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:13:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:40,270 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 12:13:40,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676999652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:40,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:40,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:40,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782355459] [2021-08-21 12:13:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:40,271 INFO L87 Difference]: Start difference. First operand 165 states and 512 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:40,494 INFO L93 Difference]: Finished difference Result 271 states and 784 transitions. [2021-08-21 12:13:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:40,495 INFO L225 Difference]: With dead ends: 271 [2021-08-21 12:13:40,495 INFO L226 Difference]: Without dead ends: 271 [2021-08-21 12:13:40,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-21 12:13:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 158. [2021-08-21 12:13:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.1146496815286624) internal successors, (489), 157 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 489 transitions. [2021-08-21 12:13:40,499 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 489 transitions. Word has length 16 [2021-08-21 12:13:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:40,499 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 489 transitions. [2021-08-21 12:13:40,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 489 transitions. [2021-08-21 12:13:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:40,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:40,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:40,517 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 12:13:40,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:13:40,709 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1737763694, now seen corresponding path program 9 times [2021-08-21 12:13:40,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:40,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698891133] [2021-08-21 12:13:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:40,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:40,764 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 12:13:40,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:40,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698891133] [2021-08-21 12:13:40,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698891133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:40,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263460398] [2021-08-21 12:13:40,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:40,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:40,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:40,767 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 12:13:40,768 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 12:13:41,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:13:41,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:41,409 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 12:13:41,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263460398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:41,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:41,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:13:41,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194515175] [2021-08-21 12:13:41,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:13:41,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:13:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:13:41,410 INFO L87 Difference]: Start difference. First operand 158 states and 489 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:41,506 INFO L93 Difference]: Finished difference Result 287 states and 823 transitions. [2021-08-21 12:13:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:41,507 INFO L225 Difference]: With dead ends: 287 [2021-08-21 12:13:41,507 INFO L226 Difference]: Without dead ends: 284 [2021-08-21 12:13:41,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-21 12:13:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 153. [2021-08-21 12:13:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0789473684210527) internal successors, (468), 152 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 468 transitions. [2021-08-21 12:13:41,511 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 468 transitions. Word has length 16 [2021-08-21 12:13:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:41,511 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 468 transitions. [2021-08-21 12:13:41,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 468 transitions. [2021-08-21 12:13:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:41,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:41,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:41,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 12:13:41,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 12:13:41,729 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:41,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2035978734, now seen corresponding path program 10 times [2021-08-21 12:13:41,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:41,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128674547] [2021-08-21 12:13:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:41,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:41,802 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 12:13:41,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:41,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128674547] [2021-08-21 12:13:41,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128674547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:41,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463673984] [2021-08-21 12:13:41,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:41,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:41,804 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 12:13:41,804 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 12:13:42,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:42,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:42,478 INFO 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 12:13:42,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463673984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:42,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:42,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:42,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437250657] [2021-08-21 12:13:42,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:42,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:42,479 INFO L87 Difference]: Start difference. First operand 153 states and 468 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:13:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:42,813 INFO L93 Difference]: Finished difference Result 308 states and 874 transitions. [2021-08-21 12:13:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:13:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 16 [2021-08-21 12:13:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:42,814 INFO L225 Difference]: With dead ends: 308 [2021-08-21 12:13:42,814 INFO L226 Difference]: Without dead ends: 298 [2021-08-21 12:13:42,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:13:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-21 12:13:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 143. [2021-08-21 12:13:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.035211267605634) internal successors, (431), 142 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 431 transitions. [2021-08-21 12:13:42,817 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 431 transitions. Word has length 16 [2021-08-21 12:13:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:42,817 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 431 transitions. [2021-08-21 12:13:42,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:13:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 431 transitions. [2021-08-21 12:13:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:42,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:42,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:42,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 12:13:43,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 12:13:43,018 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1349275113, now seen corresponding path program 10 times [2021-08-21 12:13:43,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:43,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521395134] [2021-08-21 12:13:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:43,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:43,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:43,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521395134] [2021-08-21 12:13:43,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521395134] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:43,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:43,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:13:43,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143600389] [2021-08-21 12:13:43,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:13:43,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:13:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:43,063 INFO L87 Difference]: Start difference. First operand 143 states and 431 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:43,154 INFO L93 Difference]: Finished difference Result 204 states and 571 transitions. [2021-08-21 12:13:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:43,155 INFO L225 Difference]: With dead ends: 204 [2021-08-21 12:13:43,155 INFO L226 Difference]: Without dead ends: 194 [2021-08-21 12:13:43,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-08-21 12:13:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 145. [2021-08-21 12:13:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0069444444444446) internal successors, (433), 144 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 433 transitions. [2021-08-21 12:13:43,157 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 433 transitions. Word has length 16 [2021-08-21 12:13:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:43,157 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 433 transitions. [2021-08-21 12:13:43,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 433 transitions. [2021-08-21 12:13:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:43,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:43,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:43,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-21 12:13:43,158 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash -474986455, now seen corresponding path program 11 times [2021-08-21 12:13:43,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:43,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311731166] [2021-08-21 12:13:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:43,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:43,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:43,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311731166] [2021-08-21 12:13:43,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311731166] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:43,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:43,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:13:43,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012006799] [2021-08-21 12:13:43,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:13:43,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:43,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:13:43,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:43,205 INFO L87 Difference]: Start difference. First operand 145 states and 433 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:43,312 INFO L93 Difference]: Finished difference Result 197 states and 551 transitions. [2021-08-21 12:13:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:43,313 INFO L225 Difference]: With dead ends: 197 [2021-08-21 12:13:43,313 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 12:13:43,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 12:13:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2021-08-21 12:13:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.966666666666667) internal successors, (445), 150 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 445 transitions. [2021-08-21 12:13:43,316 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 445 transitions. Word has length 16 [2021-08-21 12:13:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:43,316 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 445 transitions. [2021-08-21 12:13:43,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 445 transitions. [2021-08-21 12:13:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:43,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:43,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:43,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-21 12:13:43,317 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:43,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1260019049, now seen corresponding path program 12 times [2021-08-21 12:13:43,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:43,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317596776] [2021-08-21 12:13:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:43,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:43,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:43,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317596776] [2021-08-21 12:13:43,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317596776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:43,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:43,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:13:43,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019361762] [2021-08-21 12:13:43,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:13:43,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:13:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:43,361 INFO L87 Difference]: Start difference. First operand 151 states and 445 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:43,461 INFO L93 Difference]: Finished difference Result 182 states and 529 transitions. [2021-08-21 12:13:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:43,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:43,462 INFO L225 Difference]: With dead ends: 182 [2021-08-21 12:13:43,463 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 12:13:43,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 12:13:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 143. [2021-08-21 12:13:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.0211267605633805) internal successors, (429), 142 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 429 transitions. [2021-08-21 12:13:43,465 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 429 transitions. Word has length 16 [2021-08-21 12:13:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:43,465 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 429 transitions. [2021-08-21 12:13:43,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 429 transitions. [2021-08-21 12:13:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:43,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:43,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:43,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-21 12:13:43,466 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:43,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:43,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1766864008, now seen corresponding path program 11 times [2021-08-21 12:13:43,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:43,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452312310] [2021-08-21 12:13:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:43,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:43,515 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 12:13:43,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:43,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452312310] [2021-08-21 12:13:43,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452312310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:43,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7574536] [2021-08-21 12:13:43,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:43,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:43,519 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 12:13:43,519 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 12:13:44,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:44,227 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 12:13:44,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7574536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:44,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:44,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:44,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919620393] [2021-08-21 12:13:44,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:44,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:44,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:44,228 INFO L87 Difference]: Start difference. First operand 143 states and 429 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 12:13:44,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:44,322 INFO L93 Difference]: Finished difference Result 259 states and 737 transitions. [2021-08-21 12:13:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:44,322 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 16 [2021-08-21 12:13:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:44,323 INFO L225 Difference]: With dead ends: 259 [2021-08-21 12:13:44,323 INFO L226 Difference]: Without dead ends: 259 [2021-08-21 12:13:44,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-08-21 12:13:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 151. [2021-08-21 12:13:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 3.1266666666666665) internal successors, (469), 150 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 469 transitions. [2021-08-21 12:13:44,326 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 469 transitions. Word has length 16 [2021-08-21 12:13:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:44,326 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 469 transitions. [2021-08-21 12:13:44,326 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 12:13:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 469 transitions. [2021-08-21 12:13:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:44,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:44,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:44,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:13:44,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:44,541 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1333990635, now seen corresponding path program 13 times [2021-08-21 12:13:44,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:44,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762177827] [2021-08-21 12:13:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:44,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:44,593 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 12:13:44,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:44,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762177827] [2021-08-21 12:13:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762177827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:44,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470727102] [2021-08-21 12:13:44,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:44,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:44,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:44,595 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 12:13:44,601 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 12:13:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:45,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:45,313 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 12:13:45,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470727102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:45,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:45,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:45,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562056195] [2021-08-21 12:13:45,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:45,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:45,315 INFO L87 Difference]: Start difference. First operand 151 states and 469 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 12:13:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:45,395 INFO L93 Difference]: Finished difference Result 245 states and 702 transitions. [2021-08-21 12:13:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:45,395 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 16 [2021-08-21 12:13:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:45,396 INFO L225 Difference]: With dead ends: 245 [2021-08-21 12:13:45,396 INFO L226 Difference]: Without dead ends: 241 [2021-08-21 12:13:45,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-21 12:13:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 159. [2021-08-21 12:13:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.1265822784810124) internal successors, (494), 158 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 494 transitions. [2021-08-21 12:13:45,399 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 494 transitions. Word has length 16 [2021-08-21 12:13:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:45,399 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 494 transitions. [2021-08-21 12:13:45,399 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 12:13:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 494 transitions. [2021-08-21 12:13:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:45,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:45,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:45,424 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 12:13:45,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:45,609 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash 134407755, now seen corresponding path program 14 times [2021-08-21 12:13:45,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:45,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207421288] [2021-08-21 12:13:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:45,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:45,675 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 12:13:45,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207421288] [2021-08-21 12:13:45,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207421288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:45,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968153575] [2021-08-21 12:13:45,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:45,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:45,677 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 12:13:45,677 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 12:13:46,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:46,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:46,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:46,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:46,428 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 12:13:46,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968153575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:46,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:46,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:46,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913017033] [2021-08-21 12:13:46,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:46,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:46,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:46,429 INFO L87 Difference]: Start difference. First operand 159 states and 494 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:46,547 INFO L93 Difference]: Finished difference Result 257 states and 743 transitions. [2021-08-21 12:13:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:46,548 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:13:46,548 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 12:13:46,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 12:13:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 159. [2021-08-21 12:13:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.1265822784810124) internal successors, (494), 158 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 494 transitions. [2021-08-21 12:13:46,551 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 494 transitions. Word has length 16 [2021-08-21 12:13:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:46,551 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 494 transitions. [2021-08-21 12:13:46,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 494 transitions. [2021-08-21 12:13:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:46,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:46,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:46,569 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 12:13:46,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:46,762 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash 983361882, now seen corresponding path program 12 times [2021-08-21 12:13:46,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:46,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986594506] [2021-08-21 12:13:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:46,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:46,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:46,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986594506] [2021-08-21 12:13:46,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986594506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:46,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973230549] [2021-08-21 12:13:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:46,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:46,813 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 12:13:46,813 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 12:13:47,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:47,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:47,527 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 12:13:47,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973230549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:47,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:47,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:47,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49475059] [2021-08-21 12:13:47,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:47,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:47,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:47,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:47,529 INFO L87 Difference]: Start difference. First operand 159 states and 494 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:47,624 INFO L93 Difference]: Finished difference Result 256 states and 722 transitions. [2021-08-21 12:13:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:47,626 INFO L225 Difference]: With dead ends: 256 [2021-08-21 12:13:47,626 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 12:13:47,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 12:13:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 159. [2021-08-21 12:13:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.088607594936709) internal successors, (488), 158 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 488 transitions. [2021-08-21 12:13:47,629 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 488 transitions. Word has length 16 [2021-08-21 12:13:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:47,629 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 488 transitions. [2021-08-21 12:13:47,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 488 transitions. [2021-08-21 12:13:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:47,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:47,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:47,648 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 12:13:47,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:47,830 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:47,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2109447520, now seen corresponding path program 13 times [2021-08-21 12:13:47,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:47,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638945125] [2021-08-21 12:13:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:47,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:47,903 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 12:13:47,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:47,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638945125] [2021-08-21 12:13:47,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638945125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:47,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526135390] [2021-08-21 12:13:47,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:47,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:47,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:47,904 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 12:13:47,905 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 12:13:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:48,672 INFO 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 12:13:48,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526135390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:48,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:48,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:48,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917015548] [2021-08-21 12:13:48,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:48,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:48,673 INFO L87 Difference]: Start difference. First operand 159 states and 488 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:13:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:48,940 INFO L93 Difference]: Finished difference Result 266 states and 738 transitions. [2021-08-21 12:13:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:13:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 16 [2021-08-21 12:13:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:48,941 INFO L225 Difference]: With dead ends: 266 [2021-08-21 12:13:48,942 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 12:13:48,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:13:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 12:13:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 152. [2021-08-21 12:13:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0596026490066226) internal successors, (462), 151 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 462 transitions. [2021-08-21 12:13:48,944 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 462 transitions. Word has length 16 [2021-08-21 12:13:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:48,945 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 462 transitions. [2021-08-21 12:13:48,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:13:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 462 transitions. [2021-08-21 12:13:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:48,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:48,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:48,963 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 12:13:49,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 12:13:49,161 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2075424309, now seen corresponding path program 15 times [2021-08-21 12:13:49,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:49,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997946723] [2021-08-21 12:13:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:49,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:49,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:49,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997946723] [2021-08-21 12:13:49,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997946723] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:49,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:49,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:13:49,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14481697] [2021-08-21 12:13:49,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:13:49,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:13:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:49,214 INFO L87 Difference]: Start difference. First operand 152 states and 462 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:49,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:49,317 INFO L93 Difference]: Finished difference Result 229 states and 636 transitions. [2021-08-21 12:13:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:49,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:49,319 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:13:49,319 INFO L226 Difference]: Without dead ends: 225 [2021-08-21 12:13:49,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:49,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-21 12:13:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 154. [2021-08-21 12:13:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.045751633986928) internal successors, (466), 153 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 466 transitions. [2021-08-21 12:13:49,321 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 466 transitions. Word has length 16 [2021-08-21 12:13:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:49,322 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 466 transitions. [2021-08-21 12:13:49,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 466 transitions. [2021-08-21 12:13:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:49,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:49,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:49,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-08-21 12:13:49,322 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:49,322 INFO L82 PathProgramCache]: Analyzing trace with hash -340418805, now seen corresponding path program 16 times [2021-08-21 12:13:49,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:49,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753350598] [2021-08-21 12:13:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:49,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:49,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:49,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753350598] [2021-08-21 12:13:49,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753350598] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:49,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:49,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:13:49,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040551627] [2021-08-21 12:13:49,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:13:49,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:13:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:49,365 INFO L87 Difference]: Start difference. First operand 154 states and 466 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:49,472 INFO L93 Difference]: Finished difference Result 212 states and 610 transitions. [2021-08-21 12:13:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:49,473 INFO L225 Difference]: With dead ends: 212 [2021-08-21 12:13:49,473 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 12:13:49,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 12:13:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2021-08-21 12:13:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0460526315789473) internal successors, (463), 152 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 463 transitions. [2021-08-21 12:13:49,476 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 463 transitions. Word has length 16 [2021-08-21 12:13:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 463 transitions. [2021-08-21 12:13:49,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 463 transitions. [2021-08-21 12:13:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:49,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:49,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:49,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-21 12:13:49,477 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:49,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1519907005, now seen corresponding path program 17 times [2021-08-21 12:13:49,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:49,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121640475] [2021-08-21 12:13:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:49,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:49,557 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 12:13:49,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121640475] [2021-08-21 12:13:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121640475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872545397] [2021-08-21 12:13:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:49,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:49,561 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 12:13:49,600 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 12:13:50,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:13:50,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:50,382 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 12:13:50,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872545397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:50,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:50,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:13:50,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162451713] [2021-08-21 12:13:50,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:50,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:50,383 INFO L87 Difference]: Start difference. First operand 153 states and 463 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:13:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:50,641 INFO L93 Difference]: Finished difference Result 216 states and 621 transitions. [2021-08-21 12:13:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:13:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 16 [2021-08-21 12:13:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:50,642 INFO L225 Difference]: With dead ends: 216 [2021-08-21 12:13:50,642 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 12:13:50,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:13:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 12:13:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 145. [2021-08-21 12:13:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0347222222222223) internal successors, (437), 144 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 437 transitions. [2021-08-21 12:13:50,644 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 437 transitions. Word has length 16 [2021-08-21 12:13:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:50,645 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 437 transitions. [2021-08-21 12:13:50,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:13:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 437 transitions. [2021-08-21 12:13:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:50,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:50,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:50,664 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 12:13:50,863 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,SelfDestructingSolverStorable68 [2021-08-21 12:13:50,864 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:50,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1284843946, now seen corresponding path program 14 times [2021-08-21 12:13:50,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:50,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937858497] [2021-08-21 12:13:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:50,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:50,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:50,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937858497] [2021-08-21 12:13:50,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937858497] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:50,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:50,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:13:50,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959180761] [2021-08-21 12:13:50,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:13:50,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:50,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:13:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:50,903 INFO L87 Difference]: Start difference. First operand 145 states and 437 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:50,984 INFO L93 Difference]: Finished difference Result 214 states and 599 transitions. [2021-08-21 12:13:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:50,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:50,985 INFO L225 Difference]: With dead ends: 214 [2021-08-21 12:13:50,985 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 12:13:50,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 12:13:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 150. [2021-08-21 12:13:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.0) internal successors, (447), 149 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 447 transitions. [2021-08-21 12:13:50,987 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 447 transitions. Word has length 16 [2021-08-21 12:13:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:50,987 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 447 transitions. [2021-08-21 12:13:50,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 447 transitions. [2021-08-21 12:13:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:50,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:50,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:50,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-21 12:13:50,988 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:50,988 INFO L82 PathProgramCache]: Analyzing trace with hash 187516370, now seen corresponding path program 15 times [2021-08-21 12:13:50,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:50,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351543789] [2021-08-21 12:13:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:50,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:51,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:51,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351543789] [2021-08-21 12:13:51,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351543789] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:13:51,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:13:51,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:13:51,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557982343] [2021-08-21 12:13:51,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:13:51,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:51,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:13:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:13:51,030 INFO L87 Difference]: Start difference. First operand 150 states and 447 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:51,103 INFO L93 Difference]: Finished difference Result 201 states and 580 transitions. [2021-08-21 12:13:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:51,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:51,104 INFO L225 Difference]: With dead ends: 201 [2021-08-21 12:13:51,104 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 12:13:51,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 12:13:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 145. [2021-08-21 12:13:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-08-21 12:13:51,106 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 16 [2021-08-21 12:13:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:51,107 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-08-21 12:13:51,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-08-21 12:13:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:51,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:51,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:51,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-21 12:13:51,107 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1975050268, now seen corresponding path program 16 times [2021-08-21 12:13:51,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:51,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683633478] [2021-08-21 12:13:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:51,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:51,163 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 12:13:51,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:51,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683633478] [2021-08-21 12:13:51,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683633478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:51,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145007917] [2021-08-21 12:13:51,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:51,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:51,164 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 12:13:51,164 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 12:13:51,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:51,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:51,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:51,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:51,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145007917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:51,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:51,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:51,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911796701] [2021-08-21 12:13:51,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:51,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:51,963 INFO L87 Difference]: Start difference. First operand 145 states and 436 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 12:13:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:52,074 INFO L93 Difference]: Finished difference Result 260 states and 749 transitions. [2021-08-21 12:13:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:52,074 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 16 [2021-08-21 12:13:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:52,075 INFO L225 Difference]: With dead ends: 260 [2021-08-21 12:13:52,075 INFO L226 Difference]: Without dead ends: 260 [2021-08-21 12:13:52,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-08-21 12:13:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 152. [2021-08-21 12:13:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.0927152317880795) internal successors, (467), 151 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 467 transitions. [2021-08-21 12:13:52,078 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 467 transitions. Word has length 16 [2021-08-21 12:13:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:52,078 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 467 transitions. [2021-08-21 12:13:52,078 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 12:13:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 467 transitions. [2021-08-21 12:13:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:52,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:52,078 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:52,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 12:13:52,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:52,279 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:52,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1125804375, now seen corresponding path program 18 times [2021-08-21 12:13:52,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:52,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616940856] [2021-08-21 12:13:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:52,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:52,357 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 12:13:52,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:52,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616940856] [2021-08-21 12:13:52,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616940856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:52,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806964021] [2021-08-21 12:13:52,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:52,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:52,358 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 12:13:52,358 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 12:13:53,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:53,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:53,153 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 12:13:53,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806964021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:53,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:53,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:53,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551746593] [2021-08-21 12:13:53,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:53,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:53,154 INFO L87 Difference]: Start difference. First operand 152 states and 467 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:53,308 INFO L93 Difference]: Finished difference Result 273 states and 794 transitions. [2021-08-21 12:13:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:53,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:53,309 INFO L225 Difference]: With dead ends: 273 [2021-08-21 12:13:53,309 INFO L226 Difference]: Without dead ends: 269 [2021-08-21 12:13:53,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-21 12:13:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 163. [2021-08-21 12:13:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.1049382716049383) internal successors, (503), 162 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 503 transitions. [2021-08-21 12:13:53,312 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 503 transitions. Word has length 16 [2021-08-21 12:13:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:53,312 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 503 transitions. [2021-08-21 12:13:53,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 503 transitions. [2021-08-21 12:13:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:53,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:53,313 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:53,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 12:13:53,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:53,529 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash 342594015, now seen corresponding path program 19 times [2021-08-21 12:13:53,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:53,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333161677] [2021-08-21 12:13:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:53,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:53,602 INFO 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 12:13:53,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:53,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333161677] [2021-08-21 12:13:53,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333161677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:53,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783450385] [2021-08-21 12:13:53,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:53,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:53,604 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 12:13:53,604 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 12:13:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:54,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:54,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:54,423 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 12:13:54,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783450385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:54,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:54,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:54,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647469070] [2021-08-21 12:13:54,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:54,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:54,424 INFO L87 Difference]: Start difference. First operand 163 states and 503 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:54,613 INFO L93 Difference]: Finished difference Result 281 states and 823 transitions. [2021-08-21 12:13:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:54,622 INFO L225 Difference]: With dead ends: 281 [2021-08-21 12:13:54,622 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 12:13:54,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 12:13:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 163. [2021-08-21 12:13:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 3.1049382716049383) internal successors, (503), 162 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 503 transitions. [2021-08-21 12:13:54,625 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 503 transitions. Word has length 16 [2021-08-21 12:13:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:54,625 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 503 transitions. [2021-08-21 12:13:54,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 503 transitions. [2021-08-21 12:13:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:54,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:54,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:54,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:54,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:54,841 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1191548142, now seen corresponding path program 17 times [2021-08-21 12:13:54,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:54,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480595621] [2021-08-21 12:13:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:54,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:54,888 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 12:13:54,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:54,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480595621] [2021-08-21 12:13:54,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480595621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:54,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144934544] [2021-08-21 12:13:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:54,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:54,889 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 12:13:54,890 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 12:13:55,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:55,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:55,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:55,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:55,699 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 12:13:55,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144934544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:55,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:55,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:55,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788633757] [2021-08-21 12:13:55,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:55,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:55,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:55,700 INFO L87 Difference]: Start difference. First operand 163 states and 503 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:55,801 INFO L93 Difference]: Finished difference Result 263 states and 760 transitions. [2021-08-21 12:13:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:55,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:55,803 INFO L225 Difference]: With dead ends: 263 [2021-08-21 12:13:55,803 INFO L226 Difference]: Without dead ends: 260 [2021-08-21 12:13:55,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-08-21 12:13:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 160. [2021-08-21 12:13:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.088050314465409) internal successors, (491), 159 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 491 transitions. [2021-08-21 12:13:55,806 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 491 transitions. Word has length 16 [2021-08-21 12:13:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:55,806 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 491 transitions. [2021-08-21 12:13:55,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 491 transitions. [2021-08-21 12:13:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:55,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:55,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:55,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:56,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:56,026 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash -531146665, now seen corresponding path program 20 times [2021-08-21 12:13:56,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:56,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503753421] [2021-08-21 12:13:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:56,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:56,098 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 12:13:56,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:56,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503753421] [2021-08-21 12:13:56,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503753421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:56,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263034065] [2021-08-21 12:13:56,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:56,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:56,099 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 12:13:56,100 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 12:13:56,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:56,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:56,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:56,902 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 12:13:56,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263034065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:56,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:56,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 12:13:56,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940515400] [2021-08-21 12:13:56,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:56,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:56,903 INFO L87 Difference]: Start difference. First operand 160 states and 491 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:57,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:57,055 INFO L93 Difference]: Finished difference Result 294 states and 865 transitions. [2021-08-21 12:13:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:13:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:57,056 INFO L225 Difference]: With dead ends: 294 [2021-08-21 12:13:57,056 INFO L226 Difference]: Without dead ends: 294 [2021-08-21 12:13:57,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:13:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-21 12:13:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 160. [2021-08-21 12:13:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.088050314465409) internal successors, (491), 159 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 491 transitions. [2021-08-21 12:13:57,059 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 491 transitions. Word has length 16 [2021-08-21 12:13:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:57,059 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 491 transitions. [2021-08-21 12:13:57,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 491 transitions. [2021-08-21 12:13:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:57,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:57,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:57,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 12:13:57,260 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,SelfDestructingSolverStorable75 [2021-08-21 12:13:57,260 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1173114116, now seen corresponding path program 18 times [2021-08-21 12:13:57,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:57,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960033042] [2021-08-21 12:13:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:57,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:57,312 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 12:13:57,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:57,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960033042] [2021-08-21 12:13:57,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960033042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:57,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117660131] [2021-08-21 12:13:57,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:57,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:57,313 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 12:13:57,314 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 12:13:58,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:13:58,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:58,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:58,115 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 12:13:58,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117660131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:58,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:58,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:58,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564448027] [2021-08-21 12:13:58,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:58,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:58,116 INFO L87 Difference]: Start difference. First operand 160 states and 491 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:13:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:58,197 INFO L93 Difference]: Finished difference Result 253 states and 725 transitions. [2021-08-21 12:13:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:58,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 16 [2021-08-21 12:13:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:58,198 INFO L225 Difference]: With dead ends: 253 [2021-08-21 12:13:58,198 INFO L226 Difference]: Without dead ends: 247 [2021-08-21 12:13:58,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-21 12:13:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 157. [2021-08-21 12:13:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 3.0705128205128207) internal successors, (479), 156 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 479 transitions. [2021-08-21 12:13:58,201 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 479 transitions. Word has length 16 [2021-08-21 12:13:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:58,201 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 479 transitions. [2021-08-21 12:13:58,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 12:13:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 479 transitions. [2021-08-21 12:13:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:58,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:58,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:58,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:58,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:58,409 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1044968350, now seen corresponding path program 19 times [2021-08-21 12:13:58,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:58,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650847358] [2021-08-21 12:13:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:58,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:58,468 INFO 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 12:13:58,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:58,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650847358] [2021-08-21 12:13:58,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650847358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:58,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031469419] [2021-08-21 12:13:58,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:58,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:58,489 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 12:13:58,490 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 12:13:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:59,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:13:59,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031469419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:59,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:59,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:59,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889814887] [2021-08-21 12:13:59,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:59,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:59,387 INFO L87 Difference]: Start difference. First operand 157 states and 479 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 12:13:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:59,489 INFO L93 Difference]: Finished difference Result 282 states and 801 transitions. [2021-08-21 12:13:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:13:59,489 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 16 [2021-08-21 12:13:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:59,490 INFO L225 Difference]: With dead ends: 282 [2021-08-21 12:13:59,490 INFO L226 Difference]: Without dead ends: 282 [2021-08-21 12:13:59,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-08-21 12:13:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 165. [2021-08-21 12:13:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.1646341463414633) internal successors, (519), 164 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 519 transitions. [2021-08-21 12:13:59,493 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 519 transitions. Word has length 16 [2021-08-21 12:13:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:59,493 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 519 transitions. [2021-08-21 12:13:59,493 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 12:13:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 519 transitions. [2021-08-21 12:13:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:13:59,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:59,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:59,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:59,694 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,SelfDestructingSolverStorable77 [2021-08-21 12:13:59,694 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:13:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash 149144303, now seen corresponding path program 21 times [2021-08-21 12:13:59,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:59,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846398569] [2021-08-21 12:13:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:59,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:59,745 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 12:13:59,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:59,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846398569] [2021-08-21 12:13:59,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846398569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:59,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662197115] [2021-08-21 12:13:59,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:59,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:59,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:59,746 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 12:13:59,746 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 12:14:00,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:00,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:00,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662197115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:00,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:00,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:00,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416065816] [2021-08-21 12:14:00,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:00,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:00,610 INFO L87 Difference]: Start difference. First operand 165 states and 519 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:00,689 INFO L93 Difference]: Finished difference Result 288 states and 815 transitions. [2021-08-21 12:14:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:00,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 16 [2021-08-21 12:14:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:00,690 INFO L225 Difference]: With dead ends: 288 [2021-08-21 12:14:00,690 INFO L226 Difference]: Without dead ends: 284 [2021-08-21 12:14:00,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-21 12:14:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 169. [2021-08-21 12:14:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.1904761904761907) internal successors, (536), 168 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 536 transitions. [2021-08-21 12:14:00,694 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 536 transitions. Word has length 16 [2021-08-21 12:14:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:00,694 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 536 transitions. [2021-08-21 12:14:00,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 536 transitions. [2021-08-21 12:14:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:00,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:00,694 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:00,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:00,894 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,SelfDestructingSolverStorable78 [2021-08-21 12:14:00,895 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1617542693, now seen corresponding path program 22 times [2021-08-21 12:14:00,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:00,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196315222] [2021-08-21 12:14:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:00,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:00,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:00,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196315222] [2021-08-21 12:14:00,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196315222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:00,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093536051] [2021-08-21 12:14:00,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:00,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:00,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:00,946 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 12:14:00,946 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 12:14:01,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:01,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:01,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093536051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:01,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:01,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:01,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988440546] [2021-08-21 12:14:01,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:01,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:01,801 INFO L87 Difference]: Start difference. First operand 169 states and 536 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:01,897 INFO L93 Difference]: Finished difference Result 292 states and 840 transitions. [2021-08-21 12:14:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:01,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:01,898 INFO L225 Difference]: With dead ends: 292 [2021-08-21 12:14:01,898 INFO L226 Difference]: Without dead ends: 292 [2021-08-21 12:14:01,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-21 12:14:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2021-08-21 12:14:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.1575757575757577) internal successors, (521), 165 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 521 transitions. [2021-08-21 12:14:01,901 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 521 transitions. Word has length 16 [2021-08-21 12:14:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:01,901 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 521 transitions. [2021-08-21 12:14:01,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 521 transitions. [2021-08-21 12:14:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:01,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:01,901 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:01,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-21 12:14:02,109 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1828470476, now seen corresponding path program 20 times [2021-08-21 12:14:02,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:02,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081399014] [2021-08-21 12:14:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:02,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:02,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081399014] [2021-08-21 12:14:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081399014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:02,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623249418] [2021-08-21 12:14:02,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:02,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:02,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:02,166 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 12:14:02,168 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 12:14:02,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:02,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:02,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:03,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623249418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:03,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:03,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:03,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285746426] [2021-08-21 12:14:03,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:03,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:03,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:03,044 INFO L87 Difference]: Start difference. First operand 166 states and 521 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:03,128 INFO L93 Difference]: Finished difference Result 272 states and 763 transitions. [2021-08-21 12:14:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:03,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:03,129 INFO L225 Difference]: With dead ends: 272 [2021-08-21 12:14:03,129 INFO L226 Difference]: Without dead ends: 269 [2021-08-21 12:14:03,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-21 12:14:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2021-08-21 12:14:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.121212121212121) internal successors, (515), 165 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 515 transitions. [2021-08-21 12:14:03,132 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 515 transitions. Word has length 16 [2021-08-21 12:14:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:03,132 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 515 transitions. [2021-08-21 12:14:03,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 515 transitions. [2021-08-21 12:14:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:03,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:03,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:03,151 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 12:14:03,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:03,337 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -702384838, now seen corresponding path program 21 times [2021-08-21 12:14:03,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:03,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498649242] [2021-08-21 12:14:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:03,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:03,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498649242] [2021-08-21 12:14:03,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498649242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539694426] [2021-08-21 12:14:03,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:03,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:03,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:03,413 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 12:14:03,414 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 12:14:04,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:14:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:04,344 INFO 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 12:14:04,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539694426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:04,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:04,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:14:04,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82637510] [2021-08-21 12:14:04,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:04,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:04,345 INFO L87 Difference]: Start difference. First operand 166 states and 515 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:14:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:04,626 INFO L93 Difference]: Finished difference Result 264 states and 739 transitions. [2021-08-21 12:14:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 16 [2021-08-21 12:14:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:04,626 INFO L225 Difference]: With dead ends: 264 [2021-08-21 12:14:04,627 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 12:14:04,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:14:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 12:14:04,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 159. [2021-08-21 12:14:04,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0949367088607596) internal successors, (489), 158 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:04,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 489 transitions. [2021-08-21 12:14:04,629 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 489 transitions. Word has length 16 [2021-08-21 12:14:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:04,629 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 489 transitions. [2021-08-21 12:14:04,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:14:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 489 transitions. [2021-08-21 12:14:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:04,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:04,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:04,648 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 12:14:04,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:04,830 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:04,831 INFO L82 PathProgramCache]: Analyzing trace with hash -592289371, now seen corresponding path program 23 times [2021-08-21 12:14:04,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:04,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087800029] [2021-08-21 12:14:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:04,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:04,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:04,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087800029] [2021-08-21 12:14:04,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087800029] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:04,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:04,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:04,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517466961] [2021-08-21 12:14:04,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:04,874 INFO L87 Difference]: Start difference. First operand 159 states and 489 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:04,945 INFO L93 Difference]: Finished difference Result 244 states and 679 transitions. [2021-08-21 12:14:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:04,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:04,946 INFO L225 Difference]: With dead ends: 244 [2021-08-21 12:14:04,946 INFO L226 Difference]: Without dead ends: 240 [2021-08-21 12:14:04,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-21 12:14:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 161. [2021-08-21 12:14:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.08125) internal successors, (493), 160 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 493 transitions. [2021-08-21 12:14:04,949 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 493 transitions. Word has length 16 [2021-08-21 12:14:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 493 transitions. [2021-08-21 12:14:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 493 transitions. [2021-08-21 12:14:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:04,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:04,950 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:04,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-21 12:14:04,950 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1142716133, now seen corresponding path program 24 times [2021-08-21 12:14:04,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:04,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941551139] [2021-08-21 12:14:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:04,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:04,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:04,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941551139] [2021-08-21 12:14:04,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941551139] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:04,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:04,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:04,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864050208] [2021-08-21 12:14:04,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:04,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:04,995 INFO L87 Difference]: Start difference. First operand 161 states and 493 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:05,067 INFO L93 Difference]: Finished difference Result 227 states and 653 transitions. [2021-08-21 12:14:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:05,068 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:14:05,068 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:14:05,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:14:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 160. [2021-08-21 12:14:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0817610062893084) internal successors, (490), 159 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 490 transitions. [2021-08-21 12:14:05,070 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 490 transitions. Word has length 16 [2021-08-21 12:14:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:05,070 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 490 transitions. [2021-08-21 12:14:05,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 490 transitions. [2021-08-21 12:14:05,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:05,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:05,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:05,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-21 12:14:05,071 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1291925353, now seen corresponding path program 25 times [2021-08-21 12:14:05,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:05,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829406317] [2021-08-21 12:14:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:05,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:05,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:05,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829406317] [2021-08-21 12:14:05,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829406317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:05,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426572338] [2021-08-21 12:14:05,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:05,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:05,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:05,141 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 12:14:05,141 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 12:14:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:06,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426572338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:06,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:06,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:14:06,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592821811] [2021-08-21 12:14:06,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:06,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:06,067 INFO L87 Difference]: Start difference. First operand 160 states and 490 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:14:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:06,320 INFO L93 Difference]: Finished difference Result 255 states and 726 transitions. [2021-08-21 12:14:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 16 [2021-08-21 12:14:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:06,321 INFO L225 Difference]: With dead ends: 255 [2021-08-21 12:14:06,321 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 12:14:06,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:14:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 12:14:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-08-21 12:14:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0817610062893084) internal successors, (490), 159 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 490 transitions. [2021-08-21 12:14:06,324 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 490 transitions. Word has length 16 [2021-08-21 12:14:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 490 transitions. [2021-08-21 12:14:06,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:14:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 490 transitions. [2021-08-21 12:14:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:06,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:06,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:06,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 12:14:06,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:06,525 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1526988412, now seen corresponding path program 22 times [2021-08-21 12:14:06,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:06,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836669192] [2021-08-21 12:14:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:06,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:06,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:06,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836669192] [2021-08-21 12:14:06,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836669192] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:06,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:06,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:06,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555477893] [2021-08-21 12:14:06,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:06,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:06,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:06,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:06,577 INFO L87 Difference]: Start difference. First operand 160 states and 490 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:06,679 INFO L93 Difference]: Finished difference Result 242 states and 676 transitions. [2021-08-21 12:14:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:06,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:06,680 INFO L225 Difference]: With dead ends: 242 [2021-08-21 12:14:06,680 INFO L226 Difference]: Without dead ends: 239 [2021-08-21 12:14:06,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-21 12:14:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2021-08-21 12:14:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 3.048780487804878) internal successors, (500), 164 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 500 transitions. [2021-08-21 12:14:06,683 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 500 transitions. Word has length 16 [2021-08-21 12:14:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:06,683 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 500 transitions. [2021-08-21 12:14:06,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 500 transitions. [2021-08-21 12:14:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:06,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:06,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:06,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-21 12:14:06,684 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:06,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1670651308, now seen corresponding path program 23 times [2021-08-21 12:14:06,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:06,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480975853] [2021-08-21 12:14:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:06,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:06,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:06,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480975853] [2021-08-21 12:14:06,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480975853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:06,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:06,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:06,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924306786] [2021-08-21 12:14:06,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:06,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:06,733 INFO L87 Difference]: Start difference. First operand 165 states and 500 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:06,829 INFO L93 Difference]: Finished difference Result 229 states and 657 transitions. [2021-08-21 12:14:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:06,830 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:14:06,830 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 12:14:06,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 12:14:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 159. [2021-08-21 12:14:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0759493670886076) internal successors, (486), 158 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 486 transitions. [2021-08-21 12:14:06,833 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 486 transitions. Word has length 16 [2021-08-21 12:14:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:06,833 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 486 transitions. [2021-08-21 12:14:06,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 486 transitions. [2021-08-21 12:14:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:06,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:06,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:06,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-08-21 12:14:06,834 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash -530342875, now seen corresponding path program 26 times [2021-08-21 12:14:06,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:06,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261094919] [2021-08-21 12:14:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:06,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:06,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:06,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261094919] [2021-08-21 12:14:06,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261094919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:06,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928495005] [2021-08-21 12:14:06,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:06,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:06,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:06,900 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 12:14:06,900 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 12:14:07,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:07,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:07,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:07,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:07,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928495005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:07,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:07,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 12:14:07,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205576748] [2021-08-21 12:14:07,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:07,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:07,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:07,804 INFO L87 Difference]: Start difference. First operand 159 states and 486 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:14:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:08,126 INFO L93 Difference]: Finished difference Result 292 states and 838 transitions. [2021-08-21 12:14:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:14:08,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 16 [2021-08-21 12:14:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:08,128 INFO L225 Difference]: With dead ends: 292 [2021-08-21 12:14:08,128 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 12:14:08,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:14:08,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 12:14:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 147. [2021-08-21 12:14:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.041095890410959) internal successors, (444), 146 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 444 transitions. [2021-08-21 12:14:08,130 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 444 transitions. Word has length 16 [2021-08-21 12:14:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:08,131 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 444 transitions. [2021-08-21 12:14:08,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 12:14:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 444 transitions. [2021-08-21 12:14:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:08,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:08,131 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:08,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 12:14:08,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:08,332 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1929123508, now seen corresponding path program 24 times [2021-08-21 12:14:08,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:08,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356511532] [2021-08-21 12:14:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:08,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:08,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:08,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356511532] [2021-08-21 12:14:08,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356511532] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:08,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:08,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:08,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876436053] [2021-08-21 12:14:08,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:08,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:08,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:08,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:08,383 INFO L87 Difference]: Start difference. First operand 147 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:08,483 INFO L93 Difference]: Finished difference Result 201 states and 570 transitions. [2021-08-21 12:14:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:08,483 INFO L225 Difference]: With dead ends: 201 [2021-08-21 12:14:08,483 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:14:08,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:14:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 148. [2021-08-21 12:14:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.0272108843537415) internal successors, (445), 147 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 445 transitions. [2021-08-21 12:14:08,486 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 445 transitions. Word has length 16 [2021-08-21 12:14:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:08,486 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 445 transitions. [2021-08-21 12:14:08,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 445 transitions. [2021-08-21 12:14:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:08,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:08,486 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:08,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-21 12:14:08,487 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash -939243090, now seen corresponding path program 25 times [2021-08-21 12:14:08,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:08,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846361354] [2021-08-21 12:14:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:08,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:08,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:08,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846361354] [2021-08-21 12:14:08,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846361354] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:08,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:08,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:08,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354158707] [2021-08-21 12:14:08,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:08,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:08,530 INFO L87 Difference]: Start difference. First operand 148 states and 445 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:08,640 INFO L93 Difference]: Finished difference Result 198 states and 560 transitions. [2021-08-21 12:14:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:08,641 INFO L225 Difference]: With dead ends: 198 [2021-08-21 12:14:08,641 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:14:08,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:14:08,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2021-08-21 12:14:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.9934210526315788) internal successors, (455), 152 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 455 transitions. [2021-08-21 12:14:08,644 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 455 transitions. Word has length 16 [2021-08-21 12:14:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:08,644 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 455 transitions. [2021-08-21 12:14:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 455 transitions. [2021-08-21 12:14:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:08,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:08,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:08,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-21 12:14:08,644 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2036570666, now seen corresponding path program 26 times [2021-08-21 12:14:08,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:08,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253285462] [2021-08-21 12:14:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:08,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:08,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:08,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253285462] [2021-08-21 12:14:08,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253285462] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:08,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:08,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:08,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837138368] [2021-08-21 12:14:08,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:08,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:08,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:08,692 INFO L87 Difference]: Start difference. First operand 153 states and 455 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:08,799 INFO L93 Difference]: Finished difference Result 185 states and 541 transitions. [2021-08-21 12:14:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:08,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:08,799 INFO L225 Difference]: With dead ends: 185 [2021-08-21 12:14:08,799 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 12:14:08,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 12:14:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 147. [2021-08-21 12:14:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0342465753424657) internal successors, (443), 146 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 443 transitions. [2021-08-21 12:14:08,802 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 443 transitions. Word has length 16 [2021-08-21 12:14:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:08,802 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 443 transitions. [2021-08-21 12:14:08,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 443 transitions. [2021-08-21 12:14:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:08,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:08,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:08,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-21 12:14:08,802 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1038622896, now seen corresponding path program 27 times [2021-08-21 12:14:08,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:08,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124667210] [2021-08-21 12:14:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:08,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:08,867 INFO 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 12:14:08,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:08,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124667210] [2021-08-21 12:14:08,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124667210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:08,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615414111] [2021-08-21 12:14:08,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:08,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:08,868 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 12:14:08,869 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 12:14:09,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:09,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:09,791 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 12:14:09,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615414111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:09,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:09,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:09,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330214932] [2021-08-21 12:14:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:09,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:09,793 INFO L87 Difference]: Start difference. First operand 147 states and 443 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:09,933 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-08-21 12:14:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:09,934 INFO L225 Difference]: With dead ends: 224 [2021-08-21 12:14:09,934 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:14:09,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:14:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 147. [2021-08-21 12:14:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0342465753424657) internal successors, (443), 146 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 443 transitions. [2021-08-21 12:14:09,936 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 443 transitions. Word has length 16 [2021-08-21 12:14:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:09,936 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 443 transitions. [2021-08-21 12:14:09,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 443 transitions. [2021-08-21 12:14:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:09,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:09,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:09,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:10,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:10,137 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:10,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1591425349, now seen corresponding path program 27 times [2021-08-21 12:14:10,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:10,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903377585] [2021-08-21 12:14:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:10,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:10,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:10,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903377585] [2021-08-21 12:14:10,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903377585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:10,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117299706] [2021-08-21 12:14:10,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:10,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:10,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:10,217 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 12:14:10,218 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 12:14:11,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:11,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:11,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117299706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:11,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:11,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:11,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415203030] [2021-08-21 12:14:11,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:11,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:11,144 INFO L87 Difference]: Start difference. First operand 147 states and 443 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:11,257 INFO L93 Difference]: Finished difference Result 244 states and 672 transitions. [2021-08-21 12:14:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:11,258 INFO L225 Difference]: With dead ends: 244 [2021-08-21 12:14:11,258 INFO L226 Difference]: Without dead ends: 234 [2021-08-21 12:14:11,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-21 12:14:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 147. [2021-08-21 12:14:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.0) internal successors, (438), 146 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 438 transitions. [2021-08-21 12:14:11,261 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 438 transitions. Word has length 16 [2021-08-21 12:14:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:11,261 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 438 transitions. [2021-08-21 12:14:11,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 438 transitions. [2021-08-21 12:14:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:11,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:11,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:11,281 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 12:14:11,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:11,470 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1253808642, now seen corresponding path program 28 times [2021-08-21 12:14:11,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:11,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224352232] [2021-08-21 12:14:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:11,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:11,551 INFO 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 12:14:11,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:11,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224352232] [2021-08-21 12:14:11,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224352232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:11,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834736057] [2021-08-21 12:14:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:11,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:11,553 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 12:14:11,554 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 12:14:12,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:12,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:12,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834736057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:12,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:12,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:12,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977470264] [2021-08-21 12:14:12,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:12,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:12,502 INFO L87 Difference]: Start difference. First operand 147 states and 438 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:12,642 INFO L93 Difference]: Finished difference Result 248 states and 707 transitions. [2021-08-21 12:14:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:12,643 INFO L225 Difference]: With dead ends: 248 [2021-08-21 12:14:12,643 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:14:12,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:14:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 153. [2021-08-21 12:14:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0789473684210527) internal successors, (468), 152 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 468 transitions. [2021-08-21 12:14:12,646 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 468 transitions. Word has length 16 [2021-08-21 12:14:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:12,646 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 468 transitions. [2021-08-21 12:14:12,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 468 transitions. [2021-08-21 12:14:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:12,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:12,646 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:12,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 12:14:12,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:12,847 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:12,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:12,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1847046001, now seen corresponding path program 28 times [2021-08-21 12:14:12,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:12,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822534960] [2021-08-21 12:14:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:12,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:12,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:12,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822534960] [2021-08-21 12:14:12,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822534960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:12,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279632819] [2021-08-21 12:14:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:12,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:12,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:12,921 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 12:14:12,954 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 12:14:13,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:13,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:13,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:13,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279632819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:13,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:13,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:13,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889592522] [2021-08-21 12:14:13,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:13,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:13,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:13,913 INFO L87 Difference]: Start difference. First operand 153 states and 468 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:14,051 INFO L93 Difference]: Finished difference Result 264 states and 730 transitions. [2021-08-21 12:14:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:14,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:14,052 INFO L225 Difference]: With dead ends: 264 [2021-08-21 12:14:14,052 INFO L226 Difference]: Without dead ends: 260 [2021-08-21 12:14:14,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-08-21 12:14:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 160. [2021-08-21 12:14:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-08-21 12:14:14,055 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-08-21 12:14:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:14,055 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-08-21 12:14:14,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-08-21 12:14:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:14,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:14,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:14,074 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 12:14:14,256 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,SelfDestructingSolverStorable94 [2021-08-21 12:14:14,256 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash -378647611, now seen corresponding path program 29 times [2021-08-21 12:14:14,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:14,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631242828] [2021-08-21 12:14:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:14,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:14,333 INFO 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 12:14:14,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:14,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631242828] [2021-08-21 12:14:14,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631242828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:14,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045865483] [2021-08-21 12:14:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:14,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:14,334 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 12:14:14,335 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 12:14:15,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:15,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:15,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:15,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045865483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:15,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:15,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:15,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130275034] [2021-08-21 12:14:15,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:15,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:15,323 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:15,473 INFO L93 Difference]: Finished difference Result 249 states and 702 transitions. [2021-08-21 12:14:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:15,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:15,474 INFO L225 Difference]: With dead ends: 249 [2021-08-21 12:14:15,474 INFO L226 Difference]: Without dead ends: 249 [2021-08-21 12:14:15,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-21 12:14:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 153. [2021-08-21 12:14:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.0592105263157894) internal successors, (465), 152 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 465 transitions. [2021-08-21 12:14:15,478 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 465 transitions. Word has length 16 [2021-08-21 12:14:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:15,478 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 465 transitions. [2021-08-21 12:14:15,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 465 transitions. [2021-08-21 12:14:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:15,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:15,478 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:15,497 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 12:14:15,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:15,681 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:15,681 INFO L82 PathProgramCache]: Analyzing trace with hash 470306516, now seen corresponding path program 29 times [2021-08-21 12:14:15,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:15,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865482805] [2021-08-21 12:14:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:15,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:15,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:15,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865482805] [2021-08-21 12:14:15,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865482805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:15,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633488321] [2021-08-21 12:14:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:15,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:15,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:15,745 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 12:14:15,746 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 12:14:16,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:16,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:16,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:16,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633488321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:16,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:16,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:16,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489451546] [2021-08-21 12:14:16,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:16,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:16,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:16,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:16,724 INFO L87 Difference]: Start difference. First operand 153 states and 465 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:16,845 INFO L93 Difference]: Finished difference Result 227 states and 654 transitions. [2021-08-21 12:14:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:16,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:16,845 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:14:16,846 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:14:16,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:14:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2021-08-21 12:14:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.020408163265306) internal successors, (444), 147 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 444 transitions. [2021-08-21 12:14:16,848 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 444 transitions. Word has length 16 [2021-08-21 12:14:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:16,848 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 444 transitions. [2021-08-21 12:14:16,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 444 transitions. [2021-08-21 12:14:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:16,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:16,849 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:16,878 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 12:14:17,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:17,061 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash 991531384, now seen corresponding path program 30 times [2021-08-21 12:14:17,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:17,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203713235] [2021-08-21 12:14:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:17,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:17,108 INFO 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 12:14:17,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:17,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203713235] [2021-08-21 12:14:17,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203713235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:17,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191334249] [2021-08-21 12:14:17,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:17,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:17,113 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 12:14:17,120 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 12:14:17,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:14:17,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:18,073 INFO 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 12:14:18,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191334249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:18,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:18,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:14:18,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222442437] [2021-08-21 12:14:18,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:18,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:18,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:18,074 INFO L87 Difference]: Start difference. First operand 148 states and 444 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:18,159 INFO L93 Difference]: Finished difference Result 304 states and 875 transitions. [2021-08-21 12:14:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:18,159 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 16 [2021-08-21 12:14:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:18,160 INFO L225 Difference]: With dead ends: 304 [2021-08-21 12:14:18,160 INFO L226 Difference]: Without dead ends: 304 [2021-08-21 12:14:18,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-21 12:14:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 152. [2021-08-21 12:14:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.019867549668874) internal successors, (456), 151 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 456 transitions. [2021-08-21 12:14:18,163 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 456 transitions. Word has length 16 [2021-08-21 12:14:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:18,163 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 456 transitions. [2021-08-21 12:14:18,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 456 transitions. [2021-08-21 12:14:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:18,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:18,163 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:18,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 12:14:18,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:18,364 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash -501486098, now seen corresponding path program 31 times [2021-08-21 12:14:18,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:18,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761944068] [2021-08-21 12:14:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:18,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:18,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:18,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761944068] [2021-08-21 12:14:18,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761944068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:18,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321255231] [2021-08-21 12:14:18,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:18,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:18,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:18,414 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 12:14:18,437 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 12:14:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:19,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:19,421 INFO 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 12:14:19,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321255231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:19,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:19,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008811275] [2021-08-21 12:14:19,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:19,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:19,422 INFO L87 Difference]: Start difference. First operand 152 states and 456 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:19,516 INFO L93 Difference]: Finished difference Result 279 states and 796 transitions. [2021-08-21 12:14:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:19,517 INFO L225 Difference]: With dead ends: 279 [2021-08-21 12:14:19,517 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 12:14:19,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 12:14:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 154. [2021-08-21 12:14:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.0326797385620914) internal successors, (464), 153 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 464 transitions. [2021-08-21 12:14:19,520 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 464 transitions. Word has length 16 [2021-08-21 12:14:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:19,520 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 464 transitions. [2021-08-21 12:14:19,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 464 transitions. [2021-08-21 12:14:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:19,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:19,521 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:19,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 12:14:19,721 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,SelfDestructingSolverStorable98 [2021-08-21 12:14:19,721 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1851451694, now seen corresponding path program 32 times [2021-08-21 12:14:19,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:19,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667921976] [2021-08-21 12:14:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:19,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:19,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:19,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667921976] [2021-08-21 12:14:19,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667921976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:19,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613015955] [2021-08-21 12:14:19,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:19,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:19,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:19,775 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 12:14:19,776 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 12:14:20,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:20,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613015955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:20,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805836785] [2021-08-21 12:14:20,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:20,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:20,775 INFO L87 Difference]: Start difference. First operand 154 states and 464 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:20,872 INFO L93 Difference]: Finished difference Result 255 states and 738 transitions. [2021-08-21 12:14:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:20,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:20,873 INFO L225 Difference]: With dead ends: 255 [2021-08-21 12:14:20,873 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 12:14:20,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 12:14:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 148. [2021-08-21 12:14:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.020408163265306) internal successors, (444), 147 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 444 transitions. [2021-08-21 12:14:20,875 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 444 transitions. Word has length 16 [2021-08-21 12:14:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:20,875 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 444 transitions. [2021-08-21 12:14:20,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 444 transitions. [2021-08-21 12:14:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:20,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:20,876 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:20,895 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 12:14:21,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 12:14:21,079 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:21,080 INFO L82 PathProgramCache]: Analyzing trace with hash 81817935, now seen corresponding path program 30 times [2021-08-21 12:14:21,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:21,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853302771] [2021-08-21 12:14:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:21,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:21,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:21,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853302771] [2021-08-21 12:14:21,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853302771] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:21,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:21,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:21,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73340533] [2021-08-21 12:14:21,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:21,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:21,122 INFO L87 Difference]: Start difference. First operand 148 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:21,201 INFO L93 Difference]: Finished difference Result 276 states and 746 transitions. [2021-08-21 12:14:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:21,202 INFO L225 Difference]: With dead ends: 276 [2021-08-21 12:14:21,202 INFO L226 Difference]: Without dead ends: 266 [2021-08-21 12:14:21,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-08-21 12:14:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-08-21 12:14:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.9932885906040267) internal successors, (446), 149 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 446 transitions. [2021-08-21 12:14:21,205 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 446 transitions. Word has length 16 [2021-08-21 12:14:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:21,205 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 446 transitions. [2021-08-21 12:14:21,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 446 transitions. [2021-08-21 12:14:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:21,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:21,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:21,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-21 12:14:21,206 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1742443633, now seen corresponding path program 31 times [2021-08-21 12:14:21,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:21,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253752837] [2021-08-21 12:14:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:21,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:21,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:21,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253752837] [2021-08-21 12:14:21,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253752837] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:21,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:21,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:21,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380327456] [2021-08-21 12:14:21,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:21,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:21,256 INFO L87 Difference]: Start difference. First operand 150 states and 446 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:21,336 INFO L93 Difference]: Finished difference Result 269 states and 726 transitions. [2021-08-21 12:14:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:21,337 INFO L225 Difference]: With dead ends: 269 [2021-08-21 12:14:21,337 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 12:14:21,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 12:14:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 156. [2021-08-21 12:14:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-08-21 12:14:21,340 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 16 [2021-08-21 12:14:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:21,340 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-08-21 12:14:21,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-08-21 12:14:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:21,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:21,340 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:21,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-21 12:14:21,340 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash -7438129, now seen corresponding path program 32 times [2021-08-21 12:14:21,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:21,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387389784] [2021-08-21 12:14:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:21,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:21,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:21,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387389784] [2021-08-21 12:14:21,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387389784] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:21,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:21,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:21,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165232765] [2021-08-21 12:14:21,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:21,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:21,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:21,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:21,384 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:21,454 INFO L93 Difference]: Finished difference Result 254 states and 704 transitions. [2021-08-21 12:14:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:21,455 INFO L225 Difference]: With dead ends: 254 [2021-08-21 12:14:21,455 INFO L226 Difference]: Without dead ends: 249 [2021-08-21 12:14:21,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-21 12:14:21,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 148. [2021-08-21 12:14:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.006802721088435) internal successors, (442), 147 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 442 transitions. [2021-08-21 12:14:21,457 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 442 transitions. Word has length 16 [2021-08-21 12:14:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:21,457 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 442 transitions. [2021-08-21 12:14:21,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 442 transitions. [2021-08-21 12:14:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:21,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:21,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:21,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-21 12:14:21,458 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:21,458 INFO L82 PathProgramCache]: Analyzing trace with hash 499406830, now seen corresponding path program 33 times [2021-08-21 12:14:21,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:21,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622808393] [2021-08-21 12:14:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:21,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:21,509 INFO 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 12:14:21,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:21,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622808393] [2021-08-21 12:14:21,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622808393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:21,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094052630] [2021-08-21 12:14:21,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:21,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:21,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:21,511 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 12:14:21,512 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 12:14:22,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:22,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:22,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:22,552 INFO 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 12:14:22,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094052630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:22,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:22,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:22,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871762393] [2021-08-21 12:14:22,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:22,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:22,553 INFO L87 Difference]: Start difference. First operand 148 states and 442 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 12:14:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:22,648 INFO L93 Difference]: Finished difference Result 297 states and 849 transitions. [2021-08-21 12:14:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:22,649 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 16 [2021-08-21 12:14:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:22,649 INFO L225 Difference]: With dead ends: 297 [2021-08-21 12:14:22,649 INFO L226 Difference]: Without dead ends: 297 [2021-08-21 12:14:22,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-21 12:14:22,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 156. [2021-08-21 12:14:22,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.109677419354839) internal successors, (482), 155 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 482 transitions. [2021-08-21 12:14:22,652 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 482 transitions. Word has length 16 [2021-08-21 12:14:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:22,652 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 482 transitions. [2021-08-21 12:14:22,652 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 12:14:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 482 transitions. [2021-08-21 12:14:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:22,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:22,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:22,672 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 12:14:22,868 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,SelfDestructingSolverStorable103 [2021-08-21 12:14:22,869 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:22,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1693519483, now seen corresponding path program 33 times [2021-08-21 12:14:22,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:22,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738413477] [2021-08-21 12:14:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:22,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:22,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:22,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738413477] [2021-08-21 12:14:22,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738413477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:22,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486028526] [2021-08-21 12:14:22,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:22,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:22,941 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 12:14:22,942 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 12:14:23,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:23,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:23,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:24,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486028526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:24,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:24,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:24,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97095925] [2021-08-21 12:14:24,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:24,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:24,018 INFO L87 Difference]: Start difference. First operand 156 states and 482 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 12:14:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:24,108 INFO L93 Difference]: Finished difference Result 308 states and 850 transitions. [2021-08-21 12:14:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:24,108 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 16 [2021-08-21 12:14:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:24,109 INFO L225 Difference]: With dead ends: 308 [2021-08-21 12:14:24,109 INFO L226 Difference]: Without dead ends: 304 [2021-08-21 12:14:24,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-21 12:14:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 164. [2021-08-21 12:14:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 3.1104294478527605) internal successors, (507), 163 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 507 transitions. [2021-08-21 12:14:24,112 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 507 transitions. Word has length 16 [2021-08-21 12:14:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:24,112 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 507 transitions. [2021-08-21 12:14:24,112 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 12:14:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 507 transitions. [2021-08-21 12:14:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:24,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:24,112 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:24,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:24,326 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,SelfDestructingSolverStorable104 [2021-08-21 12:14:24,326 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1133049423, now seen corresponding path program 34 times [2021-08-21 12:14:24,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:24,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135408744] [2021-08-21 12:14:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:24,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:24,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:24,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135408744] [2021-08-21 12:14:24,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135408744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:24,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572922257] [2021-08-21 12:14:24,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:24,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:24,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:24,380 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 12:14:24,380 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 12:14:25,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:25,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:25,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572922257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:25,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:25,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:25,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551190876] [2021-08-21 12:14:25,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:25,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:25,463 INFO L87 Difference]: Start difference. First operand 164 states and 507 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:25,573 INFO L93 Difference]: Finished difference Result 320 states and 891 transitions. [2021-08-21 12:14:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:25,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:25,574 INFO L225 Difference]: With dead ends: 320 [2021-08-21 12:14:25,574 INFO L226 Difference]: Without dead ends: 320 [2021-08-21 12:14:25,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-21 12:14:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 164. [2021-08-21 12:14:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 3.1104294478527605) internal successors, (507), 163 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 507 transitions. [2021-08-21 12:14:25,577 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 507 transitions. Word has length 16 [2021-08-21 12:14:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:25,577 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 507 transitions. [2021-08-21 12:14:25,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 507 transitions. [2021-08-21 12:14:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:25,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:25,578 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:25,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:25,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:25,778 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:25,778 INFO L82 PathProgramCache]: Analyzing trace with hash -284095296, now seen corresponding path program 34 times [2021-08-21 12:14:25,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:25,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583438339] [2021-08-21 12:14:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:25,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:25,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:25,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583438339] [2021-08-21 12:14:25,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583438339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:25,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423442426] [2021-08-21 12:14:25,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:25,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:25,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:25,845 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 12:14:25,884 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 12:14:26,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:26,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423442426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:26,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:26,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:26,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192721599] [2021-08-21 12:14:26,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:26,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:26,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:26,931 INFO L87 Difference]: Start difference. First operand 164 states and 507 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:27,011 INFO L93 Difference]: Finished difference Result 297 states and 840 transitions. [2021-08-21 12:14:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:27,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:27,011 INFO L225 Difference]: With dead ends: 297 [2021-08-21 12:14:27,012 INFO L226 Difference]: Without dead ends: 294 [2021-08-21 12:14:27,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-08-21 12:14:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 158. [2021-08-21 12:14:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0573248407643314) internal successors, (480), 157 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 480 transitions. [2021-08-21 12:14:27,014 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 480 transitions. Word has length 16 [2021-08-21 12:14:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:27,014 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 480 transitions. [2021-08-21 12:14:27,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:27,014 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 480 transitions. [2021-08-21 12:14:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:27,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:27,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:27,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 12:14:27,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:27,215 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash 841990342, now seen corresponding path program 35 times [2021-08-21 12:14:27,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:27,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236958478] [2021-08-21 12:14:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:27,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:27,265 INFO 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 12:14:27,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:27,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236958478] [2021-08-21 12:14:27,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236958478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:27,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557655140] [2021-08-21 12:14:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:27,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:27,267 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 12:14:27,268 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 12:14:28,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:14:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:28,388 INFO 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 12:14:28,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557655140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:28,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:28,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:28,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653851339] [2021-08-21 12:14:28,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:28,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:28,389 INFO L87 Difference]: Start difference. First operand 158 states and 480 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 12:14:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:28,499 INFO L93 Difference]: Finished difference Result 295 states and 832 transitions. [2021-08-21 12:14:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:28,499 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 16 [2021-08-21 12:14:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:28,500 INFO L225 Difference]: With dead ends: 295 [2021-08-21 12:14:28,500 INFO L226 Difference]: Without dead ends: 295 [2021-08-21 12:14:28,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-21 12:14:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 160. [2021-08-21 12:14:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.069182389937107) internal successors, (488), 159 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 488 transitions. [2021-08-21 12:14:28,503 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 488 transitions. Word has length 16 [2021-08-21 12:14:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:28,503 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 488 transitions. [2021-08-21 12:14:28,503 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 12:14:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 488 transitions. [2021-08-21 12:14:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:28,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:28,503 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:28,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:28,706 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,SelfDestructingSolverStorable107 [2021-08-21 12:14:28,706 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:28,707 INFO L82 PathProgramCache]: Analyzing trace with hash 261516944, now seen corresponding path program 36 times [2021-08-21 12:14:28,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:28,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158138714] [2021-08-21 12:14:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:28,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:28,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:28,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158138714] [2021-08-21 12:14:28,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158138714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:28,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090465639] [2021-08-21 12:14:28,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:28,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:28,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:28,773 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 12:14:28,774 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 12:14:29,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:29,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:29,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090465639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:29,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:29,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:29,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024281798] [2021-08-21 12:14:29,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:29,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:29,871 INFO L87 Difference]: Start difference. First operand 160 states and 488 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:29,953 INFO L93 Difference]: Finished difference Result 273 states and 778 transitions. [2021-08-21 12:14:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:29,954 INFO L225 Difference]: With dead ends: 273 [2021-08-21 12:14:29,954 INFO L226 Difference]: Without dead ends: 271 [2021-08-21 12:14:29,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-21 12:14:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 158. [2021-08-21 12:14:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.0573248407643314) internal successors, (480), 157 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 480 transitions. [2021-08-21 12:14:29,957 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 480 transitions. Word has length 16 [2021-08-21 12:14:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:29,957 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 480 transitions. [2021-08-21 12:14:29,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 480 transitions. [2021-08-21 12:14:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:29,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:29,957 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:29,978 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 12:14:30,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:30,158 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:30,158 INFO L82 PathProgramCache]: Analyzing trace with hash 952085809, now seen corresponding path program 35 times [2021-08-21 12:14:30,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:30,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973592540] [2021-08-21 12:14:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:30,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:30,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:30,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973592540] [2021-08-21 12:14:30,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973592540] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:30,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:30,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:30,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187718306] [2021-08-21 12:14:30,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:30,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:30,206 INFO L87 Difference]: Start difference. First operand 158 states and 480 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:30,282 INFO L93 Difference]: Finished difference Result 296 states and 795 transitions. [2021-08-21 12:14:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:30,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:30,282 INFO L225 Difference]: With dead ends: 296 [2021-08-21 12:14:30,283 INFO L226 Difference]: Without dead ends: 292 [2021-08-21 12:14:30,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-21 12:14:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 160. [2021-08-21 12:14:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.0440251572327046) internal successors, (484), 159 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 484 transitions. [2021-08-21 12:14:30,285 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 484 transitions. Word has length 16 [2021-08-21 12:14:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:30,285 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 484 transitions. [2021-08-21 12:14:30,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 484 transitions. [2021-08-21 12:14:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:30,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:30,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:30,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-21 12:14:30,286 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1607875983, now seen corresponding path program 36 times [2021-08-21 12:14:30,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:30,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812651674] [2021-08-21 12:14:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:30,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:30,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:30,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812651674] [2021-08-21 12:14:30,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812651674] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:30,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:30,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:30,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11508475] [2021-08-21 12:14:30,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:30,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:30,333 INFO L87 Difference]: Start difference. First operand 160 states and 484 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:30,413 INFO L93 Difference]: Finished difference Result 279 states and 769 transitions. [2021-08-21 12:14:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:30,414 INFO L225 Difference]: With dead ends: 279 [2021-08-21 12:14:30,414 INFO L226 Difference]: Without dead ends: 276 [2021-08-21 12:14:30,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-21 12:14:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 159. [2021-08-21 12:14:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 3.0443037974683542) internal successors, (481), 158 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 481 transitions. [2021-08-21 12:14:30,416 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 481 transitions. Word has length 16 [2021-08-21 12:14:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:30,417 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 481 transitions. [2021-08-21 12:14:30,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 481 transitions. [2021-08-21 12:14:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:30,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:30,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:30,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-21 12:14:30,417 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash 252449827, now seen corresponding path program 37 times [2021-08-21 12:14:30,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:30,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909373020] [2021-08-21 12:14:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:30,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:30,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:30,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909373020] [2021-08-21 12:14:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909373020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:30,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416527995] [2021-08-21 12:14:30,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:30,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:30,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:30,502 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 12:14:30,503 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 12:14:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:31,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416527995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:31,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:31,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:31,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731950346] [2021-08-21 12:14:31,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:31,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:31,646 INFO L87 Difference]: Start difference. First operand 159 states and 481 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 12:14:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:31,868 INFO L93 Difference]: Finished difference Result 294 states and 799 transitions. [2021-08-21 12:14:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 16 [2021-08-21 12:14:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:31,869 INFO L225 Difference]: With dead ends: 294 [2021-08-21 12:14:31,869 INFO L226 Difference]: Without dead ends: 283 [2021-08-21 12:14:31,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:14:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-21 12:14:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-08-21 12:14:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.0268456375838926) internal successors, (451), 149 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 451 transitions. [2021-08-21 12:14:31,872 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 451 transitions. Word has length 16 [2021-08-21 12:14:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:31,872 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 451 transitions. [2021-08-21 12:14:31,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 12:14:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 451 transitions. [2021-08-21 12:14:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:31,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:31,872 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:31,891 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 12:14:32,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:32,073 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:32,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:32,073 INFO L82 PathProgramCache]: Analyzing trace with hash 17386768, now seen corresponding path program 37 times [2021-08-21 12:14:32,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:32,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615871610] [2021-08-21 12:14:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:32,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:32,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:32,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615871610] [2021-08-21 12:14:32,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615871610] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:32,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:32,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:32,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829909194] [2021-08-21 12:14:32,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:32,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:32,119 INFO L87 Difference]: Start difference. First operand 150 states and 451 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:32,192 INFO L93 Difference]: Finished difference Result 251 states and 704 transitions. [2021-08-21 12:14:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:32,193 INFO L225 Difference]: With dead ends: 251 [2021-08-21 12:14:32,193 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:14:32,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:14:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 152. [2021-08-21 12:14:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 3.013245033112583) internal successors, (455), 151 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 455 transitions. [2021-08-21 12:14:32,195 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 455 transitions. Word has length 16 [2021-08-21 12:14:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:32,195 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 455 transitions. [2021-08-21 12:14:32,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 455 transitions. [2021-08-21 12:14:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:32,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:32,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:32,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-08-21 12:14:32,196 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:32,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1079940808, now seen corresponding path program 38 times [2021-08-21 12:14:32,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:32,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239874171] [2021-08-21 12:14:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:32,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:32,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:32,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239874171] [2021-08-21 12:14:32,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239874171] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:32,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:32,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:32,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401596727] [2021-08-21 12:14:32,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:32,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:32,240 INFO L87 Difference]: Start difference. First operand 152 states and 455 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:32,319 INFO L93 Difference]: Finished difference Result 237 states and 683 transitions. [2021-08-21 12:14:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:32,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:32,320 INFO L225 Difference]: With dead ends: 237 [2021-08-21 12:14:32,320 INFO L226 Difference]: Without dead ends: 234 [2021-08-21 12:14:32,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-21 12:14:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 148. [2021-08-21 12:14:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 3.0136054421768708) internal successors, (443), 147 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 443 transitions. [2021-08-21 12:14:32,322 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 443 transitions. Word has length 16 [2021-08-21 12:14:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:32,322 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 443 transitions. [2021-08-21 12:14:32,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 443 transitions. [2021-08-21 12:14:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:32,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:32,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:32,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-08-21 12:14:32,323 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash 105733104, now seen corresponding path program 39 times [2021-08-21 12:14:32,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:32,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470430842] [2021-08-21 12:14:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:32,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:32,362 INFO 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 12:14:32,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:32,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470430842] [2021-08-21 12:14:32,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470430842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:32,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793236227] [2021-08-21 12:14:32,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:32,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:32,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:32,365 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 12:14:32,396 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 12:14:33,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:14:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:33,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:33,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793236227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:33,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:33,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:14:33,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342137719] [2021-08-21 12:14:33,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:14:33,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:14:33,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:14:33,481 INFO L87 Difference]: Start difference. First operand 148 states and 443 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:33,560 INFO L93 Difference]: Finished difference Result 245 states and 701 transitions. [2021-08-21 12:14:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:33,561 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 16 [2021-08-21 12:14:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:33,561 INFO L225 Difference]: With dead ends: 245 [2021-08-21 12:14:33,561 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 12:14:33,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 12:14:33,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 137. [2021-08-21 12:14:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0220588235294117) internal successors, (411), 136 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 411 transitions. [2021-08-21 12:14:33,563 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 411 transitions. Word has length 16 [2021-08-21 12:14:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:33,564 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 411 transitions. [2021-08-21 12:14:33,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 411 transitions. [2021-08-21 12:14:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:33,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:33,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:33,584 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 12:14:33,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 12:14:33,777 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:33,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1387284378, now seen corresponding path program 40 times [2021-08-21 12:14:33,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:33,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711446024] [2021-08-21 12:14:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:33,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:33,823 INFO 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 12:14:33,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:33,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711446024] [2021-08-21 12:14:33,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711446024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:33,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470285452] [2021-08-21 12:14:33,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:33,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:33,824 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 12:14:33,825 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 12:14:34,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:34,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:34,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:34,959 INFO 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 12:14:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470285452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:34,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:34,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:34,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017291433] [2021-08-21 12:14:34,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:34,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:34,960 INFO L87 Difference]: Start difference. First operand 137 states and 411 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:35,061 INFO L93 Difference]: Finished difference Result 240 states and 665 transitions. [2021-08-21 12:14:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:35,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:35,061 INFO L225 Difference]: With dead ends: 240 [2021-08-21 12:14:35,062 INFO L226 Difference]: Without dead ends: 240 [2021-08-21 12:14:35,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:35,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-21 12:14:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 135. [2021-08-21 12:14:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.9776119402985075) internal successors, (399), 134 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 399 transitions. [2021-08-21 12:14:35,064 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 399 transitions. Word has length 16 [2021-08-21 12:14:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 399 transitions. [2021-08-21 12:14:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 399 transitions. [2021-08-21 12:14:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:35,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:35,064 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:35,083 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 12:14:35,265 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,SelfDestructingSolverStorable115 [2021-08-21 12:14:35,265 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash 965653414, now seen corresponding path program 41 times [2021-08-21 12:14:35,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:35,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120652383] [2021-08-21 12:14:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:35,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:35,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:35,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120652383] [2021-08-21 12:14:35,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120652383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:35,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906172771] [2021-08-21 12:14:35,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:35,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:35,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:35,306 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 12:14:35,307 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 12:14:36,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:36,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:36,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906172771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:36,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:36,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:36,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945073712] [2021-08-21 12:14:36,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:36,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:36,420 INFO L87 Difference]: Start difference. First operand 135 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:36,530 INFO L93 Difference]: Finished difference Result 216 states and 610 transitions. [2021-08-21 12:14:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:36,531 INFO L225 Difference]: With dead ends: 216 [2021-08-21 12:14:36,531 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 12:14:36,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 12:14:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 125. [2021-08-21 12:14:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.9919354838709675) internal successors, (371), 124 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 371 transitions. [2021-08-21 12:14:36,533 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 371 transitions. Word has length 16 [2021-08-21 12:14:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:36,533 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 371 transitions. [2021-08-21 12:14:36,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 371 transitions. [2021-08-21 12:14:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:36,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:36,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:36,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 12:14:36,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 12:14:36,734 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:36,734 INFO L82 PathProgramCache]: Analyzing trace with hash 276172100, now seen corresponding path program 42 times [2021-08-21 12:14:36,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:36,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526466889] [2021-08-21 12:14:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:36,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:36,783 INFO 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 12:14:36,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:36,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526466889] [2021-08-21 12:14:36,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526466889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:36,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379349255] [2021-08-21 12:14:36,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:36,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:36,785 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 12:14:36,785 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 12:14:37,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:37,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:37,919 INFO 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 12:14:37,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379349255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:37,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:37,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:37,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703694736] [2021-08-21 12:14:37,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:37,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:37,920 INFO L87 Difference]: Start difference. First operand 125 states and 371 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:38,010 INFO L93 Difference]: Finished difference Result 197 states and 550 transitions. [2021-08-21 12:14:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 16 [2021-08-21 12:14:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:38,011 INFO L225 Difference]: With dead ends: 197 [2021-08-21 12:14:38,011 INFO L226 Difference]: Without dead ends: 197 [2021-08-21 12:14:38,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:14:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-08-21 12:14:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 129. [2021-08-21 12:14:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0234375) internal successors, (387), 128 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 387 transitions. [2021-08-21 12:14:38,013 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 387 transitions. Word has length 16 [2021-08-21 12:14:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:38,013 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 387 transitions. [2021-08-21 12:14:38,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 387 transitions. [2021-08-21 12:14:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:38,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:38,013 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:38,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 12:14:38,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:38,214 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:38,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1665857404, now seen corresponding path program 43 times [2021-08-21 12:14:38,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:38,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393809162] [2021-08-21 12:14:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:38,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:38,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:38,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393809162] [2021-08-21 12:14:38,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393809162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:38,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798678626] [2021-08-21 12:14:38,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:14:38,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:38,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:38,261 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 12:14:38,262 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 12:14:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:39,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798678626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:39,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:39,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:39,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307885062] [2021-08-21 12:14:39,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:39,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:39,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:39,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:39,412 INFO L87 Difference]: Start difference. First operand 129 states and 387 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:39,511 INFO L93 Difference]: Finished difference Result 199 states and 552 transitions. [2021-08-21 12:14:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:39,512 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:14:39,512 INFO L226 Difference]: Without dead ends: 197 [2021-08-21 12:14:39,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:14:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-08-21 12:14:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2021-08-21 12:14:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 3.007936507936508) internal successors, (379), 126 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 379 transitions. [2021-08-21 12:14:39,514 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 379 transitions. Word has length 16 [2021-08-21 12:14:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:39,514 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 379 transitions. [2021-08-21 12:14:39,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 379 transitions. [2021-08-21 12:14:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:39,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:39,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:39,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:39,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:39,715 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash -3204716, now seen corresponding path program 44 times [2021-08-21 12:14:39,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:39,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271740701] [2021-08-21 12:14:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:39,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:39,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:39,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271740701] [2021-08-21 12:14:39,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271740701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:39,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322292031] [2021-08-21 12:14:39,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:39,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:39,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:39,753 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 12:14:39,780 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 12:14:40,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:40,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:40,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:40,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322292031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:40,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:40,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:14:40,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844646890] [2021-08-21 12:14:40,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:14:40,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:40,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:14:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:14:40,899 INFO L87 Difference]: Start difference. First operand 127 states and 379 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:40,981 INFO L93 Difference]: Finished difference Result 178 states and 504 transitions. [2021-08-21 12:14:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:40,982 INFO L225 Difference]: With dead ends: 178 [2021-08-21 12:14:40,982 INFO L226 Difference]: Without dead ends: 174 [2021-08-21 12:14:40,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-21 12:14:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-08-21 12:14:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 3.016260162601626) internal successors, (371), 123 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 371 transitions. [2021-08-21 12:14:40,984 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 371 transitions. Word has length 16 [2021-08-21 12:14:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:40,984 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 371 transitions. [2021-08-21 12:14:40,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 371 transitions. [2021-08-21 12:14:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:40,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:40,984 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:41,004 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 12:14:41,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:41,185 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1122053733, now seen corresponding path program 38 times [2021-08-21 12:14:41,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:41,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895509978] [2021-08-21 12:14:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:41,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:41,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:41,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895509978] [2021-08-21 12:14:41,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895509978] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:41,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:41,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:41,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036121456] [2021-08-21 12:14:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:41,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:41,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:41,228 INFO L87 Difference]: Start difference. First operand 124 states and 371 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:41,307 INFO L93 Difference]: Finished difference Result 187 states and 507 transitions. [2021-08-21 12:14:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:41,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:41,308 INFO L225 Difference]: With dead ends: 187 [2021-08-21 12:14:41,308 INFO