/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/word-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:27:46,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:27:46,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:27:46,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:27:46,258 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 12:27:46,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:27:46,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:27:46,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:27:46,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:27:46,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:27:46,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:27:46,288 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:27:46,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:27:46,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:27:46,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:27:46,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:27:46,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:27:46,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:27:46,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:27:46,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:27:46,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:27:46,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:27:46,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:27:46,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:27:46,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:27:46,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:27:46,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:27:46,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:27:46,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:27:46,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:27:46,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:27:46,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:27:46,574 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:27:46,577 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:27:46,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl [2021-08-21 12:27:46,577 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-trans.wvr.bpl' [2021-08-21 12:27:46,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:27:46,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:27:46,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:27:46,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:27:46,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:27:46,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:27:46,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:27:46,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:27:46,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:27:46,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:27:46,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:27:46,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:27:46,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:27:46,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/1) ... [2021-08-21 12:27:46,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:27:46,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:27:46,681 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 12:27:46,683 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 12:27:46,707 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:27:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:27:46,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:27:46,707 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:27:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:27:46,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:27:46,707 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:27:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:27:46,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:27:46,708 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:27:46,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:27:46,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:27:46,708 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 12:27:46,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:27:46,944 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 12:27:46,946 INFO L202 PluginConnector]: Adding new model word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:27:46 BoogieIcfgContainer [2021-08-21 12:27:46,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:27:46,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:27:46,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:27:46,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:27:46,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:27:46" (1/2) ... [2021-08-21 12:27:46,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c862655 and model type word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:27:46, skipping insertion in model container [2021-08-21 12:27:46,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:27:46" (2/2) ... [2021-08-21 12:27:46,950 INFO L111 eAbstractionObserver]: Analyzing ICFG word-trans.wvr.bpl [2021-08-21 12:27:46,953 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:27:46,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:27:46,954 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:27:46,954 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:27:46,982 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:27:47,008 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:27:47,012 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 12:27:47,012 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:27:47,032 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-08-21 12:27:47,054 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 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 12:27:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 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 12:27:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:27:47,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:47,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:47,063 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash -175708281, now seen corresponding path program 1 times [2021-08-21 12:27:47,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:47,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761661366] [2021-08-21 12:27:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:47,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:47,275 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 12:27:47,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:47,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761661366] [2021-08-21 12:27:47,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761661366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:47,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:47,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:47,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952849574] [2021-08-21 12:27:47,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:47,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:47,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:47,289