L226 Difference]: Without dead ends: 177 [2021-08-21 12:14:41,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-21 12:14:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 128. [2021-08-21 12:14:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.968503937007874) internal successors, (377), 127 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 377 transitions. [2021-08-21 12:14:41,310 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 377 transitions. Word has length 16 [2021-08-21 12:14:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:41,310 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 377 transitions. [2021-08-21 12:14:41,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 377 transitions. [2021-08-21 12:14:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:41,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:41,311 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-21 12:14:41,311 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash -702207835, now seen corresponding path program 39 times [2021-08-21 12:14:41,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:41,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500191434] [2021-08-21 12:14:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:41,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:41,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:41,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500191434] [2021-08-21 12:14:41,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500191434] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:41,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:41,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:41,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969495224] [2021-08-21 12:14:41,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:41,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:41,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:41,368 INFO L87 Difference]: Start difference. First operand 128 states and 377 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:41,463 INFO L93 Difference]: Finished difference Result 195 states and 514 transitions. [2021-08-21 12:14:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:41,464 INFO L225 Difference]: With dead ends: 195 [2021-08-21 12:14:41,464 INFO L226 Difference]: Without dead ends: 191 [2021-08-21 12:14:41,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-21 12:14:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 134. [2021-08-21 12:14:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.924812030075188) internal successors, (389), 133 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 389 transitions. [2021-08-21 12:14:41,466 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 389 transitions. Word has length 16 [2021-08-21 12:14:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:41,466 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 389 transitions. [2021-08-21 12:14:41,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 389 transitions. [2021-08-21 12:14:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:41,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:41,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:41,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-08-21 12:14:41,467 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1032797669, now seen corresponding path program 40 times [2021-08-21 12:14:41,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:41,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454583000] [2021-08-21 12:14:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:41,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:41,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:41,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454583000] [2021-08-21 12:14:41,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454583000] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:41,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:41,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:41,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806434220] [2021-08-21 12:14:41,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:41,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:41,517 INFO L87 Difference]: Start difference. First operand 134 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:41,596 INFO L93 Difference]: Finished difference Result 180 states and 492 transitions. [2021-08-21 12:14:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:41,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:41,597 INFO L225 Difference]: With dead ends: 180 [2021-08-21 12:14:41,597 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 12:14:41,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 12:14:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 126. [2021-08-21 12:14:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.984) internal successors, (373), 125 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 373 transitions. [2021-08-21 12:14:41,598 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 373 transitions. Word has length 16 [2021-08-21 12:14:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:41,598 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 373 transitions. [2021-08-21 12:14:41,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 373 transitions. [2021-08-21 12:14:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:41,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:41,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:41,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-08-21 12:14:41,599 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:41,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1714900367, now seen corresponding path program 41 times [2021-08-21 12:14:41,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:41,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289207682] [2021-08-21 12:14:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:41,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:41,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:41,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289207682] [2021-08-21 12:14:41,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289207682] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:41,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:41,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:41,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849142190] [2021-08-21 12:14:41,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:41,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:41,642 INFO L87 Difference]: Start difference. First operand 126 states and 373 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:41,723 INFO L93 Difference]: Finished difference Result 178 states and 483 transitions. [2021-08-21 12:14:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:41,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:41,724 INFO L225 Difference]: With dead ends: 178 [2021-08-21 12:14:41,724 INFO L226 Difference]: Without dead ends: 174 [2021-08-21 12:14:41,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-21 12:14:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 134. [2021-08-21 12:14:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.9323308270676693) internal successors, (390), 133 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 390 transitions. [2021-08-21 12:14:41,726 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 390 transitions. Word has length 16 [2021-08-21 12:14:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:41,726 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 390 transitions. [2021-08-21 12:14:41,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 390 transitions. [2021-08-21 12:14:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:41,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:41,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:41,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-08-21 12:14:41,726 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash 20105137, now seen corresponding path program 42 times [2021-08-21 12:14:41,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:41,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865309305] [2021-08-21 12:14:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:41,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:41,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:41,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865309305] [2021-08-21 12:14:41,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865309305] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:41,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:41,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:41,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428880787] [2021-08-21 12:14:41,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:41,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:41,766 INFO L87 Difference]: Start difference. First operand 134 states and 390 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:41,849 INFO L93 Difference]: Finished difference Result 176 states and 480 transitions. [2021-08-21 12:14:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:41,850 INFO L225 Difference]: With dead ends: 176 [2021-08-21 12:14:41,850 INFO L226 Difference]: Without dead ends: 173 [2021-08-21 12:14:41,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-08-21 12:14:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 133. [2021-08-21 12:14:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9318181818181817) internal successors, (387), 132 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 387 transitions. [2021-08-21 12:14:41,852 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 387 transitions. Word has length 16 [2021-08-21 12:14:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:41,852 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 387 transitions. [2021-08-21 12:14:41,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 387 transitions. [2021-08-21 12:14:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:41,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:41,852 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:41,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-08-21 12:14:41,852 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1588210045, now seen corresponding path program 43 times [2021-08-21 12:14:41,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:41,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594699854] [2021-08-21 12:14:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:41,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:41,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:41,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594699854] [2021-08-21 12:14:41,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594699854] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:41,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:41,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:41,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210938918] [2021-08-21 12:14:41,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:41,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:41,890 INFO L87 Difference]: Start difference. First operand 133 states and 387 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:41,954 INFO L93 Difference]: Finished difference Result 162 states and 458 transitions. [2021-08-21 12:14:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:41,954 INFO L225 Difference]: With dead ends: 162 [2021-08-21 12:14:41,954 INFO L226 Difference]: Without dead ends: 155 [2021-08-21 12:14:41,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-21 12:14:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 124. [2021-08-21 12:14:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 3.0) internal successors, (369), 123 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 369 transitions. [2021-08-21 12:14:41,956 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 369 transitions. Word has length 16 [2021-08-21 12:14:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:41,956 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 369 transitions. [2021-08-21 12:14:41,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 369 transitions. [2021-08-21 12:14:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:41,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:41,957 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:41,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-08-21 12:14:41,957 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -829290590, now seen corresponding path program 45 times [2021-08-21 12:14:41,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:41,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723514579] [2021-08-21 12:14:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:41,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:42,017 INFO 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 12:14:42,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:42,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723514579] [2021-08-21 12:14:42,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723514579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:42,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959085912] [2021-08-21 12:14:42,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:42,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:42,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:42,021 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 12:14:42,039 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 12:14:43,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:43,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:43,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959085912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:43,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:43,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:43,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300006282] [2021-08-21 12:14:43,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:43,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:43,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:43,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:43,226 INFO L87 Difference]: Start difference. First operand 124 states and 369 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 12:14:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:43,313 INFO L93 Difference]: Finished difference Result 206 states and 593 transitions. [2021-08-21 12:14:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:43,314 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 16 [2021-08-21 12:14:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:43,314 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:14:43,314 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:14:43,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:14:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 134. [2021-08-21 12:14:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.1503759398496243) internal successors, (419), 133 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 419 transitions. [2021-08-21 12:14:43,316 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 419 transitions. Word has length 16 [2021-08-21 12:14:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:43,316 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 419 transitions. [2021-08-21 12:14:43,316 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 12:14:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 419 transitions. [2021-08-21 12:14:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:43,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:43,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:43,338 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 12:14:43,524 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,SelfDestructingSolverStorable126 [2021-08-21 12:14:43,525 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 364822063, now seen corresponding path program 44 times [2021-08-21 12:14:43,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:43,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760720889] [2021-08-21 12:14:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:43,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:43,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:43,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760720889] [2021-08-21 12:14:43,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760720889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:43,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4776912] [2021-08-21 12:14:43,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:14:43,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:43,601 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 12:14:43,601 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 12:14:44,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:44,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:44,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:44,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:44,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4776912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:44,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:44,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:44,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811310312] [2021-08-21 12:14:44,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:44,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:44,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:44,816 INFO L87 Difference]: Start difference. First operand 134 states and 419 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:44,965 INFO L93 Difference]: Finished difference Result 228 states and 642 transitions. [2021-08-21 12:14:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:44,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:44,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:44,966 INFO L225 Difference]: With dead ends: 228 [2021-08-21 12:14:44,966 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:14:44,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:14:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 143. [2021-08-21 12:14:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.1619718309859155) internal successors, (449), 142 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 449 transitions. [2021-08-21 12:14:44,968 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 449 transitions. Word has length 16 [2021-08-21 12:14:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:44,969 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 449 transitions. [2021-08-21 12:14:44,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 449 transitions. [2021-08-21 12:14:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:44,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:44,969 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:44,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 12:14:45,176 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,SelfDestructingSolverStorable127 [2021-08-21 12:14:45,177 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1833220453, now seen corresponding path program 45 times [2021-08-21 12:14:45,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:45,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675766967] [2021-08-21 12:14:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:45,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:45,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:45,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675766967] [2021-08-21 12:14:45,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675766967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:45,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273112741] [2021-08-21 12:14:45,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:45,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:45,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:45,257 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 12:14:45,258 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 12:14:46,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:14:46,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:46,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273112741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:46,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:46,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:46,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466998151] [2021-08-21 12:14:46,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:46,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:46,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:46,594 INFO L87 Difference]: Start difference. First operand 143 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:46,742 INFO L93 Difference]: Finished difference Result 234 states and 665 transitions. [2021-08-21 12:14:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:46,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:46,743 INFO L225 Difference]: With dead ends: 234 [2021-08-21 12:14:46,743 INFO L226 Difference]: Without dead ends: 234 [2021-08-21 12:14:46,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-21 12:14:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 143. [2021-08-21 12:14:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.1619718309859155) internal successors, (449), 142 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 449 transitions. [2021-08-21 12:14:46,745 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 449 transitions. Word has length 16 [2021-08-21 12:14:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:46,746 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 449 transitions. [2021-08-21 12:14:46,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 449 transitions. [2021-08-21 12:14:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:46,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:46,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:46,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 12:14:46,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 12:14:46,947 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1612792716, now seen corresponding path program 46 times [2021-08-21 12:14:46,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:46,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352868073] [2021-08-21 12:14:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:46,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:47,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:47,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352868073] [2021-08-21 12:14:47,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352868073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:47,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497176864] [2021-08-21 12:14:47,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:47,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:47,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:47,020 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 12:14:47,021 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 12:14:48,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:48,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:48,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:48,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:48,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497176864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:48,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:48,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:14:48,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001456145] [2021-08-21 12:14:48,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:14:48,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:48,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:14:48,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:14:48,250 INFO L87 Difference]: Start difference. First operand 143 states and 449 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:48,384 INFO L93 Difference]: Finished difference Result 204 states and 583 transitions. [2021-08-21 12:14:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:48,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:14:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:48,384 INFO L225 Difference]: With dead ends: 204 [2021-08-21 12:14:48,385 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 12:14:48,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:14:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 12:14:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 143. [2021-08-21 12:14:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.119718309859155) internal successors, (443), 142 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 443 transitions. [2021-08-21 12:14:48,387 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 443 transitions. Word has length 16 [2021-08-21 12:14:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:48,387 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 443 transitions. [2021-08-21 12:14:48,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 12:14:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 443 transitions. [2021-08-21 12:14:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:48,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:48,387 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:48,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:48,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:48,588 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash -486707078, now seen corresponding path program 47 times [2021-08-21 12:14:48,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:48,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132557875] [2021-08-21 12:14:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:48,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:48,649 INFO 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 12:14:48,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:48,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132557875] [2021-08-21 12:14:48,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132557875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:48,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053540406] [2021-08-21 12:14:48,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:48,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:48,651 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 12:14:48,651 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 12:14:49,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:14:49,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:49,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:49,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:49,915 INFO 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 12:14:49,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053540406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:49,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:49,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:49,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933337371] [2021-08-21 12:14:49,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:49,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:49,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:49,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:49,916 INFO L87 Difference]: Start difference. First operand 143 states and 443 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 12:14:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:50,015 INFO L93 Difference]: Finished difference Result 241 states and 680 transitions. [2021-08-21 12:14:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:50,015 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 16 [2021-08-21 12:14:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:50,016 INFO L225 Difference]: With dead ends: 241 [2021-08-21 12:14:50,016 INFO L226 Difference]: Without dead ends: 241 [2021-08-21 12:14:50,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-21 12:14:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 145. [2021-08-21 12:14:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1319444444444446) internal successors, (451), 144 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 451 transitions. [2021-08-21 12:14:50,018 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 451 transitions. Word has length 16 [2021-08-21 12:14:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 451 transitions. [2021-08-21 12:14:50,018 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 12:14:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 451 transitions. [2021-08-21 12:14:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:50,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:50,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:50,038 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 12:14:50,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:50,238 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:50,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1067180476, now seen corresponding path program 48 times [2021-08-21 12:14:50,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:50,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069780785] [2021-08-21 12:14:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:50,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:50,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:50,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069780785] [2021-08-21 12:14:50,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069780785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:50,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648180689] [2021-08-21 12:14:50,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:14:50,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:50,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:50,288 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 12:14:50,324 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 12:14:51,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:14:51,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:51,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:51,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648180689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:51,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:51,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:51,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468217670] [2021-08-21 12:14:51,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:51,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:51,544 INFO L87 Difference]: Start difference. First operand 145 states and 451 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:51,627 INFO L93 Difference]: Finished difference Result 219 states and 626 transitions. [2021-08-21 12:14:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:51,628 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:14:51,628 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:14:51,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:14:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 143. [2021-08-21 12:14:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.119718309859155) internal successors, (443), 142 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 443 transitions. [2021-08-21 12:14:51,630 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 443 transitions. Word has length 16 [2021-08-21 12:14:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:51,630 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 443 transitions. [2021-08-21 12:14:51,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 443 transitions. [2021-08-21 12:14:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:51,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:51,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:51,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 12:14:51,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:51,845 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:51,845 INFO L82 PathProgramCache]: Analyzing trace with hash -376611611, now seen corresponding path program 46 times [2021-08-21 12:14:51,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:51,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409760860] [2021-08-21 12:14:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:51,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:51,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:51,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409760860] [2021-08-21 12:14:51,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409760860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:51,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:51,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:51,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551143029] [2021-08-21 12:14:51,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:51,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:51,893 INFO L87 Difference]: Start difference. First operand 143 states and 443 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:51,964 INFO L93 Difference]: Finished difference Result 252 states and 683 transitions. [2021-08-21 12:14:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:51,965 INFO L225 Difference]: With dead ends: 252 [2021-08-21 12:14:51,965 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:14:51,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:14:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 145. [2021-08-21 12:14:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.1041666666666665) internal successors, (447), 144 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 447 transitions. [2021-08-21 12:14:51,967 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 447 transitions. Word has length 16 [2021-08-21 12:14:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:51,967 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 447 transitions. [2021-08-21 12:14:51,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 447 transitions. [2021-08-21 12:14:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:51,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:51,968 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:51,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-08-21 12:14:51,968 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1358393893, now seen corresponding path program 47 times [2021-08-21 12:14:51,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:51,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056116452] [2021-08-21 12:14:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:51,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:52,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:52,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056116452] [2021-08-21 12:14:52,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056116452] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:52,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:52,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:52,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049698232] [2021-08-21 12:14:52,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:52,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:52,016 INFO L87 Difference]: Start difference. First operand 145 states and 447 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:52,099 INFO L93 Difference]: Finished difference Result 235 states and 657 transitions. [2021-08-21 12:14:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:52,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:52,100 INFO L225 Difference]: With dead ends: 235 [2021-08-21 12:14:52,100 INFO L226 Difference]: Without dead ends: 232 [2021-08-21 12:14:52,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-21 12:14:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 144. [2021-08-21 12:14:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.104895104895105) internal successors, (444), 143 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 444 transitions. [2021-08-21 12:14:52,102 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 444 transitions. Word has length 16 [2021-08-21 12:14:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:52,102 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 444 transitions. [2021-08-21 12:14:52,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 444 transitions. [2021-08-21 12:14:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:52,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:52,103 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:52,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-08-21 12:14:52,103 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:52,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1076247593, now seen corresponding path program 48 times [2021-08-21 12:14:52,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:52,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330982937] [2021-08-21 12:14:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:52,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:52,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:52,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330982937] [2021-08-21 12:14:52,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330982937] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:52,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:52,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:52,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406767250] [2021-08-21 12:14:52,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:52,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:52,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:52,169 INFO L87 Difference]: Start difference. First operand 144 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:52,286 INFO L93 Difference]: Finished difference Result 259 states and 721 transitions. [2021-08-21 12:14:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:52,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:52,287 INFO L225 Difference]: With dead ends: 259 [2021-08-21 12:14:52,287 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:14:52,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:14:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 144. [2021-08-21 12:14:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.104895104895105) internal successors, (444), 143 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 444 transitions. [2021-08-21 12:14:52,290 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 444 transitions. Word has length 16 [2021-08-21 12:14:52,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:52,290 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 444 transitions. [2021-08-21 12:14:52,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 444 transitions. [2021-08-21 12:14:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:52,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:52,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:52,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-08-21 12:14:52,290 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:52,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1311310652, now seen corresponding path program 49 times [2021-08-21 12:14:52,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:52,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258478327] [2021-08-21 12:14:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:52,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:52,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:52,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258478327] [2021-08-21 12:14:52,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258478327] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:52,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:52,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:52,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828703749] [2021-08-21 12:14:52,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:52,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:52,333 INFO L87 Difference]: Start difference. First operand 144 states and 444 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:52,432 INFO L93 Difference]: Finished difference Result 221 states and 606 transitions. [2021-08-21 12:14:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:52,433 INFO L225 Difference]: With dead ends: 221 [2021-08-21 12:14:52,433 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 12:14:52,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 12:14:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 146. [2021-08-21 12:14:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 3.089655172413793) internal successors, (448), 145 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 448 transitions. [2021-08-21 12:14:52,435 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 448 transitions. Word has length 16 [2021-08-21 12:14:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:52,435 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 448 transitions. [2021-08-21 12:14:52,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 448 transitions. [2021-08-21 12:14:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:52,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:52,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:52,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-08-21 12:14:52,436 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:52,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1886329068, now seen corresponding path program 50 times [2021-08-21 12:14:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:52,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041384686] [2021-08-21 12:14:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:52,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:52,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:52,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041384686] [2021-08-21 12:14:52,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041384686] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:52,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:52,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:52,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566836227] [2021-08-21 12:14:52,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:52,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:52,483 INFO L87 Difference]: Start difference. First operand 146 states and 448 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:52,584 INFO L93 Difference]: Finished difference Result 207 states and 585 transitions. [2021-08-21 12:14:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:52,585 INFO L225 Difference]: With dead ends: 207 [2021-08-21 12:14:52,585 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 12:14:52,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 12:14:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 144. [2021-08-21 12:14:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 3.090909090909091) internal successors, (442), 143 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 442 transitions. [2021-08-21 12:14:52,587 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 442 transitions. Word has length 16 [2021-08-21 12:14:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:52,587 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 442 transitions. [2021-08-21 12:14:52,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 442 transitions. [2021-08-21 12:14:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:52,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:52,588 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:52,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-08-21 12:14:52,588 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1701476098, now seen corresponding path program 51 times [2021-08-21 12:14:52,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:52,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879622421] [2021-08-21 12:14:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:52,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:52,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:52,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879622421] [2021-08-21 12:14:52,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879622421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:52,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216589721] [2021-08-21 12:14:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:14:52,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:52,643 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 12:14:52,644 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 12:14:53,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:14:53,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:53,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:53,932 INFO 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 12:14:53,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216589721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:53,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:53,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:53,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701028519] [2021-08-21 12:14:53,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:53,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:53,933 INFO L87 Difference]: Start difference. First operand 144 states and 442 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 12:14:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:54,022 INFO L93 Difference]: Finished difference Result 215 states and 605 transitions. [2021-08-21 12:14:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:54,023 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 16 [2021-08-21 12:14:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:54,024 INFO L225 Difference]: With dead ends: 215 [2021-08-21 12:14:54,024 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:14:54,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:14:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:14:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 143. [2021-08-21 12:14:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.0492957746478875) internal successors, (433), 142 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 433 transitions. [2021-08-21 12:14:54,026 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 433 transitions. Word has length 16 [2021-08-21 12:14:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:54,026 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 433 transitions. [2021-08-21 12:14:54,026 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 12:14:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 433 transitions. [2021-08-21 12:14:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:54,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:54,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:54,045 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 12:14:54,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:54,227 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1121002700, now seen corresponding path program 52 times [2021-08-21 12:14:54,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:54,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557172781] [2021-08-21 12:14:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:54,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:54,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:54,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557172781] [2021-08-21 12:14:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557172781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:54,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216536570] [2021-08-21 12:14:54,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:54,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:54,291 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 12:14:54,291 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 12:14:55,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:55,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:55,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:55,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216536570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:55,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:55,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:55,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365404655] [2021-08-21 12:14:55,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:55,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:55,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:55,569 INFO L87 Difference]: Start difference. First operand 143 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:55,666 INFO L93 Difference]: Finished difference Result 206 states and 578 transitions. [2021-08-21 12:14:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:55,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:55,667 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:14:55,667 INFO L226 Difference]: Without dead ends: 204 [2021-08-21 12:14:55,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:14:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-21 12:14:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 137. [2021-08-21 12:14:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0661764705882355) internal successors, (417), 136 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 417 transitions. [2021-08-21 12:14:55,669 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 417 transitions. Word has length 16 [2021-08-21 12:14:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:55,669 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 417 transitions. [2021-08-21 12:14:55,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 417 transitions. [2021-08-21 12:14:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:55,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:55,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:55,693 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 12:14:55,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:55,885 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541710, now seen corresponding path program 53 times [2021-08-21 12:14:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:55,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338907393] [2021-08-21 12:14:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:55,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:55,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:55,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338907393] [2021-08-21 12:14:55,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338907393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:55,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457415739] [2021-08-21 12:14:55,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:14:55,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:55,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:55,933 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 12:14:55,933 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 12:14:57,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:14:57,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:57,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457415739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:57,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:57,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:14:57,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437905642] [2021-08-21 12:14:57,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:14:57,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:14:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:57,195 INFO L87 Difference]: Start difference. First operand 137 states and 417 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:57,279 INFO L93 Difference]: Finished difference Result 185 states and 529 transitions. [2021-08-21 12:14:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:57,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:57,280 INFO L225 Difference]: With dead ends: 185 [2021-08-21 12:14:57,280 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 12:14:57,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:14:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 12:14:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 135. [2021-08-21 12:14:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.0522388059701493) internal successors, (409), 134 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 409 transitions. [2021-08-21 12:14:57,282 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 409 transitions. Word has length 16 [2021-08-21 12:14:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:57,282 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 409 transitions. [2021-08-21 12:14:57,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 409 transitions. [2021-08-21 12:14:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:57,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:57,283 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:57,302 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 12:14:57,483 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,SelfDestructingSolverStorable139 [2021-08-21 12:14:57,483 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash 211133711, now seen corresponding path program 49 times [2021-08-21 12:14:57,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:57,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699222037] [2021-08-21 12:14:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:57,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:57,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:57,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699222037] [2021-08-21 12:14:57,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699222037] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:57,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:57,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:57,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196872351] [2021-08-21 12:14:57,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:57,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:57,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:57,529 INFO L87 Difference]: Start difference. First operand 135 states and 409 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:57,600 INFO L93 Difference]: Finished difference Result 213 states and 580 transitions. [2021-08-21 12:14:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:57,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:57,601 INFO L225 Difference]: With dead ends: 213 [2021-08-21 12:14:57,601 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 12:14:57,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 12:14:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 139. [2021-08-21 12:14:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.028985507246377) internal successors, (418), 138 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 12:14:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 418 transitions. [2021-08-21 12:14:57,603 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 418 transitions. Word has length 16 [2021-08-21 12:14:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:57,603 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 418 transitions. [2021-08-21 12:14:57,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 418 transitions. [2021-08-21 12:14:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:57,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:57,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:57,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-08-21 12:14:57,604 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:57,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:57,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1946139215, now seen corresponding path program 50 times [2021-08-21 12:14:57,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:57,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96152744] [2021-08-21 12:14:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:57,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:57,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:57,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96152744] [2021-08-21 12:14:57,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96152744] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:57,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:57,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:57,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491871892] [2021-08-21 12:14:57,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:57,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:57,647 INFO L87 Difference]: Start difference. First operand 139 states and 418 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:57,715 INFO L93 Difference]: Finished difference Result 211 states and 577 transitions. [2021-08-21 12:14:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:57,715 INFO L225 Difference]: With dead ends: 211 [2021-08-21 12:14:57,716 INFO L226 Difference]: Without dead ends: 208 [2021-08-21 12:14:57,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-21 12:14:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2021-08-21 12:14:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 413 transitions. [2021-08-21 12:14:57,718 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 413 transitions. Word has length 16 [2021-08-21 12:14:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:57,718 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 413 transitions. [2021-08-21 12:14:57,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 413 transitions. [2021-08-21 12:14:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:57,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:57,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:57,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-08-21 12:14:57,718 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash 337824033, now seen corresponding path program 51 times [2021-08-21 12:14:57,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:57,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739172073] [2021-08-21 12:14:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:57,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:57,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:57,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739172073] [2021-08-21 12:14:57,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739172073] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:57,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:57,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:57,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737694308] [2021-08-21 12:14:57,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:57,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:57,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:57,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:57,760 INFO L87 Difference]: Start difference. First operand 137 states and 413 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:57,826 INFO L93 Difference]: Finished difference Result 199 states and 559 transitions. [2021-08-21 12:14:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:57,827 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:14:57,827 INFO L226 Difference]: Without dead ends: 194 [2021-08-21 12:14:57,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-08-21 12:14:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 136. [2021-08-21 12:14:57,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.037037037037037) internal successors, (410), 135 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 410 transitions. [2021-08-21 12:14:57,829 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 410 transitions. Word has length 16 [2021-08-21 12:14:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:57,829 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 410 transitions. [2021-08-21 12:14:57,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 410 transitions. [2021-08-21 12:14:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:57,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:57,829 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:57,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-08-21 12:14:57,829 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 605589317, now seen corresponding path program 52 times [2021-08-21 12:14:57,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:57,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189782579] [2021-08-21 12:14:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:57,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:14:57,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:57,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189782579] [2021-08-21 12:14:57,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189782579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:57,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812174162] [2021-08-21 12:14:57,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:14:57,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:57,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:14:57,894 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 12:14:57,895 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 12:14:59,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:14:59,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:14:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:14:59,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:14:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:59,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812174162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:14:59,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:14:59,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:14:59,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598681024] [2021-08-21 12:14:59,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:14:59,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:14:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:59,209 INFO L87 Difference]: Start difference. First operand 136 states and 410 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 12:14:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:59,388 INFO L93 Difference]: Finished difference Result 217 states and 593 transitions. [2021-08-21 12:14:59,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:14:59,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 16 [2021-08-21 12:14:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:59,389 INFO L225 Difference]: With dead ends: 217 [2021-08-21 12:14:59,389 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:14:59,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:14:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:14:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 133. [2021-08-21 12:14:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.977272727272727) internal successors, (393), 132 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 393 transitions. [2021-08-21 12:14:59,391 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 393 transitions. Word has length 16 [2021-08-21 12:14:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:59,391 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 393 transitions. [2021-08-21 12:14:59,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 12:14:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 393 transitions. [2021-08-21 12:14:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:59,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:59,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:59,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:14:59,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:14:59,592 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1431915621, now seen corresponding path program 53 times [2021-08-21 12:14:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748663723] [2021-08-21 12:14:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:59,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:59,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:59,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748663723] [2021-08-21 12:14:59,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748663723] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:59,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:59,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:59,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088795844] [2021-08-21 12:14:59,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:59,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:59,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:59,646 INFO L87 Difference]: Start difference. First operand 133 states and 393 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:59,713 INFO L93 Difference]: Finished difference Result 179 states and 510 transitions. [2021-08-21 12:14:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:59,714 INFO L225 Difference]: With dead ends: 179 [2021-08-21 12:14:59,714 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 12:14:59,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:14:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 12:14:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 126. [2021-08-21 12:14:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.016) internal successors, (377), 125 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 377 transitions. [2021-08-21 12:14:59,716 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 377 transitions. Word has length 16 [2021-08-21 12:14:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:59,716 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 377 transitions. [2021-08-21 12:14:59,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 377 transitions. [2021-08-21 12:14:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:59,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:59,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:59,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-08-21 12:14:59,716 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1229911596, now seen corresponding path program 54 times [2021-08-21 12:14:59,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:59,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45348224] [2021-08-21 12:14:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:59,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:59,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:59,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45348224] [2021-08-21 12:14:59,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45348224] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:59,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:59,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:59,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830205018] [2021-08-21 12:14:59,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:59,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:59,760 INFO L87 Difference]: Start difference. First operand 126 states and 377 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:14:59,858 INFO L93 Difference]: Finished difference Result 159 states and 445 transitions. [2021-08-21 12:14:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:14:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:14:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:14:59,858 INFO L225 Difference]: With dead ends: 159 [2021-08-21 12:14:59,858 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 12:14:59,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:14:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 12:14:59,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 133. [2021-08-21 12:14:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 132 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 392 transitions. [2021-08-21 12:14:59,860 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 392 transitions. Word has length 16 [2021-08-21 12:14:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:14:59,860 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 392 transitions. [2021-08-21 12:14:59,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:14:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 392 transitions. [2021-08-21 12:14:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:14:59,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:14:59,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:14:59,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-08-21 12:14:59,861 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:14:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:14:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1967728124, now seen corresponding path program 55 times [2021-08-21 12:14:59,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:14:59,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634201623] [2021-08-21 12:14:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:14:59,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:14:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:14:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:14:59,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:14:59,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634201623] [2021-08-21 12:14:59,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634201623] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:14:59,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:14:59,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:14:59,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965303102] [2021-08-21 12:14:59,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:14:59,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:14:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:14:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:14:59,905 INFO L87 Difference]: Start difference. First operand 133 states and 392 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:00,022 INFO L93 Difference]: Finished difference Result 158 states and 443 transitions. [2021-08-21 12:15:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:00,022 INFO L225 Difference]: With dead ends: 158 [2021-08-21 12:15:00,022 INFO L226 Difference]: Without dead ends: 155 [2021-08-21 12:15:00,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-21 12:15:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 132. [2021-08-21 12:15:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.969465648854962) internal successors, (389), 131 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 389 transitions. [2021-08-21 12:15:00,024 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 389 transitions. Word has length 16 [2021-08-21 12:15:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:00,024 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 389 transitions. [2021-08-21 12:15:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 389 transitions. [2021-08-21 12:15:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:00,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:00,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:00,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-08-21 12:15:00,025 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:00,025 INFO L82 PathProgramCache]: Analyzing trace with hash -178442636, now seen corresponding path program 56 times [2021-08-21 12:15:00,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:00,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615464600] [2021-08-21 12:15:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:00,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:00,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:00,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615464600] [2021-08-21 12:15:00,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615464600] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:00,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:00,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:00,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099309312] [2021-08-21 12:15:00,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:00,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:00,066 INFO L87 Difference]: Start difference. First operand 132 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:00,177 INFO L93 Difference]: Finished difference Result 145 states and 423 transitions. [2021-08-21 12:15:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:00,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:00,178 INFO L225 Difference]: With dead ends: 145 [2021-08-21 12:15:00,178 INFO L226 Difference]: Without dead ends: 140 [2021-08-21 12:15:00,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-21 12:15:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 126. [2021-08-21 12:15:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.008) internal successors, (376), 125 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 376 transitions. [2021-08-21 12:15:00,180 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 376 transitions. Word has length 16 [2021-08-21 12:15:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:00,180 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 376 transitions. [2021-08-21 12:15:00,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 376 transitions. [2021-08-21 12:15:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:00,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:00,180 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:00,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-08-21 12:15:00,180 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -559864088, now seen corresponding path program 57 times [2021-08-21 12:15:00,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:00,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130219474] [2021-08-21 12:15:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:00,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:00,235 INFO 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 12:15:00,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:00,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130219474] [2021-08-21 12:15:00,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130219474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:00,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113855728] [2021-08-21 12:15:00,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:00,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:00,236 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 12:15:00,237 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 12:15:01,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:01,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:01,589 INFO 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 12:15:01,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113855728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:01,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:01,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:01,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854297880] [2021-08-21 12:15:01,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:01,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:01,590 INFO L87 Difference]: Start difference. First operand 126 states and 376 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 12:15:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:01,671 INFO L93 Difference]: Finished difference Result 200 states and 564 transitions. [2021-08-21 12:15:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:01,672 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 16 [2021-08-21 12:15:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:01,672 INFO L225 Difference]: With dead ends: 200 [2021-08-21 12:15:01,672 INFO L226 Difference]: Without dead ends: 200 [2021-08-21 12:15:01,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-21 12:15:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 129. [2021-08-21 12:15:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0546875) internal successors, (391), 128 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 391 transitions. [2021-08-21 12:15:01,674 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 391 transitions. Word has length 16 [2021-08-21 12:15:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:01,674 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 391 transitions. [2021-08-21 12:15:01,674 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 12:15:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 391 transitions. [2021-08-21 12:15:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:01,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:01,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:01,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 12:15:01,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:01,875 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:01,875 INFO L82 PathProgramCache]: Analyzing trace with hash 634248565, now seen corresponding path program 54 times [2021-08-21 12:15:01,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:01,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869835730] [2021-08-21 12:15:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:01,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:01,940 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 12:15:01,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:01,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869835730] [2021-08-21 12:15:01,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869835730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:01,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162957575] [2021-08-21 12:15:01,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:01,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:01,941 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 12:15:01,942 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 12:15:03,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:15:03,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:03,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:03,285 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 12:15:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162957575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:03,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:03,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:15:03,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136705556] [2021-08-21 12:15:03,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:15:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:15:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:15:03,286 INFO L87 Difference]: Start difference. First operand 129 states and 391 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:03,409 INFO L93 Difference]: Finished difference Result 199 states and 565 transitions. [2021-08-21 12:15:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:03,409 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:15:03,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:03,410 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:15:03,410 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:15:03,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:15:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 136. [2021-08-21 12:15:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0444444444444443) internal successors, (411), 135 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 411 transitions. [2021-08-21 12:15:03,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 411 transitions. Word has length 16 [2021-08-21 12:15:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:03,412 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 411 transitions. [2021-08-21 12:15:03,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 411 transitions. [2021-08-21 12:15:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:03,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:03,412 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:03,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 12:15:03,628 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,SelfDestructingSolverStorable149 [2021-08-21 12:15:03,628 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:03,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:03,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2102646955, now seen corresponding path program 55 times [2021-08-21 12:15:03,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:03,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722362515] [2021-08-21 12:15:03,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:03,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:03,699 INFO 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 12:15:03,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:03,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722362515] [2021-08-21 12:15:03,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722362515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:03,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340604908] [2021-08-21 12:15:03,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:03,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:03,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:03,704 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 12:15:03,705 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 12:15:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:04,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:05,036 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 12:15:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340604908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:05,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:05,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:15:05,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387785843] [2021-08-21 12:15:05,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:15:05,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:15:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:15:05,037 INFO L87 Difference]: Start difference. First operand 136 states and 411 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:05,171 INFO L93 Difference]: Finished difference Result 201 states and 576 transitions. [2021-08-21 12:15:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:15:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:05,172 INFO L225 Difference]: With dead ends: 201 [2021-08-21 12:15:05,172 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 12:15:05,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 12:15:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 136. [2021-08-21 12:15:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.0444444444444443) internal successors, (411), 135 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 411 transitions. [2021-08-21 12:15:05,174 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 411 transitions. Word has length 16 [2021-08-21 12:15:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:05,174 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 411 transitions. [2021-08-21 12:15:05,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 411 transitions. [2021-08-21 12:15:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:05,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:05,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:05,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:05,388 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,SelfDestructingSolverStorable150 [2021-08-21 12:15:05,389 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1343366214, now seen corresponding path program 58 times [2021-08-21 12:15:05,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:05,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771437650] [2021-08-21 12:15:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:05,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:05,439 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 12:15:05,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:05,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771437650] [2021-08-21 12:15:05,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771437650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:05,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16477651] [2021-08-21 12:15:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:05,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:05,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:05,440 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 12:15:05,441 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 12:15:06,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:06,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:06,845 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 12:15:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16477651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:06,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:06,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:06,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655381531] [2021-08-21 12:15:06,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:06,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:06,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:06,846 INFO L87 Difference]: Start difference. First operand 136 states and 411 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:06,941 INFO L93 Difference]: Finished difference Result 206 states and 579 transitions. [2021-08-21 12:15:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:06,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:06,942 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:15:06,942 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 12:15:06,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 12:15:06,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 133. [2021-08-21 12:15:06,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.022727272727273) internal successors, (399), 132 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 399 transitions. [2021-08-21 12:15:06,944 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 399 transitions. Word has length 16 [2021-08-21 12:15:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:06,945 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 399 transitions. [2021-08-21 12:15:06,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 399 transitions. [2021-08-21 12:15:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:06,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:06,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:06,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 12:15:07,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:07,161 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1228906275, now seen corresponding path program 56 times [2021-08-21 12:15:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:07,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507824768] [2021-08-21 12:15:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:07,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:07,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:07,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507824768] [2021-08-21 12:15:07,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507824768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:07,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146586836] [2021-08-21 12:15:07,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:07,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:07,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:07,234 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 12:15:07,234 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 12:15:08,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:08,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:08,575 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 12:15:08,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146586836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:08,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:08,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:15:08,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23599616] [2021-08-21 12:15:08,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:15:08,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:15:08,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:15:08,576 INFO L87 Difference]: Start difference. First operand 133 states and 399 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:08,706 INFO L93 Difference]: Finished difference Result 220 states and 639 transitions. [2021-08-21 12:15:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:15:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:08,706 INFO L225 Difference]: With dead ends: 220 [2021-08-21 12:15:08,706 INFO L226 Difference]: Without dead ends: 220 [2021-08-21 12:15:08,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-21 12:15:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2021-08-21 12:15:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.022727272727273) internal successors, (399), 132 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 399 transitions. [2021-08-21 12:15:08,709 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 399 transitions. Word has length 16 [2021-08-21 12:15:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:08,709 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 399 transitions. [2021-08-21 12:15:08,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 399 transitions. [2021-08-21 12:15:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:08,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:08,709 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:08,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:08,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:08,910 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1361800240, now seen corresponding path program 59 times [2021-08-21 12:15:08,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:08,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415042993] [2021-08-21 12:15:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:08,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:08,953 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 12:15:08,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:08,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415042993] [2021-08-21 12:15:08,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415042993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:08,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375119108] [2021-08-21 12:15:08,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:08,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:08,954 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 12:15:08,954 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 12:15:10,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:10,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:10,303 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 12:15:10,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375119108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:10,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:10,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:15:10,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961791822] [2021-08-21 12:15:10,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:15:10,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:15:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:10,304 INFO L87 Difference]: Start difference. First operand 133 states and 399 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:10,376 INFO L93 Difference]: Finished difference Result 199 states and 553 transitions. [2021-08-21 12:15:10,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 16 [2021-08-21 12:15:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:10,377 INFO L225 Difference]: With dead ends: 199 [2021-08-21 12:15:10,377 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 12:15:10,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 12:15:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 130. [2021-08-21 12:15:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 3.0) internal successors, (387), 129 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 387 transitions. [2021-08-21 12:15:10,379 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 387 transitions. Word has length 16 [2021-08-21 12:15:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:10,379 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 387 transitions. [2021-08-21 12:15:10,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 387 transitions. [2021-08-21 12:15:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:10,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:10,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:10,399 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 12:15:10,580 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,SelfDestructingSolverStorable153 [2021-08-21 12:15:10,580 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash 715084590, now seen corresponding path program 60 times [2021-08-21 12:15:10,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:10,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968932364] [2021-08-21 12:15:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:10,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:10,635 INFO 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 12:15:10,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:10,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968932364] [2021-08-21 12:15:10,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968932364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:10,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941357883] [2021-08-21 12:15:10,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:10,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:10,636 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 12:15:10,637 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 12:15:11,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:15:11,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:11,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:12,037 INFO 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 12:15:12,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941357883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:12,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:12,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:12,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584765115] [2021-08-21 12:15:12,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:12,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:12,038 INFO L87 Difference]: Start difference. First operand 130 states and 387 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 12:15:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:12,123 INFO L93 Difference]: Finished difference Result 267 states and 740 transitions. [2021-08-21 12:15:12,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:12,123 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 16 [2021-08-21 12:15:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:12,124 INFO L225 Difference]: With dead ends: 267 [2021-08-21 12:15:12,124 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 12:15:12,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 12:15:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 138. [2021-08-21 12:15:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.116788321167883) internal successors, (427), 137 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 427 transitions. [2021-08-21 12:15:12,126 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 427 transitions. Word has length 16 [2021-08-21 12:15:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:12,126 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 427 transitions. [2021-08-21 12:15:12,126 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 12:15:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 427 transitions. [2021-08-21 12:15:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:12,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:12,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:12,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 12:15:12,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:12,327 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:12,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1909197243, now seen corresponding path program 57 times [2021-08-21 12:15:12,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:12,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563129884] [2021-08-21 12:15:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:12,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:12,379 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 12:15:12,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563129884] [2021-08-21 12:15:12,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563129884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843371095] [2021-08-21 12:15:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:12,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:12,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:12,380 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 12:15:12,381 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 12:15:13,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:13,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:13,789 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 12:15:13,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843371095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:13,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:13,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:15:13,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913182186] [2021-08-21 12:15:13,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:15:13,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:15:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:13,790 INFO L87 Difference]: Start difference. First operand 138 states and 427 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:13,880 INFO L93 Difference]: Finished difference Result 271 states and 760 transitions. [2021-08-21 12:15:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 16 [2021-08-21 12:15:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:13,881 INFO L225 Difference]: With dead ends: 271 [2021-08-21 12:15:13,881 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 12:15:13,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:15:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 12:15:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 142. [2021-08-21 12:15:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.148936170212766) internal successors, (444), 141 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 444 transitions. [2021-08-21 12:15:13,883 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 444 transitions. Word has length 16 [2021-08-21 12:15:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:13,883 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 444 transitions. [2021-08-21 12:15:13,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 444 transitions. [2021-08-21 12:15:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:13,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:13,884 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:13,904 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 12:15:14,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 12:15:14,084 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:14,085 INFO L82 PathProgramCache]: Analyzing trace with hash -917371663, now seen corresponding path program 58 times [2021-08-21 12:15:14,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:14,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883907158] [2021-08-21 12:15:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:14,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:14,150 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 12:15:14,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:14,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883907158] [2021-08-21 12:15:14,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883907158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:14,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094268490] [2021-08-21 12:15:14,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:14,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:14,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:14,152 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 12:15:14,152 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 12:15:15,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:15,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:15,573 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 12:15:15,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094268490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:15,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:15,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:15:15,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856648189] [2021-08-21 12:15:15,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:15:15,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:15:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:15,575 INFO L87 Difference]: Start difference. First operand 142 states and 444 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 12:15:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:15,663 INFO L93 Difference]: Finished difference Result 275 states and 785 transitions. [2021-08-21 12:15:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:15,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:15,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:15,664 INFO L225 Difference]: With dead ends: 275 [2021-08-21 12:15:15,664 INFO L226 Difference]: Without dead ends: 275 [2021-08-21 12:15:15,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:15:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-21 12:15:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 139. [2021-08-21 12:15:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.108695652173913) internal successors, (429), 138 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 429 transitions. [2021-08-21 12:15:15,667 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 429 transitions. Word has length 16 [2021-08-21 12:15:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:15,667 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 429 transitions. [2021-08-21 12:15:15,667 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 12:15:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 429 transitions. [2021-08-21 12:15:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:15,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:15,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:15,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:15,867 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,SelfDestructingSolverStorable156 [2021-08-21 12:15:15,868 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash -68417536, now seen corresponding path program 61 times [2021-08-21 12:15:15,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:15,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786877503] [2021-08-21 12:15:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:15,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:15,922 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 12:15:15,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:15,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786877503] [2021-08-21 12:15:15,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786877503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:15,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564447108] [2021-08-21 12:15:15,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:15,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:15,923 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 12:15:15,924 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 12:15:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:17,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:17,416 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 12:15:17,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564447108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:17,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:17,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:17,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177897619] [2021-08-21 12:15:17,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:17,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:17,417 INFO L87 Difference]: Start difference. First operand 139 states and 429 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:17,498 INFO L93 Difference]: Finished difference Result 257 states and 702 transitions. [2021-08-21 12:15:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:17,498 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:17,499 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:15:17,499 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 12:15:17,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 12:15:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 139. [2021-08-21 12:15:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0652173913043477) internal successors, (423), 138 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 423 transitions. [2021-08-21 12:15:17,501 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 423 transitions. Word has length 16 [2021-08-21 12:15:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:17,501 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 423 transitions. [2021-08-21 12:15:17,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 423 transitions. [2021-08-21 12:15:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:17,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:17,502 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:17,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 12:15:17,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:17,702 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:17,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1057668102, now seen corresponding path program 62 times [2021-08-21 12:15:17,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:17,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853156938] [2021-08-21 12:15:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:17,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:17,758 INFO 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 12:15:17,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:17,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853156938] [2021-08-21 12:15:17,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853156938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:17,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906791990] [2021-08-21 12:15:17,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:17,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:17,759 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 12:15:17,759 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 12:15:19,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:19,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:19,207 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 12:15:19,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906791990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:19,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:19,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:19,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204426782] [2021-08-21 12:15:19,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:19,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:19,208 INFO L87 Difference]: Start difference. First operand 139 states and 423 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 12:15:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:19,320 INFO L93 Difference]: Finished difference Result 239 states and 660 transitions. [2021-08-21 12:15:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:19,320 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 16 [2021-08-21 12:15:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:19,321 INFO L225 Difference]: With dead ends: 239 [2021-08-21 12:15:19,321 INFO L226 Difference]: Without dead ends: 239 [2021-08-21 12:15:19,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:19,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-21 12:15:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 134. [2021-08-21 12:15:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.045112781954887) internal successors, (405), 133 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 405 transitions. [2021-08-21 12:15:19,323 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 405 transitions. Word has length 16 [2021-08-21 12:15:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:19,323 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 405 transitions. [2021-08-21 12:15:19,323 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 12:15:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 405 transitions. [2021-08-21 12:15:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:19,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:19,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:19,343 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 12:15:19,524 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,SelfDestructingSolverStorable158 [2021-08-21 12:15:19,524 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:19,524 INFO L82 PathProgramCache]: Analyzing trace with hash 477194704, now seen corresponding path program 63 times [2021-08-21 12:15:19,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:19,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077025996] [2021-08-21 12:15:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:19,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:19,574 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 12:15:19,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:19,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077025996] [2021-08-21 12:15:19,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077025996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:19,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214099731] [2021-08-21 12:15:19,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:19,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:19,575 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 12:15:19,575 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 12:15:20,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:20,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:20,999 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 12:15:20,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214099731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:20,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:20,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:20,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910523993] [2021-08-21 12:15:20,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:20,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:21,000 INFO L87 Difference]: Start difference. First operand 134 states and 405 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:21,088 INFO L93 Difference]: Finished difference Result 217 states and 606 transitions. [2021-08-21 12:15:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:21,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:21,089 INFO L225 Difference]: With dead ends: 217 [2021-08-21 12:15:21,089 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:15:21,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:15:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 132. [2021-08-21 12:15:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.030534351145038) internal successors, (397), 131 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 397 transitions. [2021-08-21 12:15:21,091 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 397 transitions. Word has length 16 [2021-08-21 12:15:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:21,091 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 397 transitions. [2021-08-21 12:15:21,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 397 transitions. [2021-08-21 12:15:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:21,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:21,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:21,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 12:15:21,292 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,SelfDestructingSolverStorable159 [2021-08-21 12:15:21,292 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1167763569, now seen corresponding path program 59 times [2021-08-21 12:15:21,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:21,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978142559] [2021-08-21 12:15:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:21,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:21,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:21,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978142559] [2021-08-21 12:15:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978142559] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:21,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:21,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:21,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343294688] [2021-08-21 12:15:21,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:21,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:21,352 INFO L87 Difference]: Start difference. First operand 132 states and 397 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:21,428 INFO L93 Difference]: Finished difference Result 227 states and 624 transitions. [2021-08-21 12:15:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:21,428 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:15:21,429 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 12:15:21,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 12:15:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 134. [2021-08-21 12:15:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 3.0150375939849625) internal successors, (401), 133 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 401 transitions. [2021-08-21 12:15:21,431 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 401 transitions. Word has length 16 [2021-08-21 12:15:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:21,431 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 401 transitions. [2021-08-21 12:15:21,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 401 transitions. [2021-08-21 12:15:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:21,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:21,431 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:21,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-08-21 12:15:21,431 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:21,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1392198223, now seen corresponding path program 60 times [2021-08-21 12:15:21,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:21,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781185900] [2021-08-21 12:15:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:21,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:21,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:21,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781185900] [2021-08-21 12:15:21,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781185900] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:21,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:21,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:21,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387176197] [2021-08-21 12:15:21,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:21,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:21,474 INFO L87 Difference]: Start difference. First operand 134 states and 401 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:21,554 INFO L93 Difference]: Finished difference Result 210 states and 598 transitions. [2021-08-21 12:15:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:21,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:21,554 INFO L225 Difference]: With dead ends: 210 [2021-08-21 12:15:21,554 INFO L226 Difference]: Without dead ends: 207 [2021-08-21 12:15:21,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-21 12:15:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 133. [2021-08-21 12:15:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.015151515151515) internal successors, (398), 132 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 398 transitions. [2021-08-21 12:15:21,556 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 398 transitions. Word has length 16 [2021-08-21 12:15:21,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:21,556 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 398 transitions. [2021-08-21 12:15:21,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 398 transitions. [2021-08-21 12:15:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:21,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:21,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:21,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-08-21 12:15:21,557 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash 468127587, now seen corresponding path program 61 times [2021-08-21 12:15:21,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:21,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401107843] [2021-08-21 12:15:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:21,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:21,627 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 12:15:21,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:21,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401107843] [2021-08-21 12:15:21,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401107843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:21,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016457877] [2021-08-21 12:15:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:21,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:21,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:21,628 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 12:15:21,629 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 12:15:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:23,075 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 12:15:23,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016457877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:23,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:23,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:23,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896347912] [2021-08-21 12:15:23,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:23,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:23,076 INFO L87 Difference]: Start difference. First operand 133 states and 398 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:23,312 INFO L93 Difference]: Finished difference Result 238 states and 671 transitions. [2021-08-21 12:15:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:15:23,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 16 [2021-08-21 12:15:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:23,313 INFO L225 Difference]: With dead ends: 238 [2021-08-21 12:15:23,313 INFO L226 Difference]: Without dead ends: 227 [2021-08-21 12:15:23,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-08-21 12:15:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 133. [2021-08-21 12:15:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.015151515151515) internal successors, (398), 132 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 398 transitions. [2021-08-21 12:15:23,315 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 398 transitions. Word has length 16 [2021-08-21 12:15:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:23,315 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 398 transitions. [2021-08-21 12:15:23,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 398 transitions. [2021-08-21 12:15:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:23,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:23,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:23,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:15:23,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:23,516 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash 233064528, now seen corresponding path program 64 times [2021-08-21 12:15:23,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:23,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694061230] [2021-08-21 12:15:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:23,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:23,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:23,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694061230] [2021-08-21 12:15:23,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694061230] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:23,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:23,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:23,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983197471] [2021-08-21 12:15:23,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:23,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:23,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:23,565 INFO L87 Difference]: Start difference. First operand 133 states and 398 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:23,639 INFO L93 Difference]: Finished difference Result 227 states and 615 transitions. [2021-08-21 12:15:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:23,639 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:15:23,640 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:15:23,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:15:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 138. [2021-08-21 12:15:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.978102189781022) internal successors, (408), 137 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 408 transitions. [2021-08-21 12:15:23,642 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 408 transitions. Word has length 16 [2021-08-21 12:15:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:23,642 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 408 transitions. [2021-08-21 12:15:23,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 408 transitions. [2021-08-21 12:15:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:23,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:23,642 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:23,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-08-21 12:15:23,642 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash -864263048, now seen corresponding path program 65 times [2021-08-21 12:15:23,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:23,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237302526] [2021-08-21 12:15:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:23,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:23,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:23,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237302526] [2021-08-21 12:15:23,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237302526] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:23,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:23,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:23,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442898291] [2021-08-21 12:15:23,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:23,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:23,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:23,699 INFO L87 Difference]: Start difference. First operand 138 states and 408 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:23,775 INFO L93 Difference]: Finished difference Result 214 states and 596 transitions. [2021-08-21 12:15:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:23,775 INFO L225 Difference]: With dead ends: 214 [2021-08-21 12:15:23,775 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 12:15:23,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 12:15:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-08-21 12:15:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.0076335877862594) internal successors, (394), 131 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 394 transitions. [2021-08-21 12:15:23,777 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 394 transitions. Word has length 16 [2021-08-21 12:15:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:23,778 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 394 transitions. [2021-08-21 12:15:23,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 394 transitions. [2021-08-21 12:15:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:23,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:23,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:23,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-08-21 12:15:23,778 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1229710065, now seen corresponding path program 62 times [2021-08-21 12:15:23,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:23,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987224591] [2021-08-21 12:15:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:23,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:23,838 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 12:15:23,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:23,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987224591] [2021-08-21 12:15:23,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987224591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:23,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154251243] [2021-08-21 12:15:23,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:23,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:23,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:23,840 INFO L229 MonitoredProcess]: Starting monitored process 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 12:15:23,840 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 12:15:25,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:25,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:25,302 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 12:15:25,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154251243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:25,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:25,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:25,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082132744] [2021-08-21 12:15:25,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:25,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:25,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:25,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:25,303 INFO L87 Difference]: Start difference. First operand 132 states and 394 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:25,579 INFO L93 Difference]: Finished difference Result 296 states and 853 transitions. [2021-08-21 12:15:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:15:25,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 16 [2021-08-21 12:15:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:25,580 INFO L225 Difference]: With dead ends: 296 [2021-08-21 12:15:25,580 INFO L226 Difference]: Without dead ends: 285 [2021-08-21 12:15:25,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-21 12:15:25,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 132. [2021-08-21 12:15:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.0076335877862594) internal successors, (394), 131 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 394 transitions. [2021-08-21 12:15:25,582 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 394 transitions. Word has length 16 [2021-08-21 12:15:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:25,582 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 394 transitions. [2021-08-21 12:15:25,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 394 transitions. [2021-08-21 12:15:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:25,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:25,582 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:25,603 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 12:15:25,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:25,783 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash -605790848, now seen corresponding path program 66 times [2021-08-21 12:15:25,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:25,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690823247] [2021-08-21 12:15:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:25,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:25,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:25,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690823247] [2021-08-21 12:15:25,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690823247] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:25,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:25,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:25,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56520879] [2021-08-21 12:15:25,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:25,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:25,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:25,827 INFO L87 Difference]: Start difference. First operand 132 states and 394 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:25,898 INFO L93 Difference]: Finished difference Result 218 states and 587 transitions. [2021-08-21 12:15:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:25,899 INFO L225 Difference]: With dead ends: 218 [2021-08-21 12:15:25,899 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 12:15:25,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 12:15:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 133. [2021-08-21 12:15:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.992424242424242) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 395 transitions. [2021-08-21 12:15:25,901 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 395 transitions. Word has length 16 [2021-08-21 12:15:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:25,901 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 395 transitions. [2021-08-21 12:15:25,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 395 transitions. [2021-08-21 12:15:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:25,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:25,901 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:25,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-08-21 12:15:25,901 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash 820809850, now seen corresponding path program 67 times [2021-08-21 12:15:25,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:25,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129621387] [2021-08-21 12:15:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:25,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:25,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:25,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129621387] [2021-08-21 12:15:25,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129621387] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:25,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:25,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:25,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956078106] [2021-08-21 12:15:25,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:25,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:25,949 INFO L87 Difference]: Start difference. First operand 133 states and 395 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:26,026 INFO L93 Difference]: Finished difference Result 215 states and 577 transitions. [2021-08-21 12:15:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:26,027 INFO L225 Difference]: With dead ends: 215 [2021-08-21 12:15:26,027 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 12:15:26,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 12:15:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 138. [2021-08-21 12:15:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.9562043795620436) internal successors, (405), 137 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 405 transitions. [2021-08-21 12:15:26,029 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 405 transitions. Word has length 16 [2021-08-21 12:15:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:26,029 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 405 transitions. [2021-08-21 12:15:26,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 405 transitions. [2021-08-21 12:15:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:26,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:26,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:26,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-08-21 12:15:26,030 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:26,030 INFO L82 PathProgramCache]: Analyzing trace with hash -276517726, now seen corresponding path program 68 times [2021-08-21 12:15:26,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:26,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781857438] [2021-08-21 12:15:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:26,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:26,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:26,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781857438] [2021-08-21 12:15:26,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781857438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:26,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:26,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:26,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896253737] [2021-08-21 12:15:26,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:26,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:26,077 INFO L87 Difference]: Start difference. First operand 138 states and 405 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:26,154 INFO L93 Difference]: Finished difference Result 202 states and 558 transitions. [2021-08-21 12:15:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:26,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:26,154 INFO L225 Difference]: With dead ends: 202 [2021-08-21 12:15:26,154 INFO L226 Difference]: Without dead ends: 198 [2021-08-21 12:15:26,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-21 12:15:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 131. [2021-08-21 12:15:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 3.0) internal successors, (390), 130 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 390 transitions. [2021-08-21 12:15:26,156 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 390 transitions. Word has length 16 [2021-08-21 12:15:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:26,157 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 390 transitions. [2021-08-21 12:15:26,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 390 transitions. [2021-08-21 12:15:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:26,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:26,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:26,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-08-21 12:15:26,157 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:26,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2096747768, now seen corresponding path program 69 times [2021-08-21 12:15:26,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:26,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439797432] [2021-08-21 12:15:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:26,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:26,214 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 12:15:26,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:26,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439797432] [2021-08-21 12:15:26,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439797432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:26,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533666624] [2021-08-21 12:15:26,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:26,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:26,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:26,215 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 12:15:26,216 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 12:15:27,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:27,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:27,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:27,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533666624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:27,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:27,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:27,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090087209] [2021-08-21 12:15:27,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:27,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:27,718 INFO L87 Difference]: Start difference. First operand 131 states and 390 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 12:15:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:27,819 INFO L93 Difference]: Finished difference Result 217 states and 589 transitions. [2021-08-21 12:15:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:27,819 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 16 [2021-08-21 12:15:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:27,820 INFO L225 Difference]: With dead ends: 217 [2021-08-21 12:15:27,820 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:15:27,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:15:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 136. [2021-08-21 12:15:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.074074074074074) internal successors, (415), 135 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 415 transitions. [2021-08-21 12:15:27,822 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 415 transitions. Word has length 16 [2021-08-21 12:15:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:27,822 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 415 transitions. [2021-08-21 12:15:27,822 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 12:15:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 415 transitions. [2021-08-21 12:15:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:27,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:27,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:27,843 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 12:15:28,023 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,SelfDestructingSolverStorable169 [2021-08-21 12:15:28,023 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash -902635115, now seen corresponding path program 63 times [2021-08-21 12:15:28,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:28,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201800804] [2021-08-21 12:15:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:28,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:28,091 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 12:15:28,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:28,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201800804] [2021-08-21 12:15:28,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201800804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:28,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944929439] [2021-08-21 12:15:28,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:28,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:28,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:28,092 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 12:15:28,093 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 12:15:29,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:15:29,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:29,584 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 12:15:29,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944929439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:29,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:29,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:15:29,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784568163] [2021-08-21 12:15:29,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:15:29,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:15:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:15:29,585 INFO L87 Difference]: Start difference. First operand 136 states and 415 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:29,743 INFO L93 Difference]: Finished difference Result 211 states and 579 transitions. [2021-08-21 12:15:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:15:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:29,743 INFO L225 Difference]: With dead ends: 211 [2021-08-21 12:15:29,743 INFO L226 Difference]: Without dead ends: 207 [2021-08-21 12:15:29,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-21 12:15:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2021-08-21 12:15:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.1214285714285714) internal successors, (437), 140 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 437 transitions. [2021-08-21 12:15:29,746 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 437 transitions. Word has length 16 [2021-08-21 12:15:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:29,746 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 437 transitions. [2021-08-21 12:15:29,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 437 transitions. [2021-08-21 12:15:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:29,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:29,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:29,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 12:15:29,946 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,SelfDestructingSolverStorable170 [2021-08-21 12:15:29,947 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 565763275, now seen corresponding path program 64 times [2021-08-21 12:15:29,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:29,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220014078] [2021-08-21 12:15:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:29,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:30,033 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 12:15:30,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:30,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220014078] [2021-08-21 12:15:30,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220014078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:30,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406168095] [2021-08-21 12:15:30,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:30,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:30,035 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 12:15:30,056 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 12:15:31,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:31,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:31,551 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 12:15:31,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406168095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:31,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:31,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:15:31,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225248630] [2021-08-21 12:15:31,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:15:31,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:15:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:15:31,552 INFO L87 Difference]: Start difference. First operand 141 states and 437 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:31,720 INFO L93 Difference]: Finished difference Result 217 states and 602 transitions. [2021-08-21 12:15:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 16 [2021-08-21 12:15:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:31,721 INFO L225 Difference]: With dead ends: 217 [2021-08-21 12:15:31,721 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:15:31,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:15:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:15:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 138. [2021-08-21 12:15:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0802919708029197) internal successors, (422), 137 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 422 transitions. [2021-08-21 12:15:31,723 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 422 transitions. Word has length 16 [2021-08-21 12:15:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:31,724 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 422 transitions. [2021-08-21 12:15:31,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 422 transitions. [2021-08-21 12:15:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:31,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:31,724 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:31,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 12:15:31,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:31,924 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1414717402, now seen corresponding path program 70 times [2021-08-21 12:15:31,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:31,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670861017] [2021-08-21 12:15:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:31,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:31,994 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 12:15:31,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:31,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670861017] [2021-08-21 12:15:31,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670861017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:31,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321014424] [2021-08-21 12:15:31,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:31,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:31,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:31,995 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 12:15:31,995 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 12:15:33,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:33,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:33,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:33,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:33,521 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 12:15:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321014424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:33,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:33,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:33,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769785367] [2021-08-21 12:15:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:33,522 INFO L87 Difference]: Start difference. First operand 138 states and 422 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:33,609 INFO L93 Difference]: Finished difference Result 218 states and 588 transitions. [2021-08-21 12:15:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:33,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:33,609 INFO L225 Difference]: With dead ends: 218 [2021-08-21 12:15:33,609 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:15:33,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:15:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 138. [2021-08-21 12:15:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0364963503649633) internal successors, (416), 137 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 416 transitions. [2021-08-21 12:15:33,612 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 416 transitions. Word has length 16 [2021-08-21 12:15:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:33,612 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 416 transitions. [2021-08-21 12:15:33,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 416 transitions. [2021-08-21 12:15:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:33,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:33,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:33,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 12:15:33,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:33,813 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1754164256, now seen corresponding path program 71 times [2021-08-21 12:15:33,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:33,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711107304] [2021-08-21 12:15:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:33,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:33,879 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 12:15:33,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:33,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711107304] [2021-08-21 12:15:33,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711107304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:33,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931042710] [2021-08-21 12:15:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:33,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:33,880 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 12:15:33,880 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 12:15:35,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:15:35,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:35,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931042710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:35,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:35,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:35,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843351411] [2021-08-21 12:15:35,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:35,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:35,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:35,446 INFO L87 Difference]: Start difference. First operand 138 states and 416 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 12:15:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:35,534 INFO L93 Difference]: Finished difference Result 250 states and 667 transitions. [2021-08-21 12:15:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:35,535 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 16 [2021-08-21 12:15:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:35,535 INFO L225 Difference]: With dead ends: 250 [2021-08-21 12:15:35,535 INFO L226 Difference]: Without dead ends: 250 [2021-08-21 12:15:35,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-21 12:15:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2021-08-21 12:15:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.050359712230216) internal successors, (424), 139 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 424 transitions. [2021-08-21 12:15:35,537 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 424 transitions. Word has length 16 [2021-08-21 12:15:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:35,538 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 424 transitions. [2021-08-21 12:15:35,538 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 12:15:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 424 transitions. [2021-08-21 12:15:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:35,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:35,538 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:35,559 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 12:15:35,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:35,738 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1960329642, now seen corresponding path program 72 times [2021-08-21 12:15:35,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:35,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816870247] [2021-08-21 12:15:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:35,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:35,789 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 12:15:35,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816870247] [2021-08-21 12:15:35,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816870247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:35,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905311793] [2021-08-21 12:15:35,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:15:35,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:35,790 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 12:15:35,791 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 12:15:37,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:15:37,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:37,366 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 12:15:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905311793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:37,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:37,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:37,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674485372] [2021-08-21 12:15:37,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:37,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:37,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:37,367 INFO L87 Difference]: Start difference. First operand 140 states and 424 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:37,452 INFO L93 Difference]: Finished difference Result 228 states and 613 transitions. [2021-08-21 12:15:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:37,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:37,453 INFO L225 Difference]: With dead ends: 228 [2021-08-21 12:15:37,453 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 12:15:37,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 12:15:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 138. [2021-08-21 12:15:37,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0364963503649633) internal successors, (416), 137 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 416 transitions. [2021-08-21 12:15:37,455 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 416 transitions. Word has length 16 [2021-08-21 12:15:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:37,455 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 416 transitions. [2021-08-21 12:15:37,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 416 transitions. [2021-08-21 12:15:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:37,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:37,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:37,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 12:15:37,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:37,656 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1644068789, now seen corresponding path program 65 times [2021-08-21 12:15:37,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:37,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914082526] [2021-08-21 12:15:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:37,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:37,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:37,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914082526] [2021-08-21 12:15:37,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914082526] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:37,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:37,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:37,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945948420] [2021-08-21 12:15:37,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:37,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:37,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:37,703 INFO L87 Difference]: Start difference. First operand 138 states and 416 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:37,830 INFO L93 Difference]: Finished difference Result 235 states and 620 transitions. [2021-08-21 12:15:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:37,831 INFO L225 Difference]: With dead ends: 235 [2021-08-21 12:15:37,831 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:15:37,831 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 12:15:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:15:37,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2021-08-21 12:15:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.0215827338129495) internal successors, (420), 139 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 420 transitions. [2021-08-21 12:15:37,833 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 420 transitions. Word has length 16 [2021-08-21 12:15:37,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:37,833 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 420 transitions. [2021-08-21 12:15:37,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 420 transitions. [2021-08-21 12:15:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:37,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:37,833 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:37,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-08-21 12:15:37,834 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 90936715, now seen corresponding path program 66 times [2021-08-21 12:15:37,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:37,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642123434] [2021-08-21 12:15:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:37,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:37,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:37,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642123434] [2021-08-21 12:15:37,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642123434] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:37,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:37,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734731315] [2021-08-21 12:15:37,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:37,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:37,881 INFO L87 Difference]: Start difference. First operand 140 states and 420 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:37,986 INFO L93 Difference]: Finished difference Result 218 states and 594 transitions. [2021-08-21 12:15:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:37,987 INFO L225 Difference]: With dead ends: 218 [2021-08-21 12:15:37,987 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:15:37,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:15:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 138. [2021-08-21 12:15:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 3.0291970802919708) internal successors, (415), 137 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 415 transitions. [2021-08-21 12:15:37,989 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 415 transitions. Word has length 16 [2021-08-21 12:15:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:37,989 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 415 transitions. [2021-08-21 12:15:37,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 415 transitions. [2021-08-21 12:15:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:37,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:37,990 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:37,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-08-21 12:15:37,990 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:37,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:37,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1951262525, now seen corresponding path program 67 times [2021-08-21 12:15:37,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:37,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253073927] [2021-08-21 12:15:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:37,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:15:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:38,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253073927] [2021-08-21 12:15:38,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253073927] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:38,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:38,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:38,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323587694] [2021-08-21 12:15:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:38,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:38,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:38,057 INFO L87 Difference]: Start difference. First operand 138 states and 415 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:38,176 INFO L93 Difference]: Finished difference Result 242 states and 658 transitions. [2021-08-21 12:15:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:38,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:38,177 INFO L225 Difference]: With dead ends: 242 [2021-08-21 12:15:38,177 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:15:38,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:15:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 137. [2021-08-21 12:15:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.014705882352941) internal successors, (410), 136 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 410 transitions. [2021-08-21 12:15:38,179 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 410 transitions. Word has length 16 [2021-08-21 12:15:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:38,179 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 410 transitions. [2021-08-21 12:15:38,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 410 transitions. [2021-08-21 12:15:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:38,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:38,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:38,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-08-21 12:15:38,179 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1716199466, now seen corresponding path program 73 times [2021-08-21 12:15:38,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:38,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533842297] [2021-08-21 12:15:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:38,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:38,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:38,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533842297] [2021-08-21 12:15:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533842297] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:38,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:38,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:38,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965814054] [2021-08-21 12:15:38,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:38,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:38,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:38,229 INFO L87 Difference]: Start difference. First operand 137 states and 410 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:38,302 INFO L93 Difference]: Finished difference Result 234 states and 608 transitions. [2021-08-21 12:15:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:38,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:38,303 INFO L225 Difference]: With dead ends: 234 [2021-08-21 12:15:38,303 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:15:38,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:15:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-08-21 12:15:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0) internal successors, (414), 138 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 414 transitions. [2021-08-21 12:15:38,305 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 414 transitions. Word has length 16 [2021-08-21 12:15:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:38,305 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 414 transitions. [2021-08-21 12:15:38,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 414 transitions. [2021-08-21 12:15:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:38,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:38,306 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:38,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-08-21 12:15:38,306 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:38,306 INFO L82 PathProgramCache]: Analyzing trace with hash 618871890, now seen corresponding path program 74 times [2021-08-21 12:15:38,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:38,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469239633] [2021-08-21 12:15:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:38,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:38,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:38,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469239633] [2021-08-21 12:15:38,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469239633] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:38,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:38,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:38,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156031689] [2021-08-21 12:15:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:38,361 INFO L87 Difference]: Start difference. First operand 139 states and 414 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:38,443 INFO L93 Difference]: Finished difference Result 220 states and 587 transitions. [2021-08-21 12:15:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:38,444 INFO L225 Difference]: With dead ends: 220 [2021-08-21 12:15:38,444 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:15:38,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:15:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 137. [2021-08-21 12:15:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0) internal successors, (408), 136 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 408 transitions. [2021-08-21 12:15:38,446 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 408 transitions. Word has length 16 [2021-08-21 12:15:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:38,446 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 408 transitions. [2021-08-21 12:15:38,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 408 transitions. [2021-08-21 12:15:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:38,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:38,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:38,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-08-21 12:15:38,447 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash 434018920, now seen corresponding path program 75 times [2021-08-21 12:15:38,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:38,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615467745] [2021-08-21 12:15:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:38,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:38,504 INFO 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 12:15:38,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:38,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615467745] [2021-08-21 12:15:38,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615467745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:38,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345257016] [2021-08-21 12:15:38,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:15:38,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:38,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:38,505 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 12:15:38,506 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 12:15:40,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:15:40,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:40,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345257016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:40,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:40,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:40,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646201130] [2021-08-21 12:15:40,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:40,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:40,145 INFO L87 Difference]: Start difference. First operand 137 states and 408 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 12:15:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:40,233 INFO L93 Difference]: Finished difference Result 206 states and 557 transitions. [2021-08-21 12:15:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:40,233 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 16 [2021-08-21 12:15:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:40,233 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:15:40,233 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 12:15:40,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 12:15:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2021-08-21 12:15:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9555555555555557) internal successors, (399), 135 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 399 transitions. [2021-08-21 12:15:40,236 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 399 transitions. Word has length 16 [2021-08-21 12:15:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:40,236 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 399 transitions. [2021-08-21 12:15:40,236 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 12:15:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 399 transitions. [2021-08-21 12:15:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:40,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:40,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:40,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:40,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:40,454 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash -146454478, now seen corresponding path program 76 times [2021-08-21 12:15:40,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:40,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093056417] [2021-08-21 12:15:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:40,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:40,505 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 12:15:40,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093056417] [2021-08-21 12:15:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093056417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:40,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173527135] [2021-08-21 12:15:40,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:15:40,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:40,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:40,506 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 12:15:40,507 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 12:15:41,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:15:41,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:42,088 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 12:15:42,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173527135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:42,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:42,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:42,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985746708] [2021-08-21 12:15:42,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:42,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:42,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:42,089 INFO L87 Difference]: Start difference. First operand 136 states and 399 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:42,173 INFO L93 Difference]: Finished difference Result 197 states and 530 transitions. [2021-08-21 12:15:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:42,173 INFO L225 Difference]: With dead ends: 197 [2021-08-21 12:15:42,173 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 12:15:42,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:15:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 12:15:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2021-08-21 12:15:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.9689922480620154) internal successors, (383), 129 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 383 transitions. [2021-08-21 12:15:42,175 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 383 transitions. Word has length 16 [2021-08-21 12:15:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:42,175 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 383 transitions. [2021-08-21 12:15:42,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 383 transitions. [2021-08-21 12:15:42,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:42,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:42,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:42,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:42,376 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,SelfDestructingSolverStorable181 [2021-08-21 12:15:42,376 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash 980968408, now seen corresponding path program 77 times [2021-08-21 12:15:42,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:42,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501969419] [2021-08-21 12:15:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:42,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:42,422 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 12:15:42,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:42,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501969419] [2021-08-21 12:15:42,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501969419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:42,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366914158] [2021-08-21 12:15:42,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:42,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:42,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:42,424 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 12:15:42,425 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 12:15:43,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:44,023 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 12:15:44,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366914158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:44,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:44,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:15:44,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464860069] [2021-08-21 12:15:44,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:15:44,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:15:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:44,024 INFO L87 Difference]: Start difference. First operand 130 states and 383 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 12:15:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:44,102 INFO L93 Difference]: Finished difference Result 176 states and 481 transitions. [2021-08-21 12:15:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:44,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:44,102 INFO L225 Difference]: With dead ends: 176 [2021-08-21 12:15:44,102 INFO L226 Difference]: Without dead ends: 172 [2021-08-21 12:15:44,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:15:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-21 12:15:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2021-08-21 12:15:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.952755905511811) internal successors, (375), 127 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 375 transitions. [2021-08-21 12:15:44,104 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 375 transitions. Word has length 16 [2021-08-21 12:15:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:44,104 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 375 transitions. [2021-08-21 12:15:44,104 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 12:15:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 375 transitions. [2021-08-21 12:15:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:44,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:44,105 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:44,125 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 12:15:44,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:44,305 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1056323467, now seen corresponding path program 68 times [2021-08-21 12:15:44,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:44,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616730429] [2021-08-21 12:15:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:44,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:44,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:44,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616730429] [2021-08-21 12:15:44,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616730429] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:44,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:44,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:44,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474636596] [2021-08-21 12:15:44,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:44,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:44,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:44,356 INFO L87 Difference]: Start difference. First operand 128 states and 375 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:44,459 INFO L93 Difference]: Finished difference Result 175 states and 467 transitions. [2021-08-21 12:15:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:44,459 INFO L225 Difference]: With dead ends: 175 [2021-08-21 12:15:44,460 INFO L226 Difference]: Without dead ends: 171 [2021-08-21 12:15:44,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-21 12:15:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2021-08-21 12:15:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.931297709923664) internal successors, (384), 131 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 384 transitions. [2021-08-21 12:15:44,461 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 384 transitions. Word has length 16 [2021-08-21 12:15:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:44,461 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 384 transitions. [2021-08-21 12:15:44,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 384 transitions. [2021-08-21 12:15:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:44,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:44,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:44,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-08-21 12:15:44,462 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash 678682037, now seen corresponding path program 69 times [2021-08-21 12:15:44,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:44,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241264738] [2021-08-21 12:15:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:44,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:44,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:44,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241264738] [2021-08-21 12:15:44,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241264738] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:44,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:44,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:44,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665570160] [2021-08-21 12:15:44,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:44,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:44,508 INFO L87 Difference]: Start difference. First operand 132 states and 384 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:44,613 INFO L93 Difference]: Finished difference Result 173 states and 464 transitions. [2021-08-21 12:15:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:44,613 INFO L225 Difference]: With dead ends: 173 [2021-08-21 12:15:44,613 INFO L226 Difference]: Without dead ends: 170 [2021-08-21 12:15:44,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 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 12:15:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-21 12:15:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 130. [2021-08-21 12:15:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.937984496124031) internal successors, (379), 129 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 379 transitions. [2021-08-21 12:15:44,615 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 379 transitions. Word has length 16 [2021-08-21 12:15:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:44,615 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 379 transitions. [2021-08-21 12:15:44,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 379 transitions. [2021-08-21 12:15:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:44,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:44,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:44,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-08-21 12:15:44,616 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -929633145, now seen corresponding path program 70 times [2021-08-21 12:15:44,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:44,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453015222] [2021-08-21 12:15:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:44,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:44,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:44,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453015222] [2021-08-21 12:15:44,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453015222] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:44,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:44,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:44,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648280232] [2021-08-21 12:15:44,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:44,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:44,656 INFO L87 Difference]: Start difference. First operand 130 states and 379 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:44,747 INFO L93 Difference]: Finished difference Result 161 states and 446 transitions. [2021-08-21 12:15:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:44,748 INFO L225 Difference]: With dead ends: 161 [2021-08-21 12:15:44,748 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 12:15:44,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 12:15:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2021-08-21 12:15:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9375) internal successors, (376), 128 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 376 transitions. [2021-08-21 12:15:44,750 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 376 transitions. Word has length 16 [2021-08-21 12:15:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:44,750 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 376 transitions. [2021-08-21 12:15:44,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 376 transitions. [2021-08-21 12:15:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:44,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:44,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:44,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-08-21 12:15:44,751 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash -661867861, now seen corresponding path program 71 times [2021-08-21 12:15:44,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:44,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758153517] [2021-08-21 12:15:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:44,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:44,819 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 12:15:44,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:44,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758153517] [2021-08-21 12:15:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758153517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:44,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92190559] [2021-08-21 12:15:44,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:15:44,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:44,820 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 12:15:44,821 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 12:15:46,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:15:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:46,432 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 12:15:46,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92190559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:46,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:46,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:46,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656870785] [2021-08-21 12:15:46,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:46,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:46,433 INFO L87 Difference]: Start difference. First operand 129 states and 376 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:46,609 INFO L93 Difference]: Finished difference Result 208 states and 557 transitions. [2021-08-21 12:15:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:15:46,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 16 [2021-08-21 12:15:46,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:46,610 INFO L225 Difference]: With dead ends: 208 [2021-08-21 12:15:46,610 INFO L226 Difference]: Without dead ends: 197 [2021-08-21 12:15:46,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:15:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-08-21 12:15:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 131. [2021-08-21 12:15:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.953846153846154) internal successors, (384), 130 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 384 transitions. [2021-08-21 12:15:46,612 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 384 transitions. Word has length 16 [2021-08-21 12:15:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:46,612 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 384 transitions. [2021-08-21 12:15:46,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 384 transitions. [2021-08-21 12:15:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:46,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:46,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:46,633 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 12:15:46,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:46,813 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:46,813 INFO L82 PathProgramCache]: Analyzing trace with hash 164458443, now seen corresponding path program 72 times [2021-08-21 12:15:46,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:46,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705875709] [2021-08-21 12:15:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:46,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:46,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:46,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705875709] [2021-08-21 12:15:46,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705875709] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:46,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:46,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:46,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813817639] [2021-08-21 12:15:46,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:46,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:46,857 INFO L87 Difference]: Start difference. First operand 131 states and 384 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:46,956 INFO L93 Difference]: Finished difference Result 170 states and 474 transitions. [2021-08-21 12:15:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:46,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:46,957 INFO L225 Difference]: With dead ends: 170 [2021-08-21 12:15:46,957 INFO L226 Difference]: Without dead ends: 166 [2021-08-21 12:15:46,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-21 12:15:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 129. [2021-08-21 12:15:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9375) internal successors, (376), 128 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 376 transitions. [2021-08-21 12:15:46,959 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 376 transitions. Word has length 16 [2021-08-21 12:15:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:46,959 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 376 transitions. [2021-08-21 12:15:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 376 transitions. [2021-08-21 12:15:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:46,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:46,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:46,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-08-21 12:15:46,959 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:46,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1797598522, now seen corresponding path program 78 times [2021-08-21 12:15:46,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:46,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790718938] [2021-08-21 12:15:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:46,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:47,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:47,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790718938] [2021-08-21 12:15:47,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790718938] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:47,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:47,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:47,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663975772] [2021-08-21 12:15:47,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:47,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:47,007 INFO L87 Difference]: Start difference. First operand 129 states and 376 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:47,072 INFO L93 Difference]: Finished difference Result 186 states and 490 transitions. [2021-08-21 12:15:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:47,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:47,072 INFO L225 Difference]: With dead ends: 186 [2021-08-21 12:15:47,072 INFO L226 Difference]: Without dead ends: 183 [2021-08-21 12:15:47,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-21 12:15:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-08-21 12:15:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8962962962962964) internal successors, (391), 135 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 391 transitions. [2021-08-21 12:15:47,074 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 391 transitions. Word has length 16 [2021-08-21 12:15:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:47,074 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 391 transitions. [2021-08-21 12:15:47,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,075 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 391 transitions. [2021-08-21 12:15:47,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:47,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:47,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:47,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-08-21 12:15:47,075 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:47,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:47,075 INFO L82 PathProgramCache]: Analyzing trace with hash 700270946, now seen corresponding path program 79 times [2021-08-21 12:15:47,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:47,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080632030] [2021-08-21 12:15:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:47,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:47,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:47,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080632030] [2021-08-21 12:15:47,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080632030] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:47,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:47,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:47,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170693296] [2021-08-21 12:15:47,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:47,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:47,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:47,122 INFO L87 Difference]: Start difference. First operand 136 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:47,196 INFO L93 Difference]: Finished difference Result 185 states and 488 transitions. [2021-08-21 12:15:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:47,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:47,197 INFO L225 Difference]: With dead ends: 185 [2021-08-21 12:15:47,197 INFO L226 Difference]: Without dead ends: 182 [2021-08-21 12:15:47,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-21 12:15:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2021-08-21 12:15:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8955223880597014) internal successors, (388), 134 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 388 transitions. [2021-08-21 12:15:47,199 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 388 transitions. Word has length 16 [2021-08-21 12:15:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:47,199 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 388 transitions. [2021-08-21 12:15:47,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 388 transitions. [2021-08-21 12:15:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:47,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:47,199 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:47,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-08-21 12:15:47,200 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1445899814, now seen corresponding path program 80 times [2021-08-21 12:15:47,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:47,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835347] [2021-08-21 12:15:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:47,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:47,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:47,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835347] [2021-08-21 12:15:47,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835347] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:47,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:47,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:47,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253159195] [2021-08-21 12:15:47,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:47,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:47,251 INFO L87 Difference]: Start difference. First operand 135 states and 388 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:47,306 INFO L93 Difference]: Finished difference Result 172 states and 468 transitions. [2021-08-21 12:15:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:47,307 INFO L225 Difference]: With dead ends: 172 [2021-08-21 12:15:47,307 INFO L226 Difference]: Without dead ends: 167 [2021-08-21 12:15:47,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:15:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-21 12:15:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-08-21 12:15:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.9291338582677167) internal successors, (372), 127 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 372 transitions. [2021-08-21 12:15:47,309 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 372 transitions. Word has length 16 [2021-08-21 12:15:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:47,309 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 372 transitions. [2021-08-21 12:15:47,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 372 transitions. [2021-08-21 12:15:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:47,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:47,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:47,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-08-21 12:15:47,309 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:47,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1827046723, now seen corresponding path program 73 times [2021-08-21 12:15:47,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:47,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237763022] [2021-08-21 12:15:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:47,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:47,377 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 12:15:47,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:47,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237763022] [2021-08-21 12:15:47,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237763022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:47,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396592602] [2021-08-21 12:15:47,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:15:47,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:47,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:47,379 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 12:15:47,385 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 12:15:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:48,963 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 12:15:48,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396592602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:48,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:48,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:48,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469220665] [2021-08-21 12:15:48,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:48,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:48,964 INFO L87 Difference]: Start difference. First operand 128 states and 372 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:49,211 INFO L93 Difference]: Finished difference Result 227 states and 625 transitions. [2021-08-21 12:15:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:15:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 16 [2021-08-21 12:15:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:49,212 INFO L225 Difference]: With dead ends: 227 [2021-08-21 12:15:49,212 INFO L226 Difference]: Without dead ends: 216 [2021-08-21 12:15:49,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:15:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-21 12:15:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 120. [2021-08-21 12:15:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.9243697478991595) internal successors, (348), 119 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 348 transitions. [2021-08-21 12:15:49,214 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 348 transitions. Word has length 16 [2021-08-21 12:15:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:49,214 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 348 transitions. [2021-08-21 12:15:49,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 348 transitions. [2021-08-21 12:15:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:49,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:49,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:49,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 12:15:49,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:49,421 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1547666141, now seen corresponding path program 74 times [2021-08-21 12:15:49,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:49,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875979554] [2021-08-21 12:15:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:49,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:49,484 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 12:15:49,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:49,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875979554] [2021-08-21 12:15:49,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875979554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:49,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318348133] [2021-08-21 12:15:49,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:49,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:49,485 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 12:15:49,504 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 12:15:50,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:15:50,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:15:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:15:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:51,102 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 12:15:51,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318348133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:51,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:51,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:15:51,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210246463] [2021-08-21 12:15:51,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:15:51,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:15:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:51,103 INFO L87 Difference]: Start difference. First operand 120 states and 348 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:51,311 INFO L93 Difference]: Finished difference Result 186 states and 478 transitions. [2021-08-21 12:15:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:15:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 16 [2021-08-21 12:15:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:51,311 INFO L225 Difference]: With dead ends: 186 [2021-08-21 12:15:51,312 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 12:15:51,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 12:15:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 117. [2021-08-21 12:15:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.853448275862069) internal successors, (331), 116 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 331 transitions. [2021-08-21 12:15:51,313 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 331 transitions. Word has length 16 [2021-08-21 12:15:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:51,313 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 331 transitions. [2021-08-21 12:15:51,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 331 transitions. [2021-08-21 12:15:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:51,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:51,314 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:51,335 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 12:15:51,514 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,SelfDestructingSolverStorable192 [2021-08-21 12:15:51,514 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:51,515 INFO L82 PathProgramCache]: Analyzing trace with hash -721339837, now seen corresponding path program 75 times [2021-08-21 12:15:51,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:51,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634070195] [2021-08-21 12:15:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:51,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:51,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:51,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634070195] [2021-08-21 12:15:51,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634070195] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:51,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:51,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:51,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528733998] [2021-08-21 12:15:51,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:51,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:51,552 INFO L87 Difference]: Start difference. First operand 117 states and 331 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:51,644 INFO L93 Difference]: Finished difference Result 148 states and 395 transitions. [2021-08-21 12:15:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:51,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:51,644 INFO L225 Difference]: With dead ends: 148 [2021-08-21 12:15:51,644 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 12:15:51,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 12:15:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-08-21 12:15:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.8878504672897196) internal successors, (309), 107 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 309 transitions. [2021-08-21 12:15:51,646 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 309 transitions. Word has length 16 [2021-08-21 12:15:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:51,646 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 309 transitions. [2021-08-21 12:15:51,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 309 transitions. [2021-08-21 12:15:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:51,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:51,646 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:51,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-08-21 12:15:51,647 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1917579888, now seen corresponding path program 81 times [2021-08-21 12:15:51,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:51,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167294743] [2021-08-21 12:15:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:51,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:51,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:51,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167294743] [2021-08-21 12:15:51,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167294743] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:51,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:51,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:51,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544937939] [2021-08-21 12:15:51,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:51,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:51,687 INFO L87 Difference]: Start difference. First operand 108 states and 309 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:51,753 INFO L93 Difference]: Finished difference Result 135 states and 356 transitions. [2021-08-21 12:15:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:51,753 INFO L225 Difference]: With dead ends: 135 [2021-08-21 12:15:51,753 INFO L226 Difference]: Without dead ends: 129 [2021-08-21 12:15:51,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:51,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-21 12:15:51,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2021-08-21 12:15:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 312 transitions. [2021-08-21 12:15:51,755 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 312 transitions. Word has length 16 [2021-08-21 12:15:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:51,755 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 312 transitions. [2021-08-21 12:15:51,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 312 transitions. [2021-08-21 12:15:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:51,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:51,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:51,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2021-08-21 12:15:51,755 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:51,756 INFO L82 PathProgramCache]: Analyzing trace with hash -950786710, now seen corresponding path program 82 times [2021-08-21 12:15:51,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:51,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928879465] [2021-08-21 12:15:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:51,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:51,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:51,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928879465] [2021-08-21 12:15:51,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928879465] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:51,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:51,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:51,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373623577] [2021-08-21 12:15:51,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:51,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:51,800 INFO L87 Difference]: Start difference. First operand 110 states and 312 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:51,889 INFO L93 Difference]: Finished difference Result 145 states and 368 transitions. [2021-08-21 12:15:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:51,890 INFO L225 Difference]: With dead ends: 145 [2021-08-21 12:15:51,890 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 12:15:51,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 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 12:15:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 12:15:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2021-08-21 12:15:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.824561403508772) internal successors, (322), 114 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 322 transitions. [2021-08-21 12:15:51,891 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 322 transitions. Word has length 16 [2021-08-21 12:15:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:51,892 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 322 transitions. [2021-08-21 12:15:51,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 322 transitions. [2021-08-21 12:15:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:51,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:51,892 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:51,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2021-08-21 12:15:51,892 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2048114286, now seen corresponding path program 83 times [2021-08-21 12:15:51,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:51,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501021517] [2021-08-21 12:15:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:51,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:51,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:51,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501021517] [2021-08-21 12:15:51,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501021517] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:51,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:51,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:51,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266468780] [2021-08-21 12:15:51,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:51,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:51,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:51,936 INFO L87 Difference]: Start difference. First operand 115 states and 322 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:52,019 INFO L93 Difference]: Finished difference Result 132 states and 349 transitions. [2021-08-21 12:15:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:52,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:52,020 INFO L225 Difference]: With dead ends: 132 [2021-08-21 12:15:52,020 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 12:15:52,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 12:15:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 109. [2021-08-21 12:15:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 108 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 310 transitions. [2021-08-21 12:15:52,021 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 310 transitions. Word has length 16 [2021-08-21 12:15:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:52,022 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 310 transitions. [2021-08-21 12:15:52,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 310 transitions. [2021-08-21 12:15:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:52,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:52,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:52,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-08-21 12:15:52,022 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1457132976, now seen corresponding path program 84 times [2021-08-21 12:15:52,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:52,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331365003] [2021-08-21 12:15:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:52,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:52,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:52,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331365003] [2021-08-21 12:15:52,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331365003] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:52,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:52,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:52,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992679036] [2021-08-21 12:15:52,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:52,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:52,066 INFO L87 Difference]: Start difference. First operand 109 states and 310 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:52,148 INFO L93 Difference]: Finished difference Result 128 states and 338 transitions. [2021-08-21 12:15:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:52,149 INFO L225 Difference]: With dead ends: 128 [2021-08-21 12:15:52,149 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 12:15:52,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 12:15:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2021-08-21 12:15:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.8260869565217392) internal successors, (325), 115 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 325 transitions. [2021-08-21 12:15:52,150 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 325 transitions. Word has length 16 [2021-08-21 12:15:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 325 transitions. [2021-08-21 12:15:52,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 325 transitions. [2021-08-21 12:15:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:52,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:52,151 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:52,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-08-21 12:15:52,151 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1740506744, now seen corresponding path program 85 times [2021-08-21 12:15:52,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:52,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919042917] [2021-08-21 12:15:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:52,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:52,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:52,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919042917] [2021-08-21 12:15:52,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919042917] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:52,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:52,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:52,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499830554] [2021-08-21 12:15:52,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:52,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:52,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:52,199 INFO L87 Difference]: Start difference. First operand 116 states and 325 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:52,278 INFO L93 Difference]: Finished difference Result 127 states and 336 transitions. [2021-08-21 12:15:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:52,278 INFO L225 Difference]: With dead ends: 127 [2021-08-21 12:15:52,278 INFO L226 Difference]: Without dead ends: 124 [2021-08-21 12:15:52,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-21 12:15:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-08-21 12:15:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.824561403508772) internal successors, (322), 114 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 322 transitions. [2021-08-21 12:15:52,280 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 322 transitions. Word has length 16 [2021-08-21 12:15:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:52,280 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 322 transitions. [2021-08-21 12:15:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 322 transitions. [2021-08-21 12:15:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:15:52,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:52,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:52,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2021-08-21 12:15:52,280 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -405664016, now seen corresponding path program 86 times [2021-08-21 12:15:52,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:52,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981478875] [2021-08-21 12:15:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:52,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:52,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:52,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981478875] [2021-08-21 12:15:52,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981478875] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:15:52,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:15:52,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 12:15:52,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080837604] [2021-08-21 12:15:52,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:15:52,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:52,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:15:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:15:52,321 INFO L87 Difference]: Start difference. First operand 115 states and 322 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:52,375 INFO L93 Difference]: Finished difference Result 114 states and 316 transitions. [2021-08-21 12:15:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:15:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:15:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:52,376 INFO L225 Difference]: With dead ends: 114 [2021-08-21 12:15:52,376 INFO L226 Difference]: Without dead ends: 108 [2021-08-21 12:15:52,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:15:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-21 12:15:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-21 12:15:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-08-21 12:15:52,378 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-08-21 12:15:52,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:52,378 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-08-21 12:15:52,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-08-21 12:15:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:52,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:52,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:52,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2021-08-21 12:15:52,378 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1637734191, now seen corresponding path program 1 times [2021-08-21 12:15:52,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:52,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876050225] [2021-08-21 12:15:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:52,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:52,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:52,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876050225] [2021-08-21 12:15:52,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876050225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:52,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834969019] [2021-08-21 12:15:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:52,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:52,761 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 12:15:52,762 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 12:15:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:54,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:15:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:15:54,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 58 [2021-08-21 12:15:54,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 116 [2021-08-21 12:15:54,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 94 [2021-08-21 12:15:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:55,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834969019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:55,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:15:55,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:15:55,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236303974] [2021-08-21 12:15:55,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:15:55,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:15:55,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:15:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:15:55,195 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:15:58,159 INFO L93 Difference]: Finished difference Result 351 states and 943 transitions. [2021-08-21 12:15:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:15:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:15:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:15:58,160 INFO L225 Difference]: With dead ends: 351 [2021-08-21 12:15:58,160 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 12:15:58,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2757.0ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:15:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 12:15:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 162. [2021-08-21 12:15:58,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.9130434782608696) internal successors, (469), 161 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 469 transitions. [2021-08-21 12:15:58,162 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 469 transitions. Word has length 17 [2021-08-21 12:15:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:15:58,163 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 469 transitions. [2021-08-21 12:15:58,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:15:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 469 transitions. [2021-08-21 12:15:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:15:58,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:15:58,163 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:15:58,186 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 12:15:58,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 12:15:58,374 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:15:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:15:58,374 INFO L82 PathProgramCache]: Analyzing trace with hash -311332163, now seen corresponding path program 2 times [2021-08-21 12:15:58,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:15:58,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846086372] [2021-08-21 12:15:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:15:58,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:15:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:15:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:15:58,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:15:58,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846086372] [2021-08-21 12:15:58,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846086372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:15:58,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217190872] [2021-08-21 12:15:58,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:15:58,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:15:58,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:15:58,702 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 12:15:58,703 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 12:16:00,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:00,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:00,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:16:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:16:00,611 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 89 treesize of output 73 [2021-08-21 12:16:00,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:16:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:00,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217190872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:00,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:00,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:16:00,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26807712] [2021-08-21 12:16:00,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:00,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:00,726 INFO L87 Difference]: Start difference. First operand 162 states and 469 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 12:16:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:02,133 INFO L93 Difference]: Finished difference Result 263 states and 746 transitions. [2021-08-21 12:16:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:16:02,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:02,133 INFO L225 Difference]: With dead ends: 263 [2021-08-21 12:16:02,133 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 12:16:02,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1206.3ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:16:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 12:16:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 174. [2021-08-21 12:16:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.907514450867052) internal successors, (503), 173 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 503 transitions. [2021-08-21 12:16:02,136 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 503 transitions. Word has length 17 [2021-08-21 12:16:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:02,136 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 503 transitions. [2021-08-21 12:16:02,136 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 12:16:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 503 transitions. [2021-08-21 12:16:02,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:02,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:02,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:02,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 12:16:02,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-21 12:16:02,337 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash -571981107, now seen corresponding path program 3 times [2021-08-21 12:16:02,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:02,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584784074] [2021-08-21 12:16:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:02,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:02,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584784074] [2021-08-21 12:16:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584784074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:02,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592224487] [2021-08-21 12:16:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:02,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:02,614 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 12:16:02,614 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 12:16:04,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:16:04,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:04,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:04,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:04,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:16:04,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-08-21 12:16:04,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2021-08-21 12:16:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:05,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592224487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:05,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:05,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:16:05,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608982003] [2021-08-21 12:16:05,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:05,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:05,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:05,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:05,146 INFO L87 Difference]: Start difference. First operand 174 states and 503 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 12:16:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:06,728 INFO L93 Difference]: Finished difference Result 292 states and 829 transitions. [2021-08-21 12:16:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:16:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:06,729 INFO L225 Difference]: With dead ends: 292 [2021-08-21 12:16:06,729 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:16:06,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1499.2ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:16:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:16:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 176. [2021-08-21 12:16:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8971428571428572) internal successors, (507), 175 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-08-21 12:16:06,732 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-08-21 12:16:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:06,732 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-08-21 12:16:06,732 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 12:16:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-08-21 12:16:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:06,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:06,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:06,754 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 12:16:06,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 12:16:06,933 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:06,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:06,933 INFO L82 PathProgramCache]: Analyzing trace with hash 226523415, now seen corresponding path program 4 times [2021-08-21 12:16:06,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:06,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486459269] [2021-08-21 12:16:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:06,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:07,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486459269] [2021-08-21 12:16:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486459269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550125223] [2021-08-21 12:16:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:07,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:07,264 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 12:16:07,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:16:08,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:08,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:08,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:09,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 58 [2021-08-21 12:16:09,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 116 [2021-08-21 12:16:09,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 94 [2021-08-21 12:16:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550125223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:09,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:09,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:16:09,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056059527] [2021-08-21 12:16:09,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:09,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:09,783 INFO L87 Difference]: Start difference. First operand 176 states and 507 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 12:16:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:11,484 INFO L93 Difference]: Finished difference Result 308 states and 872 transitions. [2021-08-21 12:16:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:16:11,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:11,485 INFO L225 Difference]: With dead ends: 308 [2021-08-21 12:16:11,485 INFO L226 Difference]: Without dead ends: 268 [2021-08-21 12:16:11,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1614.9ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:16:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-21 12:16:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 182. [2021-08-21 12:16:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.889502762430939) internal successors, (523), 181 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 523 transitions. [2021-08-21 12:16:11,487 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 523 transitions. Word has length 17 [2021-08-21 12:16:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:11,487 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 523 transitions. [2021-08-21 12:16:11,487 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 12:16:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 523 transitions. [2021-08-21 12:16:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:11,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:11,488 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:11,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 12:16:11,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:11,688 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash -34125529, now seen corresponding path program 5 times [2021-08-21 12:16:11,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:11,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413988878] [2021-08-21 12:16:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:11,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:11,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:11,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413988878] [2021-08-21 12:16:11,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413988878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:11,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494068784] [2021-08-21 12:16:11,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:11,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:11,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:11,974 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:11,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:16:13,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:16:13,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:13,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:13,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:13,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 68 [2021-08-21 12:16:14,136 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 146 treesize of output 124 [2021-08-21 12:16:14,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 102 [2021-08-21 12:16:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:14,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494068784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:14,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:14,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:16:14,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106408208] [2021-08-21 12:16:14,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:14,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:14,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:14,329 INFO L87 Difference]: Start difference. First operand 182 states and 523 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 12:16:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:15,372 INFO L93 Difference]: Finished difference Result 297 states and 803 transitions. [2021-08-21 12:16:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:16:15,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:15,373 INFO L225 Difference]: With dead ends: 297 [2021-08-21 12:16:15,373 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 12:16:15,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1107.7ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 12:16:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 188. [2021-08-21 12:16:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.8663101604278074) internal successors, (536), 187 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 536 transitions. [2021-08-21 12:16:15,376 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 536 transitions. Word has length 17 [2021-08-21 12:16:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:15,376 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 536 transitions. [2021-08-21 12:16:15,377 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 12:16:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 536 transitions. [2021-08-21 12:16:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:15,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:15,377 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:15,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 12:16:15,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-21 12:16:15,577 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:15,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282833, now seen corresponding path program 6 times [2021-08-21 12:16:15,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:15,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97613259] [2021-08-21 12:16:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:15,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:15,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:15,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97613259] [2021-08-21 12:16:15,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97613259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:15,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279695370] [2021-08-21 12:16:15,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:15,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:15,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:15,819 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:15,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:16:17,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:16:17,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:17,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:17,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 67 [2021-08-21 12:16:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 117 [2021-08-21 12:16:18,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-21 12:16:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:18,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279695370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:18,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:18,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:16:18,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783492606] [2021-08-21 12:16:18,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:18,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:18,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:18,194 INFO L87 Difference]: Start difference. First operand 188 states and 536 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 12:16:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:19,351 INFO L93 Difference]: Finished difference Result 333 states and 896 transitions. [2021-08-21 12:16:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:19,352 INFO L225 Difference]: With dead ends: 333 [2021-08-21 12:16:19,352 INFO L226 Difference]: Without dead ends: 255 [2021-08-21 12:16:19,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1177.2ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:16:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-21 12:16:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 202. [2021-08-21 12:16:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8855721393034828) internal successors, (580), 201 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 580 transitions. [2021-08-21 12:16:19,354 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 580 transitions. Word has length 17 [2021-08-21 12:16:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:19,355 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 580 transitions. [2021-08-21 12:16:19,355 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 12:16:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 580 transitions. [2021-08-21 12:16:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:19,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:19,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:19,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:19,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:19,555 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1769818229, now seen corresponding path program 7 times [2021-08-21 12:16:19,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:19,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873755812] [2021-08-21 12:16:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:19,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:19,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:19,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873755812] [2021-08-21 12:16:19,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873755812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:19,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59908252] [2021-08-21 12:16:19,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:19,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:19,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:19,859 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:19,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:16:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:21,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:16:21,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-08-21 12:16:21,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2021-08-21 12:16:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:22,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59908252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:22,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:22,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:16:22,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965895011] [2021-08-21 12:16:22,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:22,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:22,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:22,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:22,652 INFO L87 Difference]: Start difference. First operand 202 states and 580 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 12:16:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:23,736 INFO L93 Difference]: Finished difference Result 295 states and 843 transitions. [2021-08-21 12:16:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:16:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:23,737 INFO L225 Difference]: With dead ends: 295 [2021-08-21 12:16:23,737 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 12:16:23,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1125.8ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 12:16:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 203. [2021-08-21 12:16:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-08-21 12:16:23,740 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-08-21 12:16:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:23,740 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-08-21 12:16:23,740 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 12:16:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-08-21 12:16:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:23,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:23,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:23,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 12:16:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-21 12:16:23,941 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1208991763, now seen corresponding path program 8 times [2021-08-21 12:16:23,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:23,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330327571] [2021-08-21 12:16:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:23,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:24,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:24,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330327571] [2021-08-21 12:16:24,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330327571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:24,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652302719] [2021-08-21 12:16:24,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:24,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:24,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:24,244 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:24,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:16:26,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:26,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:26,377 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 81 treesize of output 67 [2021-08-21 12:16:26,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2021-08-21 12:16:26,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2021-08-21 12:16:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:26,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652302719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:26,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:26,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:16:26,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236634537] [2021-08-21 12:16:26,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:26,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:26,720 INFO L87 Difference]: Start difference. First operand 203 states and 585 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 12:16:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:27,656 INFO L93 Difference]: Finished difference Result 326 states and 900 transitions. [2021-08-21 12:16:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:27,657 INFO L225 Difference]: With dead ends: 326 [2021-08-21 12:16:27,657 INFO L226 Difference]: Without dead ends: 262 [2021-08-21 12:16:27,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 932.1ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:16:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-21 12:16:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 191. [2021-08-21 12:16:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9473684210526314) internal successors, (560), 190 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 560 transitions. [2021-08-21 12:16:27,660 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 560 transitions. Word has length 17 [2021-08-21 12:16:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:27,660 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 560 transitions. [2021-08-21 12:16:27,660 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 12:16:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 560 transitions. [2021-08-21 12:16:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:27,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:27,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:27,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 12:16:27,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-08-21 12:16:27,861 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash 193673455, now seen corresponding path program 9 times [2021-08-21 12:16:27,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:27,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595939575] [2021-08-21 12:16:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:27,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:28,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:28,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595939575] [2021-08-21 12:16:28,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595939575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:28,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098905097] [2021-08-21 12:16:28,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:28,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:28,336 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:28,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:16:30,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:16:30,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:30,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:30,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:30,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-08-21 12:16:30,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2021-08-21 12:16:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2021-08-21 12:16:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:30,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098905097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:30,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:30,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:16:30,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854913872] [2021-08-21 12:16:30,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:30,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:30,976 INFO L87 Difference]: Start difference. First operand 191 states and 560 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 12:16:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:32,443 INFO L93 Difference]: Finished difference Result 329 states and 908 transitions. [2021-08-21 12:16:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:16:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:32,444 INFO L225 Difference]: With dead ends: 329 [2021-08-21 12:16:32,444 INFO L226 Difference]: Without dead ends: 313 [2021-08-21 12:16:32,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1561.4ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:16:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-21 12:16:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 221. [2021-08-21 12:16:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.0136363636363637) internal successors, (663), 220 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 663 transitions. [2021-08-21 12:16:32,447 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 663 transitions. Word has length 17 [2021-08-21 12:16:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:32,447 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 663 transitions. [2021-08-21 12:16:32,448 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 12:16:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 663 transitions. [2021-08-21 12:16:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:32,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:32,448 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:32,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:32,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-08-21 12:16:32,648 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1225907309, now seen corresponding path program 10 times [2021-08-21 12:16:32,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:32,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623331251] [2021-08-21 12:16:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:32,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:33,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:33,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623331251] [2021-08-21 12:16:33,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623331251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:33,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145981667] [2021-08-21 12:16:33,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:33,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:33,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:33,123 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:33,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:16:35,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:35,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:35,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:16:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-08-21 12:16:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:16:35,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-08-21 12:16:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:35,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145981667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:35,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:35,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:16:35,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236705976] [2021-08-21 12:16:35,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:35,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:35,479 INFO L87 Difference]: Start difference. First operand 221 states and 663 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 12:16:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:36,715 INFO L93 Difference]: Finished difference Result 314 states and 899 transitions. [2021-08-21 12:16:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:16:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:36,717 INFO L225 Difference]: With dead ends: 314 [2021-08-21 12:16:36,717 INFO L226 Difference]: Without dead ends: 300 [2021-08-21 12:16:36,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1201.5ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:16:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-21 12:16:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 216. [2021-08-21 12:16:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9953488372093022) internal successors, (644), 215 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 12:16:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 644 transitions. [2021-08-21 12:16:36,721 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 644 transitions. Word has length 17 [2021-08-21 12:16:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:36,721 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 644 transitions. [2021-08-21 12:16:36,721 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 12:16:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 644 transitions. [2021-08-21 12:16:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:36,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:36,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:36,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:36,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-21 12:16:36,922 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1497232907, now seen corresponding path program 11 times [2021-08-21 12:16:36,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:36,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057541392] [2021-08-21 12:16:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:36,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:37,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:37,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057541392] [2021-08-21 12:16:37,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057541392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:37,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30978836] [2021-08-21 12:16:37,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:16:37,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:37,243 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:37,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:16:39,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:39,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:39,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 68 [2021-08-21 12:16:39,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 107 [2021-08-21 12:16:39,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 87 [2021-08-21 12:16:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:39,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30978836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:39,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:39,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:16:39,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627104708] [2021-08-21 12:16:39,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:39,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:39,932 INFO L87 Difference]: Start difference. First operand 216 states and 644 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 12:16:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:40,925 INFO L93 Difference]: Finished difference Result 434 states and 1248 transitions. [2021-08-21 12:16:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:16:40,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:40,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:40,927 INFO L225 Difference]: With dead ends: 434 [2021-08-21 12:16:40,927 INFO L226 Difference]: Without dead ends: 405 [2021-08-21 12:16:40,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 995.6ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:16:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-21 12:16:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 249. [2021-08-21 12:16:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.0161290322580645) internal successors, (748), 248 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 748 transitions. [2021-08-21 12:16:40,930 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 748 transitions. Word has length 17 [2021-08-21 12:16:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:40,930 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 748 transitions. [2021-08-21 12:16:40,930 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 12:16:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 748 transitions. [2021-08-21 12:16:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:40,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:40,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:40,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:41,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 12:16:41,131 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash 848668035, now seen corresponding path program 12 times [2021-08-21 12:16:41,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:41,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256886596] [2021-08-21 12:16:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:41,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:41,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:41,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256886596] [2021-08-21 12:16:41,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256886596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:41,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250272604] [2021-08-21 12:16:41,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:16:41,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:41,513 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:41,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:16:43,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:16:43,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:43,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:43,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:43,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 71 [2021-08-21 12:16:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 84 [2021-08-21 12:16:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2021-08-21 12:16:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:44,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250272604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:44,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:44,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:16:44,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117683877] [2021-08-21 12:16:44,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:44,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:44,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:44,189 INFO L87 Difference]: Start difference. First operand 249 states and 748 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 12:16:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:45,038 INFO L93 Difference]: Finished difference Result 294 states and 868 transitions. [2021-08-21 12:16:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:45,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:45,039 INFO L225 Difference]: With dead ends: 294 [2021-08-21 12:16:45,039 INFO L226 Difference]: Without dead ends: 284 [2021-08-21 12:16:45,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 910.4ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:16:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-21 12:16:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 251. [2021-08-21 12:16:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 3.012) internal successors, (753), 250 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 753 transitions. [2021-08-21 12:16:45,042 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 753 transitions. Word has length 17 [2021-08-21 12:16:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:45,043 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 753 transitions. [2021-08-21 12:16:45,043 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 12:16:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 753 transitions. [2021-08-21 12:16:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:45,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:45,043 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:45,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:45,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:45,244 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash 588019091, now seen corresponding path program 13 times [2021-08-21 12:16:45,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:45,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025665001] [2021-08-21 12:16:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:45,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:45,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:45,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025665001] [2021-08-21 12:16:45,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025665001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:45,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89843626] [2021-08-21 12:16:45,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:16:45,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:45,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:45,537 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:45,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:16:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:47,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:47,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 71 [2021-08-21 12:16:48,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 106 [2021-08-21 12:16:48,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 86 [2021-08-21 12:16:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:48,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89843626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:48,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:48,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:16:48,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255455689] [2021-08-21 12:16:48,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:48,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:48,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:48,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:48,209 INFO L87 Difference]: Start difference. First operand 251 states and 753 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 12:16:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:48,843 INFO L93 Difference]: Finished difference Result 293 states and 864 transitions. [2021-08-21 12:16:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:48,844 INFO L225 Difference]: With dead ends: 293 [2021-08-21 12:16:48,844 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 12:16:48,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 738.0ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 12:16:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 255. [2021-08-21 12:16:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9960629921259843) internal successors, (761), 254 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 761 transitions. [2021-08-21 12:16:48,847 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 761 transitions. Word has length 17 [2021-08-21 12:16:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:48,847 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 761 transitions. [2021-08-21 12:16:48,848 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 12:16:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 761 transitions. [2021-08-21 12:16:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:48,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:48,848 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:48,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 12:16:49,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 12:16:49,048 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -177153377, now seen corresponding path program 14 times [2021-08-21 12:16:49,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:49,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031778669] [2021-08-21 12:16:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:49,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:49,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:49,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031778669] [2021-08-21 12:16:49,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031778669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:49,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843115495] [2021-08-21 12:16:49,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:16:49,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:49,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:49,502 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:49,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:16:51,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:16:51,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:16:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:51,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:16:51,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2021-08-21 12:16:51,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:16:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:52,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843115495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:52,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:52,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:16:52,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287632001] [2021-08-21 12:16:52,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:16:52,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:16:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:16:52,019 INFO L87 Difference]: Start difference. First operand 255 states and 761 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 12:16:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:52,480 INFO L93 Difference]: Finished difference Result 340 states and 1000 transitions. [2021-08-21 12:16:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:52,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:52,481 INFO L225 Difference]: With dead ends: 340 [2021-08-21 12:16:52,481 INFO L226 Difference]: Without dead ends: 324 [2021-08-21 12:16:52,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:16:52,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-08-21 12:16:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 261. [2021-08-21 12:16:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.996153846153846) internal successors, (779), 260 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 779 transitions. [2021-08-21 12:16:52,485 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 779 transitions. Word has length 17 [2021-08-21 12:16:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:52,485 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 779 transitions. [2021-08-21 12:16:52,485 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 12:16:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 779 transitions. [2021-08-21 12:16:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:52,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:52,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:52,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:52,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 12:16:52,686 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -437802321, now seen corresponding path program 15 times [2021-08-21 12:16:52,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:52,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802586576] [2021-08-21 12:16:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:52,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:53,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:53,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802586576] [2021-08-21 12:16:53,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802586576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:53,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284980854] [2021-08-21 12:16:53,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:16:53,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:53,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:53,002 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:53,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:16:55,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:16:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:55,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:16:55,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:55,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:16:55,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:16:55,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-08-21 12:16:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:55,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284980854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:55,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:55,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:16:55,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652422373] [2021-08-21 12:16:55,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:16:55,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:16:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:16:55,531 INFO L87 Difference]: Start difference. First operand 261 states and 779 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:16:56,071 INFO L93 Difference]: Finished difference Result 333 states and 979 transitions. [2021-08-21 12:16:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:16:56,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:16:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:16:56,072 INFO L225 Difference]: With dead ends: 333 [2021-08-21 12:16:56,072 INFO L226 Difference]: Without dead ends: 320 [2021-08-21 12:16:56,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:16:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-21 12:16:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 266. [2021-08-21 12:16:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0226415094339623) internal successors, (801), 265 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 12:16:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 801 transitions. [2021-08-21 12:16:56,076 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 801 transitions. Word has length 17 [2021-08-21 12:16:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:16:56,076 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 801 transitions. [2021-08-21 12:16:56,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:16:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 801 transitions. [2021-08-21 12:16:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:16:56,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:16:56,076 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:16:56,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 12:16:56,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-21 12:16:56,300 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:16:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:16:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1308007629, now seen corresponding path program 16 times [2021-08-21 12:16:56,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:16:56,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847355497] [2021-08-21 12:16:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:16:56,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:16:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:16:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:56,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:16:56,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847355497] [2021-08-21 12:16:56,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847355497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:56,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513730962] [2021-08-21 12:16:56,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:16:56,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:16:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:16:56,713 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:16:56,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:16:58,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:16:58,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:16:58,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:16:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:16:59,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-08-21 12:16:59,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 84 [2021-08-21 12:16:59,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2021-08-21 12:16:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:16:59,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513730962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:16:59,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:16:59,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:16:59,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856331124] [2021-08-21 12:16:59,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:16:59,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:16:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:16:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:16:59,618 INFO L87 Difference]: Start difference. First operand 266 states and 801 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 12:17:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:01,131 INFO L93 Difference]: Finished difference Result 436 states and 1237 transitions. [2021-08-21 12:17:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:17:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:01,132 INFO L225 Difference]: With dead ends: 436 [2021-08-21 12:17:01,132 INFO L226 Difference]: Without dead ends: 398 [2021-08-21 12:17:01,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1550.6ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:17:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-21 12:17:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 301. [2021-08-21 12:17:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.12) internal successors, (936), 300 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 936 transitions. [2021-08-21 12:17:01,137 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 936 transitions. Word has length 17 [2021-08-21 12:17:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:01,137 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 936 transitions. [2021-08-21 12:17:01,137 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 12:17:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 936 transitions. [2021-08-21 12:17:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:01,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:01,137 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:01,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 12:17:01,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:01,345 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash 626655673, now seen corresponding path program 17 times [2021-08-21 12:17:01,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:01,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139470692] [2021-08-21 12:17:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:01,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:01,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:01,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139470692] [2021-08-21 12:17:01,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139470692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:01,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077399] [2021-08-21 12:17:01,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:01,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:01,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:01,764 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:01,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:17:03,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:17:03,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:04,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-08-21 12:17:04,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 116 [2021-08-21 12:17:04,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 94 [2021-08-21 12:17:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:04,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:04,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:04,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:17:04,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294538040] [2021-08-21 12:17:04,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:04,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:04,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:04,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:04,830 INFO L87 Difference]: Start difference. First operand 301 states and 936 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 12:17:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:05,678 INFO L93 Difference]: Finished difference Result 368 states and 1084 transitions. [2021-08-21 12:17:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:17:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:05,679 INFO L225 Difference]: With dead ends: 368 [2021-08-21 12:17:05,679 INFO L226 Difference]: Without dead ends: 352 [2021-08-21 12:17:05,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 947.6ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:17:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-08-21 12:17:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 298. [2021-08-21 12:17:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1144781144781146) internal successors, (925), 297 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 12:17:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 925 transitions. [2021-08-21 12:17:05,683 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 925 transitions. Word has length 17 [2021-08-21 12:17:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:05,683 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 925 transitions. [2021-08-21 12:17:05,683 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 12:17:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 925 transitions. [2021-08-21 12:17:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:05,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:05,683 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 12:17:05,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-21 12:17:05,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:05,887 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2025861353, now seen corresponding path program 18 times [2021-08-21 12:17:05,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:05,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845339035] [2021-08-21 12:17:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:05,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:06,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:06,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845339035] [2021-08-21 12:17:06,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845339035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:06,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250048958] [2021-08-21 12:17:06,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:06,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:06,341 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:06,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:17:08,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:17:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:17:08,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:08,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:17:08,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2021-08-21 12:17:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:17:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:09,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250048958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:09,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:09,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:17:09,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592475127] [2021-08-21 12:17:09,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:09,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:09,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:09,010 INFO L87 Difference]: Start difference. First operand 298 states and 925 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 12:17:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:09,680 INFO L93 Difference]: Finished difference Result 344 states and 1051 transitions. [2021-08-21 12:17:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:17:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:09,681 INFO L225 Difference]: With dead ends: 344 [2021-08-21 12:17:09,681 INFO L226 Difference]: Without dead ends: 334 [2021-08-21 12:17:09,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:17:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-21 12:17:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 305. [2021-08-21 12:17:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1315789473684212) internal successors, (952), 304 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 952 transitions. [2021-08-21 12:17:09,685 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 952 transitions. Word has length 17 [2021-08-21 12:17:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:09,685 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 952 transitions. [2021-08-21 12:17:09,685 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 12:17:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 952 transitions. [2021-08-21 12:17:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:09,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:09,686 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 12:17:09,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:09,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-21 12:17:09,886 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash -290855849, now seen corresponding path program 19 times [2021-08-21 12:17:09,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:09,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697031822] [2021-08-21 12:17:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:09,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:10,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:10,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697031822] [2021-08-21 12:17:10,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697031822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:10,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624285150] [2021-08-21 12:17:10,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:10,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:10,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:10,290 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:10,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:17:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:12,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:17:12,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:12,765 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 68 treesize of output 56 [2021-08-21 12:17:12,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 112 [2021-08-21 12:17:12,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 90 [2021-08-21 12:17:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:13,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624285150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:13,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:13,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 12:17:13,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560743656] [2021-08-21 12:17:13,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:17:13,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:13,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:17:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:13,388 INFO L87 Difference]: Start difference. First operand 305 states and 952 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:14,197 INFO L93 Difference]: Finished difference Result 366 states and 1128 transitions. [2021-08-21 12:17:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:17:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:14,198 INFO L225 Difference]: With dead ends: 366 [2021-08-21 12:17:14,198 INFO L226 Difference]: Without dead ends: 355 [2021-08-21 12:17:14,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 914.5ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:17:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-21 12:17:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 320. [2021-08-21 12:17:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.1442006269592477) internal successors, (1003), 319 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1003 transitions. [2021-08-21 12:17:14,203 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1003 transitions. Word has length 17 [2021-08-21 12:17:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:14,203 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1003 transitions. [2021-08-21 12:17:14,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1003 transitions. [2021-08-21 12:17:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:14,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:14,203 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 12:17:14,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:14,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:14,429 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:14,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1062951657, now seen corresponding path program 20 times [2021-08-21 12:17:14,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:14,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604468457] [2021-08-21 12:17:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:14,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:14,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:14,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604468457] [2021-08-21 12:17:14,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604468457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:14,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970681310] [2021-08-21 12:17:14,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:14,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:14,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:14,937 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:14,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:17:17,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:17,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:17:17,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:17,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:17:17,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2021-08-21 12:17:17,581 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 73 treesize of output 57 [2021-08-21 12:17:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:17,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970681310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:17,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:17,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:17:17,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524758243] [2021-08-21 12:17:17,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:17,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:17,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:17,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:17,681 INFO L87 Difference]: Start difference. First operand 320 states and 1003 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 12:17:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:17,975 INFO L93 Difference]: Finished difference Result 372 states and 1147 transitions. [2021-08-21 12:17:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:17:17,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:17,976 INFO L225 Difference]: With dead ends: 372 [2021-08-21 12:17:17,976 INFO L226 Difference]: Without dead ends: 362 [2021-08-21 12:17:17,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:17:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-21 12:17:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 324. [2021-08-21 12:17:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.1424148606811144) internal successors, (1015), 323 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 1015 transitions. [2021-08-21 12:17:17,980 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 1015 transitions. Word has length 17 [2021-08-21 12:17:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:17,980 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 1015 transitions. [2021-08-21 12:17:17,980 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 12:17:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 1015 transitions. [2021-08-21 12:17:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:17,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:17,981 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 12:17:18,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-21 12:17:18,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-08-21 12:17:18,181 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:18,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1323600601, now seen corresponding path program 21 times [2021-08-21 12:17:18,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:18,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727575128] [2021-08-21 12:17:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:18,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:18,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:18,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727575128] [2021-08-21 12:17:18,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727575128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:18,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321250101] [2021-08-21 12:17:18,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:18,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:18,555 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:18,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:17:20,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:17:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:17:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:21,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 76 [2021-08-21 12:17:21,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 106 [2021-08-21 12:17:21,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 86 [2021-08-21 12:17:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:21,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321250101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:21,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:21,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:17:21,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022573462] [2021-08-21 12:17:21,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:21,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:21,584 INFO L87 Difference]: Start difference. First operand 324 states and 1015 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 12:17:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:21,893 INFO L93 Difference]: Finished difference Result 343 states and 1060 transitions. [2021-08-21 12:17:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:17:21,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:21,894 INFO L225 Difference]: With dead ends: 343 [2021-08-21 12:17:21,894 INFO L226 Difference]: Without dead ends: 339 [2021-08-21 12:17:21,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:17:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-21 12:17:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 325. [2021-08-21 12:17:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.1450617283950617) internal successors, (1019), 324 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1019 transitions. [2021-08-21 12:17:21,897 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1019 transitions. Word has length 17 [2021-08-21 12:17:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:21,897 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 1019 transitions. [2021-08-21 12:17:21,898 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 12:17:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1019 transitions. [2021-08-21 12:17:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:21,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:21,898 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:21,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:22,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:22,099 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1910542133, now seen corresponding path program 22 times [2021-08-21 12:17:22,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:22,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447644232] [2021-08-21 12:17:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:22,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:22,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:22,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447644232] [2021-08-21 12:17:22,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447644232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:22,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065575056] [2021-08-21 12:17:22,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:22,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:22,373 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:22,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:17:24,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:24,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:17:24,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:17:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:17:25,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-08-21 12:17:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065575056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:25,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:25,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:17:25,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833313337] [2021-08-21 12:17:25,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:25,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:25,158 INFO L87 Difference]: Start difference. First operand 325 states and 1019 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:25,476 INFO L93 Difference]: Finished difference Result 381 states and 1170 transitions. [2021-08-21 12:17:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:17:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:25,477 INFO L225 Difference]: With dead ends: 381 [2021-08-21 12:17:25,477 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 12:17:25,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:17:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 12:17:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 325. [2021-08-21 12:17:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.1450617283950617) internal successors, (1019), 324 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1019 transitions. [2021-08-21 12:17:25,481 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1019 transitions. Word has length 17 [2021-08-21 12:17:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:25,481 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 1019 transitions. [2021-08-21 12:17:25,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1019 transitions. [2021-08-21 12:17:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:25,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:25,482 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 12:17:25,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:25,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 12:17:25,682 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash 967202623, now seen corresponding path program 23 times [2021-08-21 12:17:25,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:25,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162346510] [2021-08-21 12:17:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:25,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:26,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:26,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162346510] [2021-08-21 12:17:26,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162346510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:26,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959382910] [2021-08-21 12:17:26,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:26,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:26,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:26,081 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:26,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:17:28,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:17:28,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:17:28,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:28,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:17:28,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2021-08-21 12:17:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:17:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:28,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959382910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:28,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:28,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:17:28,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244286693] [2021-08-21 12:17:28,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:28,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:28,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:28,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:28,920 INFO L87 Difference]: Start difference. First operand 325 states and 1019 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 12:17:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:29,474 INFO L93 Difference]: Finished difference Result 367 states and 1133 transitions. [2021-08-21 12:17:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:17:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:29,475 INFO L225 Difference]: With dead ends: 367 [2021-08-21 12:17:29,475 INFO L226 Difference]: Without dead ends: 357 [2021-08-21 12:17:29,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-21 12:17:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 327. [2021-08-21 12:17:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.144171779141104) internal successors, (1025), 326 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 1025 transitions. [2021-08-21 12:17:29,479 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 1025 transitions. Word has length 17 [2021-08-21 12:17:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:29,479 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 1025 transitions. [2021-08-21 12:17:29,479 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 12:17:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 1025 transitions. [2021-08-21 12:17:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:29,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:29,480 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:29,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:29,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 12:17:29,680 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1960774453, now seen corresponding path program 24 times [2021-08-21 12:17:29,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:29,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834569566] [2021-08-21 12:17:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:29,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:30,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:30,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834569566] [2021-08-21 12:17:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834569566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:30,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217022447] [2021-08-21 12:17:30,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:30,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:30,222 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:30,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:17:32,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:17:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:17:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:32,914 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 68 treesize of output 56 [2021-08-21 12:17:33,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 112 [2021-08-21 12:17:33,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 90 [2021-08-21 12:17:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:33,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217022447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:33,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:33,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:17:33,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344391775] [2021-08-21 12:17:33,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:33,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:33,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:33,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:33,471 INFO L87 Difference]: Start difference. First operand 327 states and 1025 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 12:17:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:34,199 INFO L93 Difference]: Finished difference Result 384 states and 1163 transitions. [2021-08-21 12:17:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:34,200 INFO L225 Difference]: With dead ends: 384 [2021-08-21 12:17:34,200 INFO L226 Difference]: Without dead ends: 362 [2021-08-21 12:17:34,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-21 12:17:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 328. [2021-08-21 12:17:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.149847094801223) internal successors, (1030), 327 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1030 transitions. [2021-08-21 12:17:34,204 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1030 transitions. Word has length 17 [2021-08-21 12:17:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:34,204 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1030 transitions. [2021-08-21 12:17:34,204 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 12:17:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1030 transitions. [2021-08-21 12:17:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:34,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:34,205 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 12:17:34,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 12:17:34,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 12:17:34,406 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1322796811, now seen corresponding path program 25 times [2021-08-21 12:17:34,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:34,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230689576] [2021-08-21 12:17:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:34,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:34,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:34,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230689576] [2021-08-21 12:17:34,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230689576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:34,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568455053] [2021-08-21 12:17:34,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:17:34,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:34,821 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:34,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:17:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:17:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:37,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:17:37,607 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 88 treesize of output 72 [2021-08-21 12:17:37,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-08-21 12:17:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568455053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:37,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:37,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:17:37,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962412054] [2021-08-21 12:17:37,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:17:37,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:17:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:17:37,743 INFO L87 Difference]: Start difference. First operand 328 states and 1030 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:38,273 INFO L93 Difference]: Finished difference Result 369 states and 1142 transitions. [2021-08-21 12:17:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:17:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:38,274 INFO L225 Difference]: With dead ends: 369 [2021-08-21 12:17:38,274 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 12:17:38,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 561.0ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:17:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 12:17:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 332. [2021-08-21 12:17:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.1540785498489425) internal successors, (1044), 331 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1044 transitions. [2021-08-21 12:17:38,278 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1044 transitions. Word has length 17 [2021-08-21 12:17:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:38,279 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1044 transitions. [2021-08-21 12:17:38,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1044 transitions. [2021-08-21 12:17:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:38,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:38,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:38,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 12:17:38,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:38,480 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:38,480 INFO L82 PathProgramCache]: Analyzing trace with hash -980213299, now seen corresponding path program 26 times [2021-08-21 12:17:38,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:38,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038437420] [2021-08-21 12:17:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:38,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:38,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:38,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038437420] [2021-08-21 12:17:38,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038437420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:38,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32619819] [2021-08-21 12:17:38,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:17:38,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:38,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:38,862 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:38,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:17:41,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:17:41,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:17:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:41,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:17:41,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 137 [2021-08-21 12:17:41,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 111 [2021-08-21 12:17:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:42,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32619819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:42,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:42,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-21 12:17:42,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22126382] [2021-08-21 12:17:42,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:42,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:42,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:42,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:42,632 INFO L87 Difference]: Start difference. First operand 332 states and 1044 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 12:17:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:43,215 INFO L93 Difference]: Finished difference Result 369 states and 1144 transitions. [2021-08-21 12:17:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:17:43,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:43,216 INFO L225 Difference]: With dead ends: 369 [2021-08-21 12:17:43,217 INFO L226 Difference]: Without dead ends: 358 [2021-08-21 12:17:43,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:17:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-21 12:17:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 332. [2021-08-21 12:17:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.1540785498489425) internal successors, (1044), 331 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1044 transitions. [2021-08-21 12:17:43,220 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1044 transitions. Word has length 17 [2021-08-21 12:17:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:43,220 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 1044 transitions. [2021-08-21 12:17:43,221 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 12:17:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1044 transitions. [2021-08-21 12:17:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:43,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:43,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:43,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:43,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:43,422 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:43,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1095855107, now seen corresponding path program 27 times [2021-08-21 12:17:43,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:43,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454018651] [2021-08-21 12:17:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:43,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:43,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:43,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454018651] [2021-08-21 12:17:43,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454018651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:43,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237867824] [2021-08-21 12:17:43,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:17:43,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:43,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:43,829 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:43,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:17:46,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:17:46,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:46,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:17:46,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:46,765 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 85 treesize of output 71 [2021-08-21 12:17:46,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 84 [2021-08-21 12:17:46,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 68 [2021-08-21 12:17:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237867824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:47,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:47,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:17:47,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097937027] [2021-08-21 12:17:47,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:17:47,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:47,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:17:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:17:47,115 INFO L87 Difference]: Start difference. First operand 332 states and 1044 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 12:17:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:48,069 INFO L93 Difference]: Finished difference Result 393 states and 1207 transitions. [2021-08-21 12:17:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:48,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:48,070 INFO L225 Difference]: With dead ends: 393 [2021-08-21 12:17:48,070 INFO L226 Difference]: Without dead ends: 387 [2021-08-21 12:17:48,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1070.6ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:17:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-08-21 12:17:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 334. [2021-08-21 12:17:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.156156156156156) internal successors, (1051), 333 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1051 transitions. [2021-08-21 12:17:48,074 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1051 transitions. Word has length 17 [2021-08-21 12:17:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:48,074 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 1051 transitions. [2021-08-21 12:17:48,074 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 12:17:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1051 transitions. [2021-08-21 12:17:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:48,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:48,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:48,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 12:17:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-08-21 12:17:48,275 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash 835206163, now seen corresponding path program 28 times [2021-08-21 12:17:48,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:48,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551707360] [2021-08-21 12:17:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:48,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:48,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:48,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551707360] [2021-08-21 12:17:48,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551707360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:48,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303917192] [2021-08-21 12:17:48,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:17:48,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:48,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:48,518 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:48,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 12:17:51,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:17:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:51,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:17:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:51,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 71 [2021-08-21 12:17:51,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 113 [2021-08-21 12:17:51,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2021-08-21 12:17:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:51,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303917192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:51,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:51,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:17:51,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648037741] [2021-08-21 12:17:51,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:51,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:51,834 INFO L87 Difference]: Start difference. First operand 334 states and 1051 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 12:17:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:52,434 INFO L93 Difference]: Finished difference Result 394 states and 1212 transitions. [2021-08-21 12:17:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:52,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:52,435 INFO L225 Difference]: With dead ends: 394 [2021-08-21 12:17:52,435 INFO L226 Difference]: Without dead ends: 386 [2021-08-21 12:17:52,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 643.5ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:17:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-21 12:17:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2021-08-21 12:17:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.148367952522255) internal successors, (1061), 337 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1061 transitions. [2021-08-21 12:17:52,439 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1061 transitions. Word has length 17 [2021-08-21 12:17:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:52,440 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1061 transitions. [2021-08-21 12:17:52,440 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 12:17:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1061 transitions. [2021-08-21 12:17:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:52,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:52,440 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 12:17:52,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-21 12:17:52,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-21 12:17:52,641 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:52,641 INFO L82 PathProgramCache]: Analyzing trace with hash -480951141, now seen corresponding path program 29 times [2021-08-21 12:17:52,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:52,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402743888] [2021-08-21 12:17:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:52,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:52,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:52,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402743888] [2021-08-21 12:17:52,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402743888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:52,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675992240] [2021-08-21 12:17:52,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:17:52,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:52,923 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:52,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 12:17:55,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:17:55,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:17:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:17:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:17:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 67 [2021-08-21 12:17:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 117 [2021-08-21 12:17:56,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-21 12:17:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:56,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675992240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:56,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:17:56,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:17:56,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583228068] [2021-08-21 12:17:56,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:17:56,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:17:56,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:17:56,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:17:56,241 INFO L87 Difference]: Start difference. First operand 338 states and 1061 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 12:17:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:17:57,051 INFO L93 Difference]: Finished difference Result 447 states and 1350 transitions. [2021-08-21 12:17:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:17:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:17:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:17:57,052 INFO L225 Difference]: With dead ends: 447 [2021-08-21 12:17:57,052 INFO L226 Difference]: Without dead ends: 437 [2021-08-21 12:17:57,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 839.1ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:17:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-21 12:17:57,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 338. [2021-08-21 12:17:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.148367952522255) internal successors, (1061), 337 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:17:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1061 transitions. [2021-08-21 12:17:57,056 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1061 transitions. Word has length 17 [2021-08-21 12:17:57,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:17:57,057 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1061 transitions. [2021-08-21 12:17:57,057 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 12:17:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1061 transitions. [2021-08-21 12:17:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:17:57,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:17:57,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:17:57,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-21 12:17:57,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:57,258 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:17:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:17:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash 38524383, now seen corresponding path program 30 times [2021-08-21 12:17:57,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:17:57,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315709204] [2021-08-21 12:17:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:17:57,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:17:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:17:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:17:57,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:17:57,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315709204] [2021-08-21 12:17:57,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315709204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:17:57,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721563448] [2021-08-21 12:17:57,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:17:57,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:17:57,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:17:57,734 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:17:57,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 12:18:00,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:18:00,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:00,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:18:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:00,624 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 63 treesize of output 51 [2021-08-21 12:18:00,753 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 89 treesize of output 73 [2021-08-21 12:18:00,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:18:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721563448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:00,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:00,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:18:00,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432530938] [2021-08-21 12:18:00,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:00,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:00,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:00,843 INFO L87 Difference]: Start difference. First operand 338 states and 1061 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 12:18:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:01,410 INFO L93 Difference]: Finished difference Result 438 states and 1337 transitions. [2021-08-21 12:18:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:18:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:01,411 INFO L225 Difference]: With dead ends: 438 [2021-08-21 12:18:01,411 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 12:18:01,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 670.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:18:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 12:18:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 339. [2021-08-21 12:18:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1508875739644973) internal successors, (1065), 338 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1065 transitions. [2021-08-21 12:18:01,416 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1065 transitions. Word has length 17 [2021-08-21 12:18:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:01,416 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1065 transitions. [2021-08-21 12:18:01,416 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 12:18:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1065 transitions. [2021-08-21 12:18:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:01,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:01,416 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:01,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 12:18:01,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:01,625 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:01,625 INFO L82 PathProgramCache]: Analyzing trace with hash -222124561, now seen corresponding path program 31 times [2021-08-21 12:18:01,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:01,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603587193] [2021-08-21 12:18:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:01,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:01,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:01,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603587193] [2021-08-21 12:18:01,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603587193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:01,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156070008] [2021-08-21 12:18:01,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:01,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:01,914 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:01,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 12:18:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:18:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 71 [2021-08-21 12:18:05,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 106 [2021-08-21 12:18:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 86 [2021-08-21 12:18:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:05,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156070008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:05,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:05,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:18:05,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783431374] [2021-08-21 12:18:05,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:05,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:05,373 INFO L87 Difference]: Start difference. First operand 339 states and 1065 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 12:18:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:05,831 INFO L93 Difference]: Finished difference Result 433 states and 1318 transitions. [2021-08-21 12:18:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:18:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:05,832 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:18:05,832 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 12:18:05,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:18:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 12:18:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 341. [2021-08-21 12:18:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.152941176470588) internal successors, (1072), 340 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1072 transitions. [2021-08-21 12:18:05,836 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1072 transitions. Word has length 17 [2021-08-21 12:18:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:05,836 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1072 transitions. [2021-08-21 12:18:05,837 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 12:18:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1072 transitions. [2021-08-21 12:18:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:05,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:05,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:05,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-21 12:18:06,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:06,038 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:06,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269449, now seen corresponding path program 32 times [2021-08-21 12:18:06,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:06,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902208142] [2021-08-21 12:18:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:06,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:06,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:06,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902208142] [2021-08-21 12:18:06,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902208142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:06,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252007887] [2021-08-21 12:18:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:06,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:06,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:06,388 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:06,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 12:18:09,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:18:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-08-21 12:18:09,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 106 [2021-08-21 12:18:09,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 86 [2021-08-21 12:18:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:10,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252007887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:10,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:10,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:18:10,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359143158] [2021-08-21 12:18:10,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:10,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:10,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:10,017 INFO L87 Difference]: Start difference. First operand 341 states and 1072 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 12:18:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:11,349 INFO L93 Difference]: Finished difference Result 584 states and 1727 transitions. [2021-08-21 12:18:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:18:11,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:11,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:11,350 INFO L225 Difference]: With dead ends: 584 [2021-08-21 12:18:11,350 INFO L226 Difference]: Without dead ends: 556 [2021-08-21 12:18:11,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1357.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:18:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-08-21 12:18:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 379. [2021-08-21 12:18:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.259259259259259) internal successors, (1232), 378 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1232 transitions. [2021-08-21 12:18:11,356 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1232 transitions. Word has length 17 [2021-08-21 12:18:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:11,356 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1232 transitions. [2021-08-21 12:18:11,356 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 12:18:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1232 transitions. [2021-08-21 12:18:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:11,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:11,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:11,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:11,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:11,557 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1379117083, now seen corresponding path program 33 times [2021-08-21 12:18:11,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:11,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138243064] [2021-08-21 12:18:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:11,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:11,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:11,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138243064] [2021-08-21 12:18:11,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138243064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:11,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796717160] [2021-08-21 12:18:11,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:11,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:11,999 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:12,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 12:18:14,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:18:14,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:14,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:18:14,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:14,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-08-21 12:18:15,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:18:15,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-08-21 12:18:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:15,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796717160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:15,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:15,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:18:15,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610824587] [2021-08-21 12:18:15,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:15,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:15,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:15,277 INFO L87 Difference]: Start difference. First operand 379 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:16,314 INFO L93 Difference]: Finished difference Result 516 states and 1589 transitions. [2021-08-21 12:18:16,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:18:16,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:16,315 INFO L225 Difference]: With dead ends: 516 [2021-08-21 12:18:16,315 INFO L226 Difference]: Without dead ends: 502 [2021-08-21 12:18:16,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 967.6ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:18:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-21 12:18:16,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 374. [2021-08-21 12:18:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.260053619302949) internal successors, (1216), 373 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1216 transitions. [2021-08-21 12:18:16,320 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1216 transitions. Word has length 17 [2021-08-21 12:18:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:16,320 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1216 transitions. [2021-08-21 12:18:16,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1216 transitions. [2021-08-21 12:18:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:16,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:16,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:16,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:16,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 12:18:16,521 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:16,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1964558461, now seen corresponding path program 34 times [2021-08-21 12:18:16,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:16,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068357615] [2021-08-21 12:18:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:16,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:16,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:16,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068357615] [2021-08-21 12:18:16,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068357615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:16,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369706352] [2021-08-21 12:18:16,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:16,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:16,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:16,968 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:16,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 12:18:19,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:18:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:20,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:18:20,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2021-08-21 12:18:20,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:18:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:20,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369706352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:20,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:20,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:18:20,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46645739] [2021-08-21 12:18:20,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:20,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:20,215 INFO L87 Difference]: Start difference. First operand 374 states and 1216 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 12:18:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:20,497 INFO L93 Difference]: Finished difference Result 430 states and 1374 transitions. [2021-08-21 12:18:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:18:20,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:20,498 INFO L225 Difference]: With dead ends: 430 [2021-08-21 12:18:20,498 INFO L226 Difference]: Without dead ends: 420 [2021-08-21 12:18:20,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:18:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-21 12:18:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 375. [2021-08-21 12:18:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.2620320855614975) internal successors, (1220), 374 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1220 transitions. [2021-08-21 12:18:20,502 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1220 transitions. Word has length 17 [2021-08-21 12:18:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:20,502 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1220 transitions. [2021-08-21 12:18:20,502 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 12:18:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1220 transitions. [2021-08-21 12:18:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:20,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:20,503 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:20,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-21 12:18:20,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:20,703 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1703909517, now seen corresponding path program 35 times [2021-08-21 12:18:20,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:20,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287061144] [2021-08-21 12:18:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:20,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:21,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:21,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287061144] [2021-08-21 12:18:21,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287061144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:21,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50253793] [2021-08-21 12:18:21,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:21,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:21,080 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:21,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 12:18:24,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:18:24,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:24,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:18:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:24,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:18:24,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:18:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-08-21 12:18:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:24,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50253793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:24,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:18:24,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592583413] [2021-08-21 12:18:24,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:24,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:24,369 INFO L87 Difference]: Start difference. First operand 375 states and 1220 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:24,897 INFO L93 Difference]: Finished difference Result 426 states and 1362 transitions. [2021-08-21 12:18:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:18:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:24,898 INFO L225 Difference]: With dead ends: 426 [2021-08-21 12:18:24,898 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 12:18:24,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 602.2ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:18:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 12:18:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 376. [2021-08-21 12:18:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.2666666666666666) internal successors, (1225), 375 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1225 transitions. [2021-08-21 12:18:24,902 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1225 transitions. Word has length 17 [2021-08-21 12:18:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:24,902 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1225 transitions. [2021-08-21 12:18:24,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1225 transitions. [2021-08-21 12:18:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:24,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:24,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:24,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:25,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 12:18:25,104 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash -300254555, now seen corresponding path program 36 times [2021-08-21 12:18:25,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:25,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798230986] [2021-08-21 12:18:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:25,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:25,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:25,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798230986] [2021-08-21 12:18:25,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798230986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:25,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183330768] [2021-08-21 12:18:25,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:25,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:25,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:25,577 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:25,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 12:18:28,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:18:28,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:28,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-21 12:18:29,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 86 [2021-08-21 12:18:29,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-08-21 12:18:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:29,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183330768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:29,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:29,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 12:18:29,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489039500] [2021-08-21 12:18:29,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:18:29,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:18:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:18:29,508 INFO L87 Difference]: Start difference. First operand 376 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:30,380 INFO L93 Difference]: Finished difference Result 425 states and 1349 transitions. [2021-08-21 12:18:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:18:30,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:30,381 INFO L225 Difference]: With dead ends: 425 [2021-08-21 12:18:30,381 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:18:30,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1066.0ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:18:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:18:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 373. [2021-08-21 12:18:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.2446236559139785) internal successors, (1207), 372 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1207 transitions. [2021-08-21 12:18:30,385 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1207 transitions. Word has length 17 [2021-08-21 12:18:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:30,386 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1207 transitions. [2021-08-21 12:18:30,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1207 transitions. [2021-08-21 12:18:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:30,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:30,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:30,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-21 12:18:30,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 12:18:30,587 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash 693317275, now seen corresponding path program 37 times [2021-08-21 12:18:30,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:30,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556799415] [2021-08-21 12:18:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:30,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:31,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:31,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556799415] [2021-08-21 12:18:31,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556799415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:31,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654903465] [2021-08-21 12:18:31,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:18:31,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:31,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:31,081 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:31,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 12:18:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:34,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:18:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:34,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-21 12:18:34,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2021-08-21 12:18:34,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:18:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:34,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654903465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:34,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:34,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:18:34,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599755429] [2021-08-21 12:18:34,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:34,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:34,423 INFO L87 Difference]: Start difference. First operand 373 states and 1207 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 12:18:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:35,145 INFO L93 Difference]: Finished difference Result 433 states and 1354 transitions. [2021-08-21 12:18:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:18:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:35,146 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:18:35,146 INFO L226 Difference]: Without dead ends: 411 [2021-08-21 12:18:35,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 736.7ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:18:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-08-21 12:18:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 371. [2021-08-21 12:18:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.245945945945946) internal successors, (1201), 370 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1201 transitions. [2021-08-21 12:18:35,151 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1201 transitions. Word has length 17 [2021-08-21 12:18:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:35,151 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1201 transitions. [2021-08-21 12:18:35,151 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 12:18:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1201 transitions. [2021-08-21 12:18:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:35,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:35,151 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 12:18:35,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:35,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-08-21 12:18:35,368 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1704713307, now seen corresponding path program 38 times [2021-08-21 12:18:35,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:35,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523943899] [2021-08-21 12:18:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:35,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:35,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:35,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523943899] [2021-08-21 12:18:35,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523943899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:35,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542279844] [2021-08-21 12:18:35,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:18:35,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:35,777 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:35,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 12:18:38,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:18:38,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:18:38,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:38,930 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 63 treesize of output 51 [2021-08-21 12:18:39,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:18:39,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2021-08-21 12:18:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:39,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542279844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:39,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:39,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:18:39,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446949114] [2021-08-21 12:18:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:18:39,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:18:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:18:39,181 INFO L87 Difference]: Start difference. First operand 371 states and 1201 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:39,731 INFO L93 Difference]: Finished difference Result 415 states and 1322 transitions. [2021-08-21 12:18:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:18:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:39,732 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:18:39,732 INFO L226 Difference]: Without dead ends: 405 [2021-08-21 12:18:39,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:18:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-21 12:18:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 373. [2021-08-21 12:18:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.2446236559139785) internal successors, (1207), 372 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1207 transitions. [2021-08-21 12:18:39,737 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1207 transitions. Word has length 17 [2021-08-21 12:18:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:39,737 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1207 transitions. [2021-08-21 12:18:39,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1207 transitions. [2021-08-21 12:18:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:39,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:39,737 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:39,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:39,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 12:18:39,941 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2047296819, now seen corresponding path program 39 times [2021-08-21 12:18:39,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:39,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491854339] [2021-08-21 12:18:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:39,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:40,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:40,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491854339] [2021-08-21 12:18:40,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491854339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:40,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973650251] [2021-08-21 12:18:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:18:40,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:40,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:40,315 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:40,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 12:18:43,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:18:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:43,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:18:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:43,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:18:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 140 [2021-08-21 12:18:43,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 114 [2021-08-21 12:18:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:44,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973650251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:44,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:44,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-21 12:18:44,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445928115] [2021-08-21 12:18:44,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:18:44,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:18:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:18:44,904 INFO L87 Difference]: Start difference. First operand 373 states and 1207 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 12:18:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:45,505 INFO L93 Difference]: Finished difference Result 413 states and 1316 transitions. [2021-08-21 12:18:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:18:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:45,506 INFO L225 Difference]: With dead ends: 413 [2021-08-21 12:18:45,506 INFO L226 Difference]: Without dead ends: 402 [2021-08-21 12:18:45,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:18:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-21 12:18:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 371. [2021-08-21 12:18:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.245945945945946) internal successors, (1201), 370 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1201 transitions. [2021-08-21 12:18:45,511 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1201 transitions. Word has length 17 [2021-08-21 12:18:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:45,511 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1201 transitions. [2021-08-21 12:18:45,511 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 12:18:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1201 transitions. [2021-08-21 12:18:45,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:45,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:45,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:45,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:45,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:45,712 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash -456033651, now seen corresponding path program 40 times [2021-08-21 12:18:45,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:45,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51556418] [2021-08-21 12:18:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:45,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:46,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:46,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51556418] [2021-08-21 12:18:46,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51556418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:46,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784692356] [2021-08-21 12:18:46,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:18:46,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:46,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:46,125 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:46,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 12:18:49,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:18:49,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:18:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:49,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-08-21 12:18:49,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 139 [2021-08-21 12:18:49,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 113 [2021-08-21 12:18:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:50,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784692356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:50,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:50,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:18:50,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982689362] [2021-08-21 12:18:50,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:50,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:50,620 INFO L87 Difference]: Start difference. First operand 371 states and 1201 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 12:18:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:52,140 INFO L93 Difference]: Finished difference Result 485 states and 1531 transitions. [2021-08-21 12:18:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:18:52,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:52,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:52,141 INFO L225 Difference]: With dead ends: 485 [2021-08-21 12:18:52,141 INFO L226 Difference]: Without dead ends: 469 [2021-08-21 12:18:52,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1481.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:18:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-21 12:18:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 375. [2021-08-21 12:18:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.2540106951871657) internal successors, (1217), 374 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1217 transitions. [2021-08-21 12:18:52,146 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1217 transitions. Word has length 17 [2021-08-21 12:18:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:52,146 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1217 transitions. [2021-08-21 12:18:52,146 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 12:18:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1217 transitions. [2021-08-21 12:18:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:52,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:52,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:52,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-21 12:18:52,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:52,347 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash 818915027, now seen corresponding path program 41 times [2021-08-21 12:18:52,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:52,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359399249] [2021-08-21 12:18:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:52,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:52,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:52,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359399249] [2021-08-21 12:18:52,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359399249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:52,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857668625] [2021-08-21 12:18:52,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:18:52,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:52,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:52,638 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:52,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 12:18:55,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:18:55,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:18:55,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:18:55,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:18:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-08-21 12:18:56,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 90 [2021-08-21 12:18:56,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2021-08-21 12:18:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:56,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857668625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:56,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:18:56,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:18:56,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178205532] [2021-08-21 12:18:56,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:18:56,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:18:56,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:18:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:18:56,503 INFO L87 Difference]: Start difference. First operand 375 states and 1217 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 12:18:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:18:57,121 INFO L93 Difference]: Finished difference Result 449 states and 1419 transitions. [2021-08-21 12:18:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:18:57,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:18:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:18:57,122 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:18:57,122 INFO L226 Difference]: Without dead ends: 424 [2021-08-21 12:18:57,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:18:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-08-21 12:18:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 380. [2021-08-21 12:18:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.253298153034301) internal successors, (1233), 379 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:18:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1233 transitions. [2021-08-21 12:18:57,127 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1233 transitions. Word has length 17 [2021-08-21 12:18:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:18:57,127 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1233 transitions. [2021-08-21 12:18:57,127 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 12:18:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1233 transitions. [2021-08-21 12:18:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:18:57,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:18:57,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:18:57,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 12:18:57,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:57,328 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:18:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:18:57,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1161498539, now seen corresponding path program 42 times [2021-08-21 12:18:57,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:18:57,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274726136] [2021-08-21 12:18:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:18:57,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:18:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:18:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:18:58,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:18:58,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274726136] [2021-08-21 12:18:58,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274726136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:18:58,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164227705] [2021-08-21 12:18:58,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:18:58,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:18:58,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:18:58,071 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:18:58,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 12:19:01,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:19:01,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:01,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:01,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-08-21 12:19:01,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2021-08-21 12:19:01,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2021-08-21 12:19:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:02,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164227705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:02,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:02,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 12:19:02,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507165370] [2021-08-21 12:19:02,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:19:02,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:19:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:19:02,416 INFO L87 Difference]: Start difference. First operand 380 states and 1233 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:03,561 INFO L93 Difference]: Finished difference Result 437 states and 1382 transitions. [2021-08-21 12:19:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:19:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:03,562 INFO L225 Difference]: With dead ends: 437 [2021-08-21 12:19:03,562 INFO L226 Difference]: Without dead ends: 420 [2021-08-21 12:19:03,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1362.5ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:19:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-21 12:19:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 380. [2021-08-21 12:19:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.253298153034301) internal successors, (1233), 379 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1233 transitions. [2021-08-21 12:19:03,567 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1233 transitions. Word has length 17 [2021-08-21 12:19:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:03,567 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1233 transitions. [2021-08-21 12:19:03,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1233 transitions. [2021-08-21 12:19:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:03,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:03,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:03,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:03,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2021-08-21 12:19:03,768 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2133699761, now seen corresponding path program 43 times [2021-08-21 12:19:03,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:03,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270923494] [2021-08-21 12:19:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:03,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:04,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:04,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270923494] [2021-08-21 12:19:04,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270923494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:04,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534985781] [2021-08-21 12:19:04,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:04,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:04,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:04,117 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:04,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 12:19:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:07,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:19:07,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:07,597 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:07,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-08-21 12:19:07,972 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:07,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:19:07,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2021-08-21 12:19:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:08,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534985781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:08,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:08,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:19:08,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539341081] [2021-08-21 12:19:08,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:08,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:08,083 INFO L87 Difference]: Start difference. First operand 380 states and 1233 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 12:19:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:08,803 INFO L93 Difference]: Finished difference Result 580 states and 1798 transitions. [2021-08-21 12:19:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:19:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:08,804 INFO L225 Difference]: With dead ends: 580 [2021-08-21 12:19:08,804 INFO L226 Difference]: Without dead ends: 560 [2021-08-21 12:19:08,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:19:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-21 12:19:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 383. [2021-08-21 12:19:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.2460732984293195) internal successors, (1240), 382 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1240 transitions. [2021-08-21 12:19:08,810 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1240 transitions. Word has length 17 [2021-08-21 12:19:08,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:08,810 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1240 transitions. [2021-08-21 12:19:08,810 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 12:19:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1240 transitions. [2021-08-21 12:19:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:08,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:08,811 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:08,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-21 12:19:09,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:09,011 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash 212201181, now seen corresponding path program 44 times [2021-08-21 12:19:09,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:09,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231966551] [2021-08-21 12:19:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:09,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:09,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:09,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231966551] [2021-08-21 12:19:09,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231966551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:09,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976501155] [2021-08-21 12:19:09,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:09,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:09,417 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 12:19:12,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:12,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:12,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:19:12,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:13,018 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:13,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:19:13,341 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:13,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 98 [2021-08-21 12:19:13,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2021-08-21 12:19:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976501155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:13,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:13,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:19:13,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271723991] [2021-08-21 12:19:13,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:13,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:13,498 INFO L87 Difference]: Start difference. First operand 383 states and 1240 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 12:19:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:14,691 INFO L93 Difference]: Finished difference Result 464 states and 1453 transitions. [2021-08-21 12:19:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:19:14,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:14,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:14,692 INFO L225 Difference]: With dead ends: 464 [2021-08-21 12:19:14,692 INFO L226 Difference]: Without dead ends: 445 [2021-08-21 12:19:14,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1099.5ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:19:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-08-21 12:19:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 385. [2021-08-21 12:19:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2421875) internal successors, (1245), 384 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1245 transitions. [2021-08-21 12:19:14,697 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1245 transitions. Word has length 17 [2021-08-21 12:19:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:14,697 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1245 transitions. [2021-08-21 12:19:14,697 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 12:19:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1245 transitions. [2021-08-21 12:19:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:14,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:14,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:14,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:14,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:14,898 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:14,898 INFO L82 PathProgramCache]: Analyzing trace with hash -48447763, now seen corresponding path program 45 times [2021-08-21 12:19:14,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:14,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031638487] [2021-08-21 12:19:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:14,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:15,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:15,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031638487] [2021-08-21 12:19:15,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031638487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:15,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266585431] [2021-08-21 12:19:15,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:15,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:15,163 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:15,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 12:19:18,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:19:18,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:18,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:18,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:18,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82 [2021-08-21 12:19:19,175 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:19,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 114 [2021-08-21 12:19:19,181 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:19,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 96 [2021-08-21 12:19:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:19,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266585431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:19,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:19,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:19:19,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421682052] [2021-08-21 12:19:19,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:19,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:19,382 INFO L87 Difference]: Start difference. First operand 385 states and 1245 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 12:19:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:20,059 INFO L93 Difference]: Finished difference Result 434 states and 1360 transitions. [2021-08-21 12:19:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:19:20,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:20,060 INFO L225 Difference]: With dead ends: 434 [2021-08-21 12:19:20,060 INFO L226 Difference]: Without dead ends: 427 [2021-08-21 12:19:20,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:19:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-21 12:19:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 382. [2021-08-21 12:19:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 3.2493438320209975) internal successors, (1238), 381 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1238 transitions. [2021-08-21 12:19:20,064 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1238 transitions. Word has length 17 [2021-08-21 12:19:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:20,064 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 1238 transitions. [2021-08-21 12:19:20,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1238 transitions. [2021-08-21 12:19:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:20,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:20,065 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:20,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-21 12:19:20,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-21 12:19:20,269 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:20,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:20,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1074269175, now seen corresponding path program 46 times [2021-08-21 12:19:20,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:20,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911682412] [2021-08-21 12:19:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:20,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:20,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:20,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911682412] [2021-08-21 12:19:20,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911682412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:20,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547654599] [2021-08-21 12:19:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:20,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:20,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:20,607 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:20,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 12:19:24,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:24,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:24,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:19:24,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:24,482 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 83 treesize of output 71 [2021-08-21 12:19:24,738 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:24,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 132 [2021-08-21 12:19:24,745 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:24,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 110 [2021-08-21 12:19:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:24,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547654599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:24,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:24,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:19:24,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896032881] [2021-08-21 12:19:24,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:24,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:24,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:24,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:24,949 INFO L87 Difference]: Start difference. First operand 382 states and 1238 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 12:19:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:25,604 INFO L93 Difference]: Finished difference Result 474 states and 1472 transitions. [2021-08-21 12:19:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:19:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:25,605 INFO L225 Difference]: With dead ends: 474 [2021-08-21 12:19:25,605 INFO L226 Difference]: Without dead ends: 462 [2021-08-21 12:19:25,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 755.4ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:19:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-21 12:19:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 380. [2021-08-21 12:19:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.2453825857519787) internal successors, (1230), 379 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1230 transitions. [2021-08-21 12:19:25,609 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1230 transitions. Word has length 17 [2021-08-21 12:19:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:25,609 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1230 transitions. [2021-08-21 12:19:25,609 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 12:19:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1230 transitions. [2021-08-21 12:19:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:25,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:25,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:25,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:25,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 12:19:25,811 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:25,811 INFO L82 PathProgramCache]: Analyzing trace with hash 671540775, now seen corresponding path program 47 times [2021-08-21 12:19:25,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:25,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607803953] [2021-08-21 12:19:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:25,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:26,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:26,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607803953] [2021-08-21 12:19:26,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607803953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:26,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791144516] [2021-08-21 12:19:26,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:26,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:26,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:26,173 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:26,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 12:19:29,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:19:29,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:19:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:29,855 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:29,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-08-21 12:19:30,390 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:30,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:19:30,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2021-08-21 12:19:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:30,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791144516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:30,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:30,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:19:30,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320247455] [2021-08-21 12:19:30,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:30,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:30,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:30,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:30,523 INFO L87 Difference]: Start difference. First operand 380 states and 1230 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 12:19:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:31,793 INFO L93 Difference]: Finished difference Result 506 states and 1581 transitions. [2021-08-21 12:19:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:19:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:31,795 INFO L225 Difference]: With dead ends: 506 [2021-08-21 12:19:31,795 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:19:31,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1040.0ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:19:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:19:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 386. [2021-08-21 12:19:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.251948051948052) internal successors, (1252), 385 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1252 transitions. [2021-08-21 12:19:31,800 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1252 transitions. Word has length 17 [2021-08-21 12:19:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:31,800 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1252 transitions. [2021-08-21 12:19:31,800 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 12:19:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1252 transitions. [2021-08-21 12:19:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:31,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:31,801 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:31,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-21 12:19:32,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 12:19:32,001 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:32,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:32,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1632639089, now seen corresponding path program 48 times [2021-08-21 12:19:32,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:32,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110960270] [2021-08-21 12:19:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:32,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:32,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:32,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110960270] [2021-08-21 12:19:32,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110960270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:32,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205300998] [2021-08-21 12:19:32,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:19:32,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:32,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:32,463 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:32,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 12:19:36,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:19:36,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:36,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:19:36,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:36,288 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:36,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-08-21 12:19:36,640 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:36,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:19:36,643 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 78 treesize of output 62 [2021-08-21 12:19:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:36,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205300998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:36,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:36,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:19:36,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678276312] [2021-08-21 12:19:36,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:36,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:36,777 INFO L87 Difference]: Start difference. First operand 386 states and 1252 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 12:19:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:37,487 INFO L93 Difference]: Finished difference Result 453 states and 1436 transitions. [2021-08-21 12:19:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:19:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:37,488 INFO L225 Difference]: With dead ends: 453 [2021-08-21 12:19:37,488 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:19:37,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:19:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:19:37,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 389. [2021-08-21 12:19:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.2551546391752577) internal successors, (1263), 388 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1263 transitions. [2021-08-21 12:19:37,493 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1263 transitions. Word has length 17 [2021-08-21 12:19:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:37,493 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1263 transitions. [2021-08-21 12:19:37,493 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 12:19:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1263 transitions. [2021-08-21 12:19:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:37,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:37,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:37,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-08-21 12:19:37,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:37,694 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash -927322703, now seen corresponding path program 49 times [2021-08-21 12:19:37,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:37,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543715580] [2021-08-21 12:19:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:37,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:38,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:38,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543715580] [2021-08-21 12:19:38,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543715580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:38,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347361736] [2021-08-21 12:19:38,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:19:38,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:38,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:38,082 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:38,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 12:19:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:19:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:41,980 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:41,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:19:42,125 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:42,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2021-08-21 12:19:42,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2021-08-21 12:19:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:42,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347361736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:42,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:42,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:19:42,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355186677] [2021-08-21 12:19:42,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:42,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:42,337 INFO L87 Difference]: Start difference. First operand 389 states and 1263 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 12:19:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:43,269 INFO L93 Difference]: Finished difference Result 446 states and 1416 transitions. [2021-08-21 12:19:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:19:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:43,270 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:19:43,270 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:19:43,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:19:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:19:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 387. [2021-08-21 12:19:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.2694300518134716) internal successors, (1262), 386 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1262 transitions. [2021-08-21 12:19:43,274 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1262 transitions. Word has length 17 [2021-08-21 12:19:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:43,275 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1262 transitions. [2021-08-21 12:19:43,275 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 12:19:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1262 transitions. [2021-08-21 12:19:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:43,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:43,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:43,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:43,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:43,476 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:43,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1699418511, now seen corresponding path program 50 times [2021-08-21 12:19:43,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:43,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355228345] [2021-08-21 12:19:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:43,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:43,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:43,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355228345] [2021-08-21 12:19:43,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355228345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:43,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3457258] [2021-08-21 12:19:43,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:19:43,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:43,937 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:43,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 12:19:47,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:19:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:19:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:47,794 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-08-21 12:19:48,063 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:48,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:19:48,073 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 78 treesize of output 62 [2021-08-21 12:19:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3457258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:48,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:19:48,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699945493] [2021-08-21 12:19:48,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:48,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:48,199 INFO L87 Difference]: Start difference. First operand 387 states and 1262 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 12:19:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:48,542 INFO L93 Difference]: Finished difference Result 454 states and 1443 transitions. [2021-08-21 12:19:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:19:48,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:48,543 INFO L225 Difference]: With dead ends: 454 [2021-08-21 12:19:48,543 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 12:19:48,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:19:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 12:19:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 387. [2021-08-21 12:19:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.2694300518134716) internal successors, (1262), 386 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1262 transitions. [2021-08-21 12:19:48,548 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1262 transitions. Word has length 17 [2021-08-21 12:19:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:48,549 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1262 transitions. [2021-08-21 12:19:48,549 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 12:19:48,549 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1262 transitions. [2021-08-21 12:19:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:48,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:48,549 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:48,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-21 12:19:48,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-08-21 12:19:48,750 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1960067455, now seen corresponding path program 51 times [2021-08-21 12:19:48,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:48,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720657860] [2021-08-21 12:19:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:48,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:49,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:49,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720657860] [2021-08-21 12:19:49,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720657860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:49,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753408619] [2021-08-21 12:19:49,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:19:49,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:49,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:49,105 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:49,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 12:19:52,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:19:52,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:52,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:19:52,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:53,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 103 [2021-08-21 12:19:53,533 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:53,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 136 [2021-08-21 12:19:53,539 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 114 [2021-08-21 12:19:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:53,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753408619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:53,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:53,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:19:53,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340029011] [2021-08-21 12:19:53,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:19:53,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:19:53,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:19:53,734 INFO L87 Difference]: Start difference. First operand 387 states and 1262 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 12:19:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:54,140 INFO L93 Difference]: Finished difference Result 420 states and 1339 transitions. [2021-08-21 12:19:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:19:54,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:54,141 INFO L225 Difference]: With dead ends: 420 [2021-08-21 12:19:54,141 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 12:19:54,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:19:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 12:19:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 387. [2021-08-21 12:19:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.2694300518134716) internal successors, (1262), 386 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1262 transitions. [2021-08-21 12:19:54,146 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1262 transitions. Word has length 17 [2021-08-21 12:19:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:54,146 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1262 transitions. [2021-08-21 12:19:54,146 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 12:19:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1262 transitions. [2021-08-21 12:19:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:54,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:54,147 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:54,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-21 12:19:54,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:54,347 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1747958309, now seen corresponding path program 52 times [2021-08-21 12:19:54,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:54,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425735662] [2021-08-21 12:19:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:54,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:54,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:54,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425735662] [2021-08-21 12:19:54,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425735662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:54,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430443303] [2021-08-21 12:19:54,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:19:54,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:54,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:54,626 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:54,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 12:19:58,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:19:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:19:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:19:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:19:58,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-08-21 12:19:58,680 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 86 [2021-08-21 12:19:58,687 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:19:58,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 70 [2021-08-21 12:19:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:58,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430443303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:58,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:19:58,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:19:58,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526980106] [2021-08-21 12:19:58,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:19:58,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:19:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:19:58,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:19:58,871 INFO L87 Difference]: Start difference. First operand 387 states and 1262 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:19:59,255 INFO L93 Difference]: Finished difference Result 455 states and 1437 transitions. [2021-08-21 12:19:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:19:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:19:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:19:59,256 INFO L225 Difference]: With dead ends: 455 [2021-08-21 12:19:59,256 INFO L226 Difference]: Without dead ends: 445 [2021-08-21 12:19:59,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:19:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-08-21 12:19:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 383. [2021-08-21 12:19:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.261780104712042) internal successors, (1246), 382 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1246 transitions. [2021-08-21 12:19:59,269 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1246 transitions. Word has length 17 [2021-08-21 12:19:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:19:59,269 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1246 transitions. [2021-08-21 12:19:59,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:19:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1246 transitions. [2021-08-21 12:19:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:19:59,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:19:59,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:19:59,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-21 12:19:59,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2021-08-21 12:19:59,470 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:19:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:19:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash 330735769, now seen corresponding path program 53 times [2021-08-21 12:19:59,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:19:59,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555950557] [2021-08-21 12:19:59,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:19:59,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:19:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:19:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:19:59,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:19:59,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555950557] [2021-08-21 12:19:59,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555950557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:19:59,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270616321] [2021-08-21 12:19:59,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:19:59,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:19:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:19:59,875 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:19:59,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 12:20:03,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:20:03,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:20:03,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:03,887 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:03,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:20:04,360 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 98 [2021-08-21 12:20:04,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2021-08-21 12:20:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:04,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270616321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:04,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:04,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:20:04,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2296771] [2021-08-21 12:20:04,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:04,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:04,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:04,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:04,510 INFO L87 Difference]: Start difference. First operand 383 states and 1246 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:05,103 INFO L93 Difference]: Finished difference Result 446 states and 1417 transitions. [2021-08-21 12:20:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:20:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:05,104 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:20:05,104 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:20:05,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:20:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:20:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 385. [2021-08-21 12:20:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2604166666666665) internal successors, (1252), 384 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1252 transitions. [2021-08-21 12:20:05,117 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1252 transitions. Word has length 17 [2021-08-21 12:20:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:05,117 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1252 transitions. [2021-08-21 12:20:05,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:05,117 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1252 transitions. [2021-08-21 12:20:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:05,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:05,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:05,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-21 12:20:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:05,329 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1324307599, now seen corresponding path program 54 times [2021-08-21 12:20:05,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:05,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797894257] [2021-08-21 12:20:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:05,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:05,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:05,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797894257] [2021-08-21 12:20:05,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797894257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:05,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778780747] [2021-08-21 12:20:05,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:05,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:05,888 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:05,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 12:20:09,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:20:09,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:20:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:10,031 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:10,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-08-21 12:20:10,326 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:10,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-08-21 12:20:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 121 [2021-08-21 12:20:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:10,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778780747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:10,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:10,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:20:10,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417028814] [2021-08-21 12:20:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:10,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:10,968 INFO L87 Difference]: Start difference. First operand 385 states and 1252 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:11,712 INFO L93 Difference]: Finished difference Result 458 states and 1430 transitions. [2021-08-21 12:20:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:20:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:11,713 INFO L225 Difference]: With dead ends: 458 [2021-08-21 12:20:11,713 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:20:11,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 847.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:20:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:20:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 383. [2021-08-21 12:20:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.261780104712042) internal successors, (1246), 382 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1246 transitions. [2021-08-21 12:20:11,717 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1246 transitions. Word has length 17 [2021-08-21 12:20:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:11,718 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1246 transitions. [2021-08-21 12:20:11,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1246 transitions. [2021-08-21 12:20:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:11,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:11,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:11,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2021-08-21 12:20:11,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:11,919 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1959263665, now seen corresponding path program 55 times [2021-08-21 12:20:11,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:11,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669030133] [2021-08-21 12:20:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:11,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:12,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:12,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669030133] [2021-08-21 12:20:12,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669030133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:12,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222285475] [2021-08-21 12:20:12,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:12,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:12,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:12,375 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:12,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 12:20:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:16,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:20:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:16,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-08-21 12:20:16,622 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:16,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 86 [2021-08-21 12:20:16,628 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:16,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 70 [2021-08-21 12:20:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:16,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222285475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:16,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:16,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:20:16,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286433460] [2021-08-21 12:20:16,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:20:16,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:20:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:20:16,789 INFO L87 Difference]: Start difference. First operand 383 states and 1246 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:17,459 INFO L93 Difference]: Finished difference Result 440 states and 1398 transitions. [2021-08-21 12:20:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:20:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:17,460 INFO L225 Difference]: With dead ends: 440 [2021-08-21 12:20:17,460 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 12:20:17,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 678.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:20:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 12:20:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 385. [2021-08-21 12:20:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2604166666666665) internal successors, (1252), 384 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1252 transitions. [2021-08-21 12:20:17,465 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1252 transitions. Word has length 17 [2021-08-21 12:20:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:17,465 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1252 transitions. [2021-08-21 12:20:17,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1252 transitions. [2021-08-21 12:20:17,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:17,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:17,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:17,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 12:20:17,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-08-21 12:20:17,670 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:17,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1616680153, now seen corresponding path program 56 times [2021-08-21 12:20:17,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:17,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259398854] [2021-08-21 12:20:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:17,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:18,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:18,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259398854] [2021-08-21 12:20:18,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259398854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:18,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635775161] [2021-08-21 12:20:18,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:20:18,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:18,040 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:18,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 12:20:21,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:20:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:20:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:22,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:20:22,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2021-08-21 12:20:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:20:22,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 108 [2021-08-21 12:20:22,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 90 [2021-08-21 12:20:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:23,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635775161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:23,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:20:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249018637] [2021-08-21 12:20:23,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:23,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:23,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:23,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:23,112 INFO L87 Difference]: Start difference. First operand 385 states and 1252 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:23,795 INFO L93 Difference]: Finished difference Result 438 states and 1392 transitions. [2021-08-21 12:20:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:23,797 INFO L225 Difference]: With dead ends: 438 [2021-08-21 12:20:23,797 INFO L226 Difference]: Without dead ends: 427 [2021-08-21 12:20:23,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:20:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-21 12:20:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 385. [2021-08-21 12:20:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.2604166666666665) internal successors, (1252), 384 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1252 transitions. [2021-08-21 12:20:23,802 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1252 transitions. Word has length 17 [2021-08-21 12:20:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:23,802 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1252 transitions. [2021-08-21 12:20:23,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1252 transitions. [2021-08-21 12:20:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:23,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:23,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:23,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-21 12:20:24,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 12:20:24,009 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1018402129, now seen corresponding path program 57 times [2021-08-21 12:20:24,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:24,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125959850] [2021-08-21 12:20:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:24,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:24,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:24,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125959850] [2021-08-21 12:20:24,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125959850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:24,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564370669] [2021-08-21 12:20:24,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:20:24,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:24,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:24,386 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:24,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 12:20:28,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:20:28,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:28,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:20:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:28,591 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:28,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-08-21 12:20:29,115 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:29,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:20:29,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2021-08-21 12:20:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:29,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564370669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:29,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:29,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:20:29,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021988510] [2021-08-21 12:20:29,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:29,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:29,239 INFO L87 Difference]: Start difference. First operand 385 states and 1252 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:30,626 INFO L93 Difference]: Finished difference Result 584 states and 1810 transitions. [2021-08-21 12:20:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:20:30,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:30,628 INFO L225 Difference]: With dead ends: 584 [2021-08-21 12:20:30,628 INFO L226 Difference]: Without dead ends: 561 [2021-08-21 12:20:30,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1210.9ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:20:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-08-21 12:20:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 393. [2021-08-21 12:20:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 3.2551020408163267) internal successors, (1276), 392 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 12:20:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1276 transitions. [2021-08-21 12:20:30,633 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1276 transitions. Word has length 17 [2021-08-21 12:20:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:30,634 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1276 transitions. [2021-08-21 12:20:30,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1276 transitions. [2021-08-21 12:20:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:30,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:30,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:30,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-08-21 12:20:30,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:30,835 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash -57303815, now seen corresponding path program 58 times [2021-08-21 12:20:30,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:30,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154729719] [2021-08-21 12:20:30,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:30,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:31,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:31,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154729719] [2021-08-21 12:20:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154729719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:31,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467953175] [2021-08-21 12:20:31,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:20:31,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:31,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:31,262 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:31,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 12:20:35,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:20:35,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:20:35,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:35,638 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:35,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 77 [2021-08-21 12:20:36,344 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:36,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 142 [2021-08-21 12:20:36,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2021-08-21 12:20:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:36,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467953175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:36,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:36,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:20:36,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765350318] [2021-08-21 12:20:36,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:36,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:36,939 INFO L87 Difference]: Start difference. First operand 393 states and 1276 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:38,011 INFO L93 Difference]: Finished difference Result 527 states and 1649 transitions. [2021-08-21 12:20:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:38,013 INFO L225 Difference]: With dead ends: 527 [2021-08-21 12:20:38,013 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 12:20:38,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1060.2ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:20:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 12:20:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 395. [2021-08-21 12:20:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.253807106598985) internal successors, (1282), 394 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1282 transitions. [2021-08-21 12:20:38,018 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1282 transitions. Word has length 17 [2021-08-21 12:20:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:38,018 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1282 transitions. [2021-08-21 12:20:38,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1282 transitions. [2021-08-21 12:20:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:38,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:38,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:38,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2021-08-21 12:20:38,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-08-21 12:20:38,220 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1677701689, now seen corresponding path program 59 times [2021-08-21 12:20:38,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:38,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73190733] [2021-08-21 12:20:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:38,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:38,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:38,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73190733] [2021-08-21 12:20:38,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73190733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:38,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121181417] [2021-08-21 12:20:38,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:20:38,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:38,704 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:38,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 12:20:42,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:20:42,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:20:42,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:43,097 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:43,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:20:43,250 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:43,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2021-08-21 12:20:43,253 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 90 treesize of output 74 [2021-08-21 12:20:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:43,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121181417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:43,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:43,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:20:43,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889075292] [2021-08-21 12:20:43,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:20:43,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:20:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:20:43,474 INFO L87 Difference]: Start difference. First operand 395 states and 1282 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:44,534 INFO L93 Difference]: Finished difference Result 519 states and 1624 transitions. [2021-08-21 12:20:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:20:44,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:44,535 INFO L225 Difference]: With dead ends: 519 [2021-08-21 12:20:44,535 INFO L226 Difference]: Without dead ends: 508 [2021-08-21 12:20:44,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 973.1ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:20:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-08-21 12:20:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 389. [2021-08-21 12:20:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.2577319587628866) internal successors, (1264), 388 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1264 transitions. [2021-08-21 12:20:44,541 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1264 transitions. Word has length 17 [2021-08-21 12:20:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:44,541 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1264 transitions. [2021-08-21 12:20:44,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1264 transitions. [2021-08-21 12:20:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:44,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:44,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:44,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-21 12:20:44,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:44,744 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash -29760549, now seen corresponding path program 60 times [2021-08-21 12:20:44,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:44,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780933603] [2021-08-21 12:20:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:44,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:45,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:45,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780933603] [2021-08-21 12:20:45,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780933603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:45,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208284428] [2021-08-21 12:20:45,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:20:45,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:45,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:45,112 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:45,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 12:20:49,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:20:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:20:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:20:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:49,596 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:49,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 97 [2021-08-21 12:20:50,514 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:50,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 112 [2021-08-21 12:20:50,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 93 [2021-08-21 12:20:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:50,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208284428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:50,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:50,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:20:50,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322964162] [2021-08-21 12:20:50,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:50,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:50,823 INFO L87 Difference]: Start difference. First operand 389 states and 1264 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:51,455 INFO L93 Difference]: Finished difference Result 543 states and 1700 transitions. [2021-08-21 12:20:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:20:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:51,457 INFO L225 Difference]: With dead ends: 543 [2021-08-21 12:20:51,457 INFO L226 Difference]: Without dead ends: 533 [2021-08-21 12:20:51,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 678.6ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:20:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-21 12:20:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 395. [2021-08-21 12:20:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.2588832487309647) internal successors, (1284), 394 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1284 transitions. [2021-08-21 12:20:51,462 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1284 transitions. Word has length 17 [2021-08-21 12:20:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:51,462 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1284 transitions. [2021-08-21 12:20:51,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1284 transitions. [2021-08-21 12:20:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:51,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:51,463 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:51,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-21 12:20:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-08-21 12:20:51,663 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1705244955, now seen corresponding path program 61 times [2021-08-21 12:20:51,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:51,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134960462] [2021-08-21 12:20:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:51,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:52,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:20:52,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134960462] [2021-08-21 12:20:52,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134960462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:52,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594458965] [2021-08-21 12:20:52,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:20:52,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:20:52,094 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:20:52,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 12:20:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:20:56,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:20:56,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:20:56,999 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:56,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:20:57,141 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:20:57,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 98 [2021-08-21 12:20:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2021-08-21 12:20:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:20:57,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594458965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:20:57,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:20:57,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:20:57,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702453952] [2021-08-21 12:20:57,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:20:57,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:20:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:20:57,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:20:57,357 INFO L87 Difference]: Start difference. First operand 395 states and 1284 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:20:59,573 INFO L93 Difference]: Finished difference Result 556 states and 1720 transitions. [2021-08-21 12:20:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:20:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:20:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:20:59,574 INFO L225 Difference]: With dead ends: 556 [2021-08-21 12:20:59,574 INFO L226 Difference]: Without dead ends: 545 [2021-08-21 12:20:59,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2016.9ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:20:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-21 12:20:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 397. [2021-08-21 12:20:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.2525252525252526) internal successors, (1288), 396 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1288 transitions. [2021-08-21 12:20:59,579 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1288 transitions. Word has length 17 [2021-08-21 12:20:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:20:59,579 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1288 transitions. [2021-08-21 12:20:59,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:20:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1288 transitions. [2021-08-21 12:20:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:20:59,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:20:59,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:20:59,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-21 12:20:59,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:20:59,781 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:20:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:20:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash 96929773, now seen corresponding path program 62 times [2021-08-21 12:20:59,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:20:59,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809680962] [2021-08-21 12:20:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:20:59,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:20:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:00,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:00,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809680962] [2021-08-21 12:21:00,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809680962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:00,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729158200] [2021-08-21 12:21:00,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:21:00,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:00,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:00,128 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:00,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 12:21:04,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:04,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:21:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:04,596 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:04,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2021-08-21 12:21:04,851 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:04,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2021-08-21 12:21:04,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2021-08-21 12:21:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:05,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729158200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:05,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:05,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:21:05,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449786819] [2021-08-21 12:21:05,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:05,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:05,067 INFO L87 Difference]: Start difference. First operand 397 states and 1288 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:06,165 INFO L93 Difference]: Finished difference Result 611 states and 1916 transitions. [2021-08-21 12:21:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:21:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:06,166 INFO L225 Difference]: With dead ends: 611 [2021-08-21 12:21:06,166 INFO L226 Difference]: Without dead ends: 599 [2021-08-21 12:21:06,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 954.1ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:21:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-08-21 12:21:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 398. [2021-08-21 12:21:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.256926952141058) internal successors, (1293), 397 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1293 transitions. [2021-08-21 12:21:06,173 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1293 transitions. Word has length 17 [2021-08-21 12:21:06,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:06,173 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1293 transitions. [2021-08-21 12:21:06,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1293 transitions. [2021-08-21 12:21:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:06,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:06,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:06,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2021-08-21 12:21:06,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:06,374 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:06,374 INFO L82 PathProgramCache]: Analyzing trace with hash 60634429, now seen corresponding path program 63 times [2021-08-21 12:21:06,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:06,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032983052] [2021-08-21 12:21:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:06,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:06,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:06,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032983052] [2021-08-21 12:21:06,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032983052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:06,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638619463] [2021-08-21 12:21:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:06,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:06,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:06,795 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:06,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 12:21:11,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:21:11,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:11,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:21:11,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:11,318 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:11,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-08-21 12:21:11,596 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:11,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2021-08-21 12:21:11,602 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:11,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2021-08-21 12:21:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:11,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638619463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:11,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:11,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 12:21:11,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164081016] [2021-08-21 12:21:11,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:21:11,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:21:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:21:11,711 INFO L87 Difference]: Start difference. First operand 398 states and 1293 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:12,031 INFO L93 Difference]: Finished difference Result 473 states and 1496 transitions. [2021-08-21 12:21:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:21:12,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:12,032 INFO L225 Difference]: With dead ends: 473 [2021-08-21 12:21:12,032 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 12:21:12,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:21:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 12:21:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 400. [2021-08-21 12:21:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.255639097744361) internal successors, (1299), 399 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1299 transitions. [2021-08-21 12:21:12,037 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1299 transitions. Word has length 17 [2021-08-21 12:21:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:12,037 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1299 transitions. [2021-08-21 12:21:12,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1299 transitions. [2021-08-21 12:21:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:12,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:12,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:12,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-21 12:21:12,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:12,239 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:12,239 INFO L82 PathProgramCache]: Analyzing trace with hash -200014515, now seen corresponding path program 64 times [2021-08-21 12:21:12,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:12,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80159884] [2021-08-21 12:21:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:12,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:12,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:12,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80159884] [2021-08-21 12:21:12,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80159884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:12,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142325365] [2021-08-21 12:21:12,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:12,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:12,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:12,558 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:12,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 12:21:16,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:16,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:21:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:17,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 71 [2021-08-21 12:21:17,485 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:17,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 114 [2021-08-21 12:21:17,492 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 96 [2021-08-21 12:21:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:17,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142325365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:17,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:17,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:21:17,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823956984] [2021-08-21 12:21:17,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:17,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:17,684 INFO L87 Difference]: Start difference. First operand 400 states and 1299 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:18,070 INFO L93 Difference]: Finished difference Result 444 states and 1409 transitions. [2021-08-21 12:21:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:18,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:18,071 INFO L225 Difference]: With dead ends: 444 [2021-08-21 12:21:18,071 INFO L226 Difference]: Without dead ends: 440 [2021-08-21 12:21:18,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:21:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-21 12:21:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 401. [2021-08-21 12:21:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.2575) internal successors, (1303), 400 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1303 transitions. [2021-08-21 12:21:18,076 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1303 transitions. Word has length 17 [2021-08-21 12:21:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:18,076 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1303 transitions. [2021-08-21 12:21:18,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1303 transitions. [2021-08-21 12:21:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:18,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:18,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:18,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:18,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:18,278 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash -786956047, now seen corresponding path program 65 times [2021-08-21 12:21:18,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:18,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68323504] [2021-08-21 12:21:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:18,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:18,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:18,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68323504] [2021-08-21 12:21:18,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68323504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:18,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56715288] [2021-08-21 12:21:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:21:18,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:18,556 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:18,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 12:21:22,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:22,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:22,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:21:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:23,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2021-08-21 12:21:23,613 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:23,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 126 [2021-08-21 12:21:23,620 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 108 [2021-08-21 12:21:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:23,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56715288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:23,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:23,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:21:23,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059791215] [2021-08-21 12:21:23,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:23,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:23,872 INFO L87 Difference]: Start difference. First operand 401 states and 1303 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:24,556 INFO L93 Difference]: Finished difference Result 486 states and 1529 transitions. [2021-08-21 12:21:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:21:24,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:24,557 INFO L225 Difference]: With dead ends: 486 [2021-08-21 12:21:24,557 INFO L226 Difference]: Without dead ends: 476 [2021-08-21 12:21:24,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 745.6ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:21:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-08-21 12:21:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 404. [2021-08-21 12:21:24,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.26302729528536) internal successors, (1315), 403 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1315 transitions. [2021-08-21 12:21:24,562 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1315 transitions. Word has length 17 [2021-08-21 12:21:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:24,562 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1315 transitions. [2021-08-21 12:21:24,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1315 transitions. [2021-08-21 12:21:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:24,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:24,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:24,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-21 12:21:24,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-08-21 12:21:24,763 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:24,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2090788709, now seen corresponding path program 66 times [2021-08-21 12:21:24,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:24,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099292545] [2021-08-21 12:21:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:24,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:25,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099292545] [2021-08-21 12:21:25,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099292545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:25,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132700237] [2021-08-21 12:21:25,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:21:25,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:25,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:25,195 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:25,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 12:21:29,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:21:29,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:29,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:29,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:29,848 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 85 [2021-08-21 12:21:30,881 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:30,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2021-08-21 12:21:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 128 [2021-08-21 12:21:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:31,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132700237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:31,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:31,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:21:31,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541265847] [2021-08-21 12:21:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:21:31,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:21:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:31,088 INFO L87 Difference]: Start difference. First operand 404 states and 1315 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:32,166 INFO L93 Difference]: Finished difference Result 475 states and 1502 transitions. [2021-08-21 12:21:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:21:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:32,167 INFO L225 Difference]: With dead ends: 475 [2021-08-21 12:21:32,167 INFO L226 Difference]: Without dead ends: 465 [2021-08-21 12:21:32,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1119.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:21:32,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-08-21 12:21:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 406. [2021-08-21 12:21:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.2617283950617284) internal successors, (1321), 405 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1321 transitions. [2021-08-21 12:21:32,172 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1321 transitions. Word has length 17 [2021-08-21 12:21:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:32,172 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1321 transitions. [2021-08-21 12:21:32,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1321 transitions. [2021-08-21 12:21:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:32,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:32,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:32,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-21 12:21:32,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-21 12:21:32,373 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1210606757, now seen corresponding path program 67 times [2021-08-21 12:21:32,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:32,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303103224] [2021-08-21 12:21:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:32,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:33,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:33,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303103224] [2021-08-21 12:21:33,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303103224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:33,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942268887] [2021-08-21 12:21:33,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:21:33,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:33,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:33,053 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:33,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 12:21:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:37,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:21:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:37,771 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:37,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2021-08-21 12:21:37,914 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:37,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 107 [2021-08-21 12:21:37,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2021-08-21 12:21:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:38,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942268887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:38,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:38,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-21 12:21:38,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603552552] [2021-08-21 12:21:38,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:21:38,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:21:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:21:38,137 INFO L87 Difference]: Start difference. First operand 406 states and 1321 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:38,925 INFO L93 Difference]: Finished difference Result 479 states and 1511 transitions. [2021-08-21 12:21:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:21:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:38,927 INFO L225 Difference]: With dead ends: 479 [2021-08-21 12:21:38,927 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 12:21:38,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:21:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 12:21:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 411. [2021-08-21 12:21:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.265853658536585) internal successors, (1339), 410 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1339 transitions. [2021-08-21 12:21:38,931 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1339 transitions. Word has length 17 [2021-08-21 12:21:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:38,932 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1339 transitions. [2021-08-21 12:21:38,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1339 transitions. [2021-08-21 12:21:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:38,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:38,932 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:38,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-21 12:21:39,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:39,133 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -199210725, now seen corresponding path program 68 times [2021-08-21 12:21:39,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:39,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231226229] [2021-08-21 12:21:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:39,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:39,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:39,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231226229] [2021-08-21 12:21:39,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231226229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:39,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536149973] [2021-08-21 12:21:39,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:21:39,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:39,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:39,579 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:39,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 12:21:44,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:21:44,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:44,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:21:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:44,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-08-21 12:21:44,461 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:44,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 86 [2021-08-21 12:21:44,467 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 70 [2021-08-21 12:21:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536149973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:44,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:44,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:21:44,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828754065] [2021-08-21 12:21:44,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:21:44,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:21:44,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:21:44,655 INFO L87 Difference]: Start difference. First operand 411 states and 1339 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:45,297 INFO L93 Difference]: Finished difference Result 477 states and 1516 transitions. [2021-08-21 12:21:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:21:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:45,298 INFO L225 Difference]: With dead ends: 477 [2021-08-21 12:21:45,299 INFO L226 Difference]: Without dead ends: 467 [2021-08-21 12:21:45,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:21:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-21 12:21:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 413. [2021-08-21 12:21:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.2645631067961167) internal successors, (1345), 412 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1345 transitions. [2021-08-21 12:21:45,305 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1345 transitions. Word has length 17 [2021-08-21 12:21:45,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:45,305 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1345 transitions. [2021-08-21 12:21:45,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1345 transitions. [2021-08-21 12:21:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:45,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:45,306 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:45,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:45,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-08-21 12:21:45,506 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash 143372787, now seen corresponding path program 69 times [2021-08-21 12:21:45,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:45,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563988675] [2021-08-21 12:21:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:45,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:45,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:45,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563988675] [2021-08-21 12:21:45,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563988675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:45,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952933196] [2021-08-21 12:21:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:21:45,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:45,973 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:45,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 12:21:50,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:21:50,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:50,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:21:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:50,885 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:50,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 97 [2021-08-21 12:21:51,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 154 [2021-08-21 12:21:51,313 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:51,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 131 [2021-08-21 12:21:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:52,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952933196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:52,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:52,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:21:52,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329214839] [2021-08-21 12:21:52,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:52,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:52,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:52,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:52,401 INFO L87 Difference]: Start difference. First operand 413 states and 1345 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:21:53,019 INFO L93 Difference]: Finished difference Result 475 states and 1510 transitions. [2021-08-21 12:21:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:21:53,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:21:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:21:53,020 INFO L225 Difference]: With dead ends: 475 [2021-08-21 12:21:53,020 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 12:21:53,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 735.4ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:21:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 12:21:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 411. [2021-08-21 12:21:53,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.265853658536585) internal successors, (1339), 410 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1339 transitions. [2021-08-21 12:21:53,025 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1339 transitions. Word has length 17 [2021-08-21 12:21:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:21:53,025 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1339 transitions. [2021-08-21 12:21:53,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:21:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1339 transitions. [2021-08-21 12:21:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:21:53,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:21:53,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:21:53,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2021-08-21 12:21:53,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-21 12:21:53,241 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:21:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:21:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1204990429, now seen corresponding path program 70 times [2021-08-21 12:21:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:21:53,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871825027] [2021-08-21 12:21:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:21:53,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:21:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:21:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:53,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:21:53,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871825027] [2021-08-21 12:21:53,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871825027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:53,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198131225] [2021-08-21 12:21:53,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:21:53,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:21:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:21:53,771 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:21:53,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 12:21:58,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:21:58,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:21:58,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:21:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:21:58,715 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:58,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:21:59,151 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:21:59,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2021-08-21 12:21:59,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 74 [2021-08-21 12:21:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:21:59,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198131225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:21:59,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:21:59,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:21:59,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019320196] [2021-08-21 12:21:59,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:21:59,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:21:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:21:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:21:59,304 INFO L87 Difference]: Start difference. First operand 411 states and 1339 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:00,241 INFO L93 Difference]: Finished difference Result 512 states and 1629 transitions. [2021-08-21 12:22:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:22:00,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:00,242 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:22:00,242 INFO L226 Difference]: Without dead ends: 502 [2021-08-21 12:22:00,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 866.9ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-21 12:22:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 415. [2021-08-21 12:22:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.263285024154589) internal successors, (1351), 414 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1351 transitions. [2021-08-21 12:22:00,248 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1351 transitions. Word has length 17 [2021-08-21 12:22:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:00,248 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1351 transitions. [2021-08-21 12:22:00,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1351 transitions. [2021-08-21 12:22:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:00,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:00,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:00,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-21 12:22:00,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:00,449 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2096405037, now seen corresponding path program 71 times [2021-08-21 12:22:00,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:00,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390106888] [2021-08-21 12:22:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:00,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:00,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:00,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390106888] [2021-08-21 12:22:00,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390106888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:00,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130322804] [2021-08-21 12:22:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:22:00,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:00,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:00,944 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:00,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 12:22:05,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:22:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:22:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:05,876 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:05,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:22:06,051 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:06,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 98 [2021-08-21 12:22:06,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2021-08-21 12:22:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:06,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130322804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:06,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:06,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-21 12:22:06,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082839525] [2021-08-21 12:22:06,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:06,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:06,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:06,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:06,330 INFO L87 Difference]: Start difference. First operand 415 states and 1351 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:06,978 INFO L93 Difference]: Finished difference Result 526 states and 1675 transitions. [2021-08-21 12:22:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:22:06,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:06,979 INFO L225 Difference]: With dead ends: 526 [2021-08-21 12:22:06,979 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 12:22:06,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:22:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 12:22:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 419. [2021-08-21 12:22:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.2679425837320575) internal successors, (1366), 418 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1366 transitions. [2021-08-21 12:22:06,984 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1366 transitions. Word has length 17 [2021-08-21 12:22:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:06,984 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1366 transitions. [2021-08-21 12:22:06,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1366 transitions. [2021-08-21 12:22:06,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:06,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:06,985 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:07,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-21 12:22:07,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-08-21 12:22:07,185 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1177992399, now seen corresponding path program 72 times [2021-08-21 12:22:07,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:07,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408511884] [2021-08-21 12:22:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:07,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:07,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408511884] [2021-08-21 12:22:07,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408511884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006094462] [2021-08-21 12:22:07,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:07,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:07,588 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:07,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 12:22:12,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:22:12,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:22:12,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:12,581 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:12,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:22:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 128 [2021-08-21 12:22:12,962 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:12,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 113 [2021-08-21 12:22:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:14,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006094462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:14,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:14,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:22:14,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102255522] [2021-08-21 12:22:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:14,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:14,072 INFO L87 Difference]: Start difference. First operand 419 states and 1366 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:14,846 INFO L93 Difference]: Finished difference Result 572 states and 1819 transitions. [2021-08-21 12:22:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:22:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:14,848 INFO L225 Difference]: With dead ends: 572 [2021-08-21 12:22:14,848 INFO L226 Difference]: Without dead ends: 560 [2021-08-21 12:22:14,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 808.0ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:22:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-21 12:22:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 418. [2021-08-21 12:22:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.2709832134292567) internal successors, (1364), 417 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1364 transitions. [2021-08-21 12:22:14,853 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1364 transitions. Word has length 17 [2021-08-21 12:22:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:14,853 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1364 transitions. [2021-08-21 12:22:14,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1364 transitions. [2021-08-21 12:22:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:14,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:14,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:14,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-08-21 12:22:15,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:15,055 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:15,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:15,055 INFO L82 PathProgramCache]: Analyzing trace with hash 398125933, now seen corresponding path program 73 times [2021-08-21 12:22:15,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:15,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471848587] [2021-08-21 12:22:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:15,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:15,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:15,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471848587] [2021-08-21 12:22:15,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471848587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:15,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262144444] [2021-08-21 12:22:15,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:22:15,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:15,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:15,319 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:15,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 12:22:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:20,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:22:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:20,386 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2021-08-21 12:22:20,725 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:20,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 92 [2021-08-21 12:22:20,732 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:20,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 70 [2021-08-21 12:22:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:20,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262144444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:20,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:20,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-21 12:22:20,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766847819] [2021-08-21 12:22:20,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:22:20,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:22:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:22:20,898 INFO L87 Difference]: Start difference. First operand 418 states and 1364 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:21,522 INFO L93 Difference]: Finished difference Result 511 states and 1624 transitions. [2021-08-21 12:22:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:22:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:21,523 INFO L225 Difference]: With dead ends: 511 [2021-08-21 12:22:21,523 INFO L226 Difference]: Without dead ends: 501 [2021-08-21 12:22:21,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:22:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-21 12:22:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 422. [2021-08-21 12:22:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.2684085510688834) internal successors, (1376), 421 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1376 transitions. [2021-08-21 12:22:21,528 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1376 transitions. Word has length 17 [2021-08-21 12:22:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:21,528 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1376 transitions. [2021-08-21 12:22:21,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1376 transitions. [2021-08-21 12:22:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:21,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:21,529 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:21,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:21,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:21,729 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash 740709445, now seen corresponding path program 74 times [2021-08-21 12:22:21,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:21,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209536850] [2021-08-21 12:22:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:21,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:22,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:22,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209536850] [2021-08-21 12:22:22,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209536850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:22,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847993531] [2021-08-21 12:22:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:22:22,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:22,465 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:22,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 12:22:27,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:22:27,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:27,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:22:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:27,604 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:27,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 82 [2021-08-21 12:22:28,142 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:28,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 143 [2021-08-21 12:22:28,149 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:28,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 121 [2021-08-21 12:22:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:28,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847993531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:28,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:28,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:22:28,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253759662] [2021-08-21 12:22:28,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:22:28,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:22:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:22:28,741 INFO L87 Difference]: Start difference. First operand 422 states and 1376 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:29,713 INFO L93 Difference]: Finished difference Result 503 states and 1600 transitions. [2021-08-21 12:22:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:22:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:29,715 INFO L225 Difference]: With dead ends: 503 [2021-08-21 12:22:29,715 INFO L226 Difference]: Without dead ends: 492 [2021-08-21 12:22:29,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1021.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:22:29,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-21 12:22:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 422. [2021-08-21 12:22:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.2684085510688834) internal successors, (1376), 421 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1376 transitions. [2021-08-21 12:22:29,720 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1376 transitions. Word has length 17 [2021-08-21 12:22:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:29,720 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1376 transitions. [2021-08-21 12:22:29,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1376 transitions. [2021-08-21 12:22:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:29,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:29,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:29,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:29,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:29,921 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:29,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1366074675, now seen corresponding path program 75 times [2021-08-21 12:22:29,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:29,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34016463] [2021-08-21 12:22:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:29,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:30,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:30,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34016463] [2021-08-21 12:22:30,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34016463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:30,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295409538] [2021-08-21 12:22:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:22:30,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:30,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:30,208 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:30,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 12:22:35,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:22:35,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 12:22:35,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:35,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:22:35,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2021-08-21 12:22:35,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 143 [2021-08-21 12:22:35,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:22:35,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 117 [2021-08-21 12:22:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:37,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295409538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:37,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:37,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 12:22:37,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070695653] [2021-08-21 12:22:37,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:22:37,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:22:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:22:37,816 INFO L87 Difference]: Start difference. First operand 422 states and 1376 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:38,957 INFO L93 Difference]: Finished difference Result 579 states and 1811 transitions. [2021-08-21 12:22:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:22:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:38,958 INFO L225 Difference]: With dead ends: 579 [2021-08-21 12:22:38,958 INFO L226 Difference]: Without dead ends: 557 [2021-08-21 12:22:38,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1374.6ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:22:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-21 12:22:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 427. [2021-08-21 12:22:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.288732394366197) internal successors, (1401), 426 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1401 transitions. [2021-08-21 12:22:38,964 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1401 transitions. Word has length 17 [2021-08-21 12:22:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1401 transitions. [2021-08-21 12:22:38,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1401 transitions. [2021-08-21 12:22:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:38,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:38,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:38,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:39,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:39,165 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:39,165 INFO L82 PathProgramCache]: Analyzing trace with hash -177078601, now seen corresponding path program 76 times [2021-08-21 12:22:39,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:39,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356553045] [2021-08-21 12:22:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:39,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:39,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:39,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356553045] [2021-08-21 12:22:39,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356553045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:39,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057419433] [2021-08-21 12:22:39,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:22:39,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:39,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:39,555 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:39,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 12:22:44,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:22:44,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:22:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:44,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-08-21 12:22:44,968 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:44,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:22:44,974 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:44,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2021-08-21 12:22:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057419433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:45,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:45,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:22:45,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822925179] [2021-08-21 12:22:45,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:22:45,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:45,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:22:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:22:45,088 INFO L87 Difference]: Start difference. First operand 427 states and 1401 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:46,592 INFO L93 Difference]: Finished difference Result 518 states and 1640 transitions. [2021-08-21 12:22:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:22:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:46,593 INFO L225 Difference]: With dead ends: 518 [2021-08-21 12:22:46,593 INFO L226 Difference]: Without dead ends: 506 [2021-08-21 12:22:46,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1446.4ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:22:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-21 12:22:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 427. [2021-08-21 12:22:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.288732394366197) internal successors, (1401), 426 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1401 transitions. [2021-08-21 12:22:46,598 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1401 transitions. Word has length 17 [2021-08-21 12:22:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1401 transitions. [2021-08-21 12:22:46,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1401 transitions. [2021-08-21 12:22:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:46,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:46,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:46,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-21 12:22:46,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:46,800 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:46,800 INFO L82 PathProgramCache]: Analyzing trace with hash -437727545, now seen corresponding path program 77 times [2021-08-21 12:22:46,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:46,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994810946] [2021-08-21 12:22:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:46,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:47,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:47,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994810946] [2021-08-21 12:22:47,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994810946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:47,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400931292] [2021-08-21 12:22:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:22:47,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:47,053 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:47,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 12:22:52,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:22:52,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:52,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:22:52,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:52,387 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:52,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:22:52,526 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:52,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 97 [2021-08-21 12:22:52,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2021-08-21 12:22:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:52,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400931292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:52,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:22:52,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:22:52,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118704704] [2021-08-21 12:22:52,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:22:52,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:22:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:22:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:22:52,724 INFO L87 Difference]: Start difference. First operand 427 states and 1401 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:53,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:22:53,768 INFO L93 Difference]: Finished difference Result 518 states and 1643 transitions. [2021-08-21 12:22:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:22:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:22:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:22:53,770 INFO L225 Difference]: With dead ends: 518 [2021-08-21 12:22:53,770 INFO L226 Difference]: Without dead ends: 502 [2021-08-21 12:22:53,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 908.7ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:22:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-21 12:22:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 429. [2021-08-21 12:22:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2850467289719627) internal successors, (1406), 428 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1406 transitions. [2021-08-21 12:22:53,775 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1406 transitions. Word has length 17 [2021-08-21 12:22:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:22:53,775 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1406 transitions. [2021-08-21 12:22:53,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:22:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1406 transitions. [2021-08-21 12:22:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:22:53,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:22:53,776 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:22:53,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-21 12:22:53,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-08-21 12:22:53,976 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:22:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:22:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1753884849, now seen corresponding path program 78 times [2021-08-21 12:22:53,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:22:53,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133439752] [2021-08-21 12:22:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:22:53,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:22:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:22:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:22:54,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:22:54,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133439752] [2021-08-21 12:22:54,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133439752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:22:54,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13090706] [2021-08-21 12:22:54,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:22:54,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:22:54,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:22:54,353 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:22:54,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 12:22:59,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:22:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:22:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:22:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:22:59,808 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:22:59,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 79 [2021-08-21 12:23:00,104 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:00,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 110 [2021-08-21 12:23:00,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 91 [2021-08-21 12:23:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:00,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13090706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:00,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:00,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:23:00,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82822996] [2021-08-21 12:23:00,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:00,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:00,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:00,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:00,418 INFO L87 Difference]: Start difference. First operand 429 states and 1406 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:01,183 INFO L93 Difference]: Finished difference Result 532 states and 1663 transitions. [2021-08-21 12:23:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:23:01,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:01,185 INFO L225 Difference]: With dead ends: 532 [2021-08-21 12:23:01,185 INFO L226 Difference]: Without dead ends: 522 [2021-08-21 12:23:01,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 719.0ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:23:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-21 12:23:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 427. [2021-08-21 12:23:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.288732394366197) internal successors, (1401), 426 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1401 transitions. [2021-08-21 12:23:01,191 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1401 transitions. Word has length 17 [2021-08-21 12:23:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:01,191 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1401 transitions. [2021-08-21 12:23:01,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1401 transitions. [2021-08-21 12:23:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:01,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:01,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:01,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2021-08-21 12:23:01,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-08-21 12:23:01,392 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:01,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1525764139, now seen corresponding path program 79 times [2021-08-21 12:23:01,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:01,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330971565] [2021-08-21 12:23:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:01,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:01,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:01,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330971565] [2021-08-21 12:23:01,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330971565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:01,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578375154] [2021-08-21 12:23:01,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:23:01,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:01,746 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:01,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 12:23:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:07,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:23:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:07,155 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:07,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2021-08-21 12:23:07,545 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:07,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 97 [2021-08-21 12:23:07,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2021-08-21 12:23:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:07,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578375154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:07,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:07,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:23:07,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739128635] [2021-08-21 12:23:07,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:23:07,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:23:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:23:07,742 INFO L87 Difference]: Start difference. First operand 427 states and 1401 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:09,160 INFO L93 Difference]: Finished difference Result 618 states and 1915 transitions. [2021-08-21 12:23:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:23:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:09,162 INFO L225 Difference]: With dead ends: 618 [2021-08-21 12:23:09,162 INFO L226 Difference]: Without dead ends: 602 [2021-08-21 12:23:09,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1178.3ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:23:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-08-21 12:23:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 427. [2021-08-21 12:23:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.288732394366197) internal successors, (1401), 426 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1401 transitions. [2021-08-21 12:23:09,168 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1401 transitions. Word has length 17 [2021-08-21 12:23:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:09,168 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1401 transitions. [2021-08-21 12:23:09,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1401 transitions. [2021-08-21 12:23:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:09,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:09,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:09,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-08-21 12:23:09,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-21 12:23:09,369 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 691624753, now seen corresponding path program 80 times [2021-08-21 12:23:09,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:09,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820324062] [2021-08-21 12:23:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:09,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:09,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:09,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820324062] [2021-08-21 12:23:09,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820324062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:09,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298114643] [2021-08-21 12:23:09,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:09,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:09,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:09,807 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:09,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 12:23:15,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:23:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:15,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-08-21 12:23:15,441 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:15,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:23:15,447 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2021-08-21 12:23:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:15,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298114643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:15,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:15,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:23:15,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745486915] [2021-08-21 12:23:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:15,584 INFO L87 Difference]: Start difference. First operand 427 states and 1401 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:15,940 INFO L93 Difference]: Finished difference Result 493 states and 1576 transitions. [2021-08-21 12:23:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:23:15,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:15,941 INFO L225 Difference]: With dead ends: 493 [2021-08-21 12:23:15,941 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:23:15,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:23:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 427. [2021-08-21 12:23:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.288732394366197) internal successors, (1401), 426 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1401 transitions. [2021-08-21 12:23:15,947 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1401 transitions. Word has length 17 [2021-08-21 12:23:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:15,947 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1401 transitions. [2021-08-21 12:23:15,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1401 transitions. [2021-08-21 12:23:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:15,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:15,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:15,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:16,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-08-21 12:23:16,148 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 430975809, now seen corresponding path program 81 times [2021-08-21 12:23:16,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:16,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719745282] [2021-08-21 12:23:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:16,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:16,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:16,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719745282] [2021-08-21 12:23:16,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719745282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:16,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901405735] [2021-08-21 12:23:16,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:23:16,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:16,509 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:16,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 12:23:21,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:23:21,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:23:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:22,155 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:22,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 91 [2021-08-21 12:23:22,464 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:22,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 131 [2021-08-21 12:23:22,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 110 [2021-08-21 12:23:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:22,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901405735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:22,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:22,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:23:22,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308190146] [2021-08-21 12:23:22,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:22,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:22,801 INFO L87 Difference]: Start difference. First operand 427 states and 1401 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:23,153 INFO L93 Difference]: Finished difference Result 464 states and 1489 transitions. [2021-08-21 12:23:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:23:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:23,154 INFO L225 Difference]: With dead ends: 464 [2021-08-21 12:23:23,154 INFO L226 Difference]: Without dead ends: 460 [2021-08-21 12:23:23,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:23:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-21 12:23:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 428. [2021-08-21 12:23:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.2903981264637) internal successors, (1405), 427 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1405 transitions. [2021-08-21 12:23:23,159 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1405 transitions. Word has length 17 [2021-08-21 12:23:23,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:23,159 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1405 transitions. [2021-08-21 12:23:23,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1405 transitions. [2021-08-21 12:23:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:23,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:23,165 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 12:23:23,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-21 12:23:23,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-08-21 12:23:23,389 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash -155965723, now seen corresponding path program 82 times [2021-08-21 12:23:23,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:23,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779376528] [2021-08-21 12:23:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:23,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:23,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:23,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779376528] [2021-08-21 12:23:23,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779376528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:23,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96415473] [2021-08-21 12:23:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:23:23,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:23,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:23,727 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:23,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 12:23:29,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:23:29,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:23:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:29,231 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:29,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-08-21 12:23:29,488 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:29,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 86 [2021-08-21 12:23:29,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2021-08-21 12:23:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:29,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96415473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:29,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:29,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:23:29,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290897604] [2021-08-21 12:23:29,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:23:29,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:23:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:23:29,668 INFO L87 Difference]: Start difference. First operand 428 states and 1405 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:29,985 INFO L93 Difference]: Finished difference Result 502 states and 1599 transitions. [2021-08-21 12:23:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:23:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:29,986 INFO L225 Difference]: With dead ends: 502 [2021-08-21 12:23:29,986 INFO L226 Difference]: Without dead ends: 492 [2021-08-21 12:23:29,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:23:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-08-21 12:23:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 428. [2021-08-21 12:23:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.2903981264637) internal successors, (1405), 427 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1405 transitions. [2021-08-21 12:23:29,992 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1405 transitions. Word has length 17 [2021-08-21 12:23:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:29,992 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1405 transitions. [2021-08-21 12:23:29,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1405 transitions. [2021-08-21 12:23:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:29,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:29,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:30,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:30,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:30,197 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1573188263, now seen corresponding path program 83 times [2021-08-21 12:23:30,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:30,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853793919] [2021-08-21 12:23:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:30,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:30,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:30,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853793919] [2021-08-21 12:23:30,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853793919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:30,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663105265] [2021-08-21 12:23:30,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:23:30,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:30,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:30,671 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:30,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 12:23:35,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:23:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:35,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:23:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:36,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-08-21 12:23:36,368 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:36,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:23:36,374 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:36,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2021-08-21 12:23:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:36,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663105265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:36,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:36,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:23:36,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437424616] [2021-08-21 12:23:36,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:23:36,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:23:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:23:36,489 INFO L87 Difference]: Start difference. First operand 428 states and 1405 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:37,135 INFO L93 Difference]: Finished difference Result 484 states and 1546 transitions. [2021-08-21 12:23:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:23:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:37,136 INFO L225 Difference]: With dead ends: 484 [2021-08-21 12:23:37,136 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:23:37,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 707.9ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:23:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:23:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 427. [2021-08-21 12:23:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.2863849765258215) internal successors, (1400), 426 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 12:23:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1400 transitions. [2021-08-21 12:23:37,141 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1400 transitions. Word has length 17 [2021-08-21 12:23:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:37,141 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1400 transitions. [2021-08-21 12:23:37,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1400 transitions. [2021-08-21 12:23:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:37,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:37,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:37,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:37,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:37,342 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash -579616433, now seen corresponding path program 84 times [2021-08-21 12:23:37,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:37,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745730124] [2021-08-21 12:23:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:37,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:38,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:38,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745730124] [2021-08-21 12:23:38,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745730124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:38,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905852778] [2021-08-21 12:23:38,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:23:38,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:38,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:38,011 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:38,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 12:23:43,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:23:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:23:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:43,708 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:43,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 81 [2021-08-21 12:23:43,921 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 137 [2021-08-21 12:23:43,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 112 [2021-08-21 12:23:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905852778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:44,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:44,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 12:23:44,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777128590] [2021-08-21 12:23:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:23:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:23:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:23:44,535 INFO L87 Difference]: Start difference. First operand 427 states and 1400 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 12:23:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:45,429 INFO L93 Difference]: Finished difference Result 509 states and 1613 transitions. [2021-08-21 12:23:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:23:45,430 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 17 [2021-08-21 12:23:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:45,431 INFO L225 Difference]: With dead ends: 509 [2021-08-21 12:23:45,431 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 12:23:45,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:23:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 12:23:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 430. [2021-08-21 12:23:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.296037296037296) internal successors, (1414), 429 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1414 transitions. [2021-08-21 12:23:45,436 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1414 transitions. Word has length 17 [2021-08-21 12:23:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:45,437 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1414 transitions. [2021-08-21 12:23:45,437 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 12:23:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1414 transitions. [2021-08-21 12:23:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:45,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:45,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:45,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-21 12:23:45,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:45,649 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash 431779599, now seen corresponding path program 85 times [2021-08-21 12:23:45,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:45,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427811287] [2021-08-21 12:23:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:45,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:46,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:46,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427811287] [2021-08-21 12:23:46,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427811287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:46,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278681267] [2021-08-21 12:23:46,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:23:46,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:46,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:46,104 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:46,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 12:23:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:51,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:23:51,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:51,704 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:51,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:23:51,986 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:51,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 92 [2021-08-21 12:23:51,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 73 [2021-08-21 12:23:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:52,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278681267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:52,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:23:52,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:23:52,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282735822] [2021-08-21 12:23:52,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:23:52,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:23:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:23:52,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:23:52,182 INFO L87 Difference]: Start difference. First operand 430 states and 1414 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:23:52,770 INFO L93 Difference]: Finished difference Result 489 states and 1569 transitions. [2021-08-21 12:23:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:23:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:23:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:23:52,771 INFO L225 Difference]: With dead ends: 489 [2021-08-21 12:23:52,771 INFO L226 Difference]: Without dead ends: 479 [2021-08-21 12:23:52,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:23:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-21 12:23:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 432. [2021-08-21 12:23:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.2946635730858467) internal successors, (1420), 431 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1420 transitions. [2021-08-21 12:23:52,776 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1420 transitions. Word has length 17 [2021-08-21 12:23:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:23:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1420 transitions. [2021-08-21 12:23:52,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:23:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1420 transitions. [2021-08-21 12:23:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:23:52,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:23:52,777 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:23:52,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 12:23:52,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:52,978 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:23:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:23:52,978 INFO L82 PathProgramCache]: Analyzing trace with hash 774363111, now seen corresponding path program 86 times [2021-08-21 12:23:52,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:23:52,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827491244] [2021-08-21 12:23:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:23:52,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:23:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:23:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:23:53,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:23:53,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827491244] [2021-08-21 12:23:53,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827491244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:23:53,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173315263] [2021-08-21 12:23:53,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:23:53,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:23:53,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:23:53,359 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:23:53,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 12:23:58,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:23:58,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:23:58,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:23:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:23:59,090 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:59,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 96 [2021-08-21 12:23:59,422 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:23:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 159 [2021-08-21 12:23:59,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 130 [2021-08-21 12:24:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:00,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173315263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:00,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:00,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:24:00,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881268906] [2021-08-21 12:24:00,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:00,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:00,302 INFO L87 Difference]: Start difference. First operand 432 states and 1420 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 12:24:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:01,064 INFO L93 Difference]: Finished difference Result 487 states and 1563 transitions. [2021-08-21 12:24:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:24:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:01,066 INFO L225 Difference]: With dead ends: 487 [2021-08-21 12:24:01,066 INFO L226 Difference]: Without dead ends: 476 [2021-08-21 12:24:01,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 703.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:24:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-08-21 12:24:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 430. [2021-08-21 12:24:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.296037296037296) internal successors, (1414), 429 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1414 transitions. [2021-08-21 12:24:01,071 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1414 transitions. Word has length 17 [2021-08-21 12:24:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:01,071 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1414 transitions. [2021-08-21 12:24:01,071 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 12:24:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1414 transitions. [2021-08-21 12:24:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:01,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:01,071 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 12:24:01,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-21 12:24:01,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:01,272 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1728967359, now seen corresponding path program 87 times [2021-08-21 12:24:01,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:01,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674675433] [2021-08-21 12:24:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:01,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:01,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:01,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674675433] [2021-08-21 12:24:01,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674675433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:01,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576887528] [2021-08-21 12:24:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:24:01,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:01,660 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:01,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 12:24:07,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:24:07,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:07,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 12:24:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:07,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:24:07,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 75 [2021-08-21 12:24:07,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:24:07,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 149 [2021-08-21 12:24:07,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 123 [2021-08-21 12:24:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:09,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576887528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:09,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:09,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:24:09,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263189002] [2021-08-21 12:24:09,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:09,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:09,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:09,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:09,080 INFO L87 Difference]: Start difference. First operand 430 states and 1414 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 12:24:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:10,669 INFO L93 Difference]: Finished difference Result 580 states and 1853 transitions. [2021-08-21 12:24:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:24:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:10,671 INFO L225 Difference]: With dead ends: 580 [2021-08-21 12:24:10,671 INFO L226 Difference]: Without dead ends: 564 [2021-08-21 12:24:10,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1597.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:24:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-08-21 12:24:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 432. [2021-08-21 12:24:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.2946635730858467) internal successors, (1420), 431 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1420 transitions. [2021-08-21 12:24:10,677 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1420 transitions. Word has length 17 [2021-08-21 12:24:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:10,677 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1420 transitions. [2021-08-21 12:24:10,677 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 12:24:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1420 transitions. [2021-08-21 12:24:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:10,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:10,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:10,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-21 12:24:10,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:10,878 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash -454018681, now seen corresponding path program 88 times [2021-08-21 12:24:10,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:10,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466708320] [2021-08-21 12:24:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:10,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:11,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:11,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466708320] [2021-08-21 12:24:11,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466708320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:11,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10637910] [2021-08-21 12:24:11,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:24:11,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:11,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:11,131 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:11,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 12:24:16,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:24:16,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:24:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:16,999 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:16,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-08-21 12:24:17,282 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 86 [2021-08-21 12:24:17,285 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 77 treesize of output 61 [2021-08-21 12:24:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:17,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10637910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:17,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:17,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:24:17,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739720700] [2021-08-21 12:24:17,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:24:17,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:24:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:24:17,440 INFO L87 Difference]: Start difference. First operand 432 states and 1420 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:17,883 INFO L93 Difference]: Finished difference Result 520 states and 1668 transitions. [2021-08-21 12:24:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:24:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:17,884 INFO L225 Difference]: With dead ends: 520 [2021-08-21 12:24:17,884 INFO L226 Difference]: Without dead ends: 510 [2021-08-21 12:24:17,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:24:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-21 12:24:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 434. [2021-08-21 12:24:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.2933025404157044) internal successors, (1426), 433 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1426 transitions. [2021-08-21 12:24:17,889 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1426 transitions. Word has length 17 [2021-08-21 12:24:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:17,889 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1426 transitions. [2021-08-21 12:24:17,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1426 transitions. [2021-08-21 12:24:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:17,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:17,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:17,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-21 12:24:18,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-08-21 12:24:18,091 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:18,091 INFO L82 PathProgramCache]: Analyzing trace with hash -111435169, now seen corresponding path program 89 times [2021-08-21 12:24:18,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:18,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249987364] [2021-08-21 12:24:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:18,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:18,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:18,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249987364] [2021-08-21 12:24:18,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249987364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:18,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331479256] [2021-08-21 12:24:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:24:18,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:18,829 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:18,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 12:24:24,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:24:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:24:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:24,788 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:24,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2021-08-21 12:24:25,065 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:25,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 140 [2021-08-21 12:24:25,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 115 [2021-08-21 12:24:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:25,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331479256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:25,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:25,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:24:25,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477505951] [2021-08-21 12:24:25,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:24:25,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:24:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:24:25,718 INFO L87 Difference]: Start difference. First operand 434 states and 1426 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:26,872 INFO L93 Difference]: Finished difference Result 510 states and 1636 transitions. [2021-08-21 12:24:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:24:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:26,874 INFO L225 Difference]: With dead ends: 510 [2021-08-21 12:24:26,874 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 12:24:26,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1178.1ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:24:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 12:24:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 432. [2021-08-21 12:24:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.2993039443155454) internal successors, (1422), 431 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1422 transitions. [2021-08-21 12:24:26,879 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1422 transitions. Word has length 17 [2021-08-21 12:24:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:26,879 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1422 transitions. [2021-08-21 12:24:26,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1422 transitions. [2021-08-21 12:24:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:26,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:26,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:26,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-21 12:24:27,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-08-21 12:24:27,080 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:27,080 INFO L82 PathProgramCache]: Analyzing trace with hash -575832425, now seen corresponding path program 90 times [2021-08-21 12:24:27,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:27,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647798972] [2021-08-21 12:24:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:27,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:27,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:27,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647798972] [2021-08-21 12:24:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647798972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:27,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948607679] [2021-08-21 12:24:27,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:24:27,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:27,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:27,509 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:27,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 12:24:33,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:24:33,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:33,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:24:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:33,423 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:33,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-08-21 12:24:33,694 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:33,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2021-08-21 12:24:33,701 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:33,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2021-08-21 12:24:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948607679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:33,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:33,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 12:24:33,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478710361] [2021-08-21 12:24:33,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:24:33,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:24:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:24:33,827 INFO L87 Difference]: Start difference. First operand 432 states and 1422 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:34,181 INFO L93 Difference]: Finished difference Result 507 states and 1624 transitions. [2021-08-21 12:24:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:24:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:34,182 INFO L225 Difference]: With dead ends: 507 [2021-08-21 12:24:34,182 INFO L226 Difference]: Without dead ends: 497 [2021-08-21 12:24:34,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:24:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-08-21 12:24:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 432. [2021-08-21 12:24:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.2993039443155454) internal successors, (1422), 431 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1422 transitions. [2021-08-21 12:24:34,188 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1422 transitions. Word has length 17 [2021-08-21 12:24:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:34,188 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1422 transitions. [2021-08-21 12:24:34,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1422 transitions. [2021-08-21 12:24:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:34,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:34,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:34,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-21 12:24:34,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-21 12:24:34,389 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash -836481369, now seen corresponding path program 91 times [2021-08-21 12:24:34,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:34,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192626972] [2021-08-21 12:24:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:34,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:34,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:34,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192626972] [2021-08-21 12:24:34,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192626972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:34,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415958448] [2021-08-21 12:24:34,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:24:34,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:34,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:34,708 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:34,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 12:24:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:24:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:40,888 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:40,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 86 [2021-08-21 12:24:41,159 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:41,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 107 [2021-08-21 12:24:41,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 88 [2021-08-21 12:24:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:41,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415958448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:41,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:41,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:24:41,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227182200] [2021-08-21 12:24:41,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:24:41,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:24:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:24:41,444 INFO L87 Difference]: Start difference. First operand 432 states and 1422 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 12:24:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:41,800 INFO L93 Difference]: Finished difference Result 478 states and 1537 transitions. [2021-08-21 12:24:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:24:41,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:41,801 INFO L225 Difference]: With dead ends: 478 [2021-08-21 12:24:41,801 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:24:41,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:24:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:24:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 433. [2021-08-21 12:24:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.300925925925926) internal successors, (1426), 432 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1426 transitions. [2021-08-21 12:24:41,806 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1426 transitions. Word has length 17 [2021-08-21 12:24:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:41,806 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1426 transitions. [2021-08-21 12:24:41,806 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 12:24:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1426 transitions. [2021-08-21 12:24:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:41,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:41,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:41,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-21 12:24:42,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-08-21 12:24:42,009 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1423422901, now seen corresponding path program 92 times [2021-08-21 12:24:42,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:42,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888903693] [2021-08-21 12:24:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:42,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:42,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:42,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888903693] [2021-08-21 12:24:42,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888903693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:42,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053565708] [2021-08-21 12:24:42,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:24:42,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:42,281 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:42,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 12:24:48,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:24:48,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:24:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:48,376 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:48,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2021-08-21 12:24:48,655 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:48,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 92 [2021-08-21 12:24:48,661 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:48,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 70 [2021-08-21 12:24:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053565708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:48,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:48,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-21 12:24:48,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882334886] [2021-08-21 12:24:48,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:24:48,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:48,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:24:48,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:24:48,835 INFO L87 Difference]: Start difference. First operand 433 states and 1426 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:49,301 INFO L93 Difference]: Finished difference Result 580 states and 1815 transitions. [2021-08-21 12:24:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:24:49,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:49,303 INFO L225 Difference]: With dead ends: 580 [2021-08-21 12:24:49,303 INFO L226 Difference]: Without dead ends: 560 [2021-08-21 12:24:49,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:24:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-21 12:24:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 443. [2021-08-21 12:24:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.341628959276018) internal successors, (1477), 442 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1477 transitions. [2021-08-21 12:24:49,308 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1477 transitions. Word has length 17 [2021-08-21 12:24:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:49,308 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1477 transitions. [2021-08-21 12:24:49,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1477 transitions. [2021-08-21 12:24:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:49,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:49,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:49,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-21 12:24:49,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:49,510 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1454321855, now seen corresponding path program 93 times [2021-08-21 12:24:49,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:49,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700493753] [2021-08-21 12:24:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:49,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:49,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:49,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700493753] [2021-08-21 12:24:49,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700493753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:49,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227909094] [2021-08-21 12:24:49,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:24:49,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:49,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:49,906 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:49,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 12:24:55,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:24:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:24:55,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 12:24:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:24:56,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2021-08-21 12:24:56,590 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:56,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 133 [2021-08-21 12:24:56,597 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:24:56,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 111 [2021-08-21 12:24:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:56,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227909094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:56,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:24:56,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 12:24:56,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026791991] [2021-08-21 12:24:56,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:24:56,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:24:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:24:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:24:56,754 INFO L87 Difference]: Start difference. First operand 443 states and 1477 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:24:57,381 INFO L93 Difference]: Finished difference Result 512 states and 1661 transitions. [2021-08-21 12:24:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:24:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:24:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:24:57,382 INFO L225 Difference]: With dead ends: 512 [2021-08-21 12:24:57,382 INFO L226 Difference]: Without dead ends: 502 [2021-08-21 12:24:57,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 767.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:24:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-21 12:24:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 445. [2021-08-21 12:24:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.34009009009009) internal successors, (1483), 444 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1483 transitions. [2021-08-21 12:24:57,388 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1483 transitions. Word has length 17 [2021-08-21 12:24:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:24:57,388 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1483 transitions. [2021-08-21 12:24:57,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:24:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1483 transitions. [2021-08-21 12:24:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:24:57,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:24:57,389 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:24:57,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-21 12:24:57,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:57,589 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:24:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:24:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1847073611, now seen corresponding path program 94 times [2021-08-21 12:24:57,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:24:57,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529168077] [2021-08-21 12:24:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:24:57,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:24:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:24:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:24:58,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:24:58,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529168077] [2021-08-21 12:24:58,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529168077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:24:58,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213887770] [2021-08-21 12:24:58,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:24:58,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:24:58,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:24:58,247 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:24:58,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 12:25:04,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:25:04,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:25:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:25:04,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:25:04,423 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:04,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2021-08-21 12:25:04,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:25:04,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 98 [2021-08-21 12:25:04,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 79 [2021-08-21 12:25:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:04,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213887770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:04,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:25:04,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-21 12:25:04,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178733982] [2021-08-21 12:25:04,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:25:04,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:25:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:25:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:25:04,854 INFO L87 Difference]: Start difference. First operand 445 states and 1483 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:25:05,683 INFO L93 Difference]: Finished difference Result 520 states and 1678 transitions. [2021-08-21 12:25:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:25:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:25:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:25:05,684 INFO L225 Difference]: With dead ends: 520 [2021-08-21 12:25:05,684 INFO L226 Difference]: Without dead ends: 495 [2021-08-21 12:25:05,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 823.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:25:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-21 12:25:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 443. [2021-08-21 12:25:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.341628959276018) internal successors, (1477), 442 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1477 transitions. [2021-08-21 12:25:05,689 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1477 transitions. Word has length 17 [2021-08-21 12:25:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:25:05,689 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1477 transitions. [2021-08-21 12:25:05,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:25:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1477 transitions. [2021-08-21 12:25:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:25:05,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:25:05,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:25:05,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:05,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-08-21 12:25:05,891 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:25:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:25:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash -835677579, now seen corresponding path program 95 times [2021-08-21 12:25:05,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:25:05,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060044580] [2021-08-21 12:25:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:25:05,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:25:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:25:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:25:06,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:25:06,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060044580] [2021-08-21 12:25:06,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060044580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:25:06,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645397069] [2021-08-21 12:25:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:25:06,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:06,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:25:06,362 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:25:06,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:25:08,765 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:25:08,776 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:25:09,769 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:25:09,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 12:25:09,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 12:25:09,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:25:09,970 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. [2021-08-21 12:25:09,971 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:25:09,971 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:25:09,971 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 12:25:09,975 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:25:09,975 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:25:09,976 INFO L202 PluginConnector]: Adding new model array-int-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:25:09 BasicIcfg [2021-08-21 12:25:09,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:25:09,976 INFO L168 Benchmark]: Toolchain (without parser) took 741121.09 ms. Allocated memory was 182.5 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 162.5 MB in the beginning and 250.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 12:25:09,977 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 182.5 MB. Free memory was 163.8 MB in the beginning and 163.7 MB in the end (delta: 68.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:25:09,977 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.49 ms. Allocated memory is still 182.5 MB. Free memory was 162.4 MB in the beginning and 160.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:25:09,977 INFO L168 Benchmark]: Boogie Preprocessor took 12.45 ms. Allocated memory is still 182.5 MB. Free memory was 160.9 MB in the beginning and 159.9 MB in the end (delta: 976.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:25:09,977 INFO L168 Benchmark]: RCFGBuilder took 279.54 ms. Allocated memory is still 182.5 MB. Free memory was 159.8 MB in the beginning and 138.3 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:25:09,977 INFO L168 Benchmark]: TraceAbstraction took 740806.15 ms. Allocated memory was 182.5 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 137.7 MB in the beginning and 250.3 MB in the end (delta: -112.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-21 12:25:09,977 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 0.11 ms. Allocated memory is still 182.5 MB. Free memory was 163.8 MB in the beginning and 163.7 MB in the end (delta: 68.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.49 ms. Allocated memory is still 182.5 MB. Free memory was 162.4 MB in the beginning and 160.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.45 ms. Allocated memory is still 182.5 MB. Free memory was 160.9 MB in the beginning and 159.9 MB in the end (delta: 976.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 279.54 ms. Allocated memory is still 182.5 MB. Free memory was 159.8 MB in the beginning and 138.3 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 740806.15 ms. Allocated memory was 182.5 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 137.7 MB in the beginning and 250.3 MB in the end (delta: -112.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 740713.9ms, OverallIterations: 295, TraceHistogramMax: 1, EmptinessCheckTime: 138.1ms, AutomataDifference: 109645.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8455 SDtfs, 18819 SDslu, 32502 SDs, 0 SdLazy, 68789 SolverSat, 2598 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35537.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7447 GetRequests, 3094 SyntacticMatches, 120 SemanticMatches, 4233 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 7180 ImplicationChecksByTransitivity, 105176.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=445occurred in iteration=293, InterpolantAutomatonStates: 2707, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1001.6ms AutomataMinimizationTime, 294 MinimizatonAttempts, 22545 StatesRemovedByMinimization, 293 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 965.5ms SsaConstructionTime, 3228.2ms SatisfiabilityAnalysisTime, 137655.1ms InterpolantComputationTime, 8382 NumberOfCodeBlocks, 8382 NumberOfCodeBlocksAsserted, 710 NumberOfCheckSat, 7865 ConstructedInterpolants, 145 QuantifiedInterpolants, 137422 SizeOfPredicates, 1679 NumberOfNonLiveVariables, 14760 ConjunctsInSsa, 3653 ConjunctsInUnsatCore, 517 InterpolantComputations, 71 PerfectInterpolantSequences, 258/1144 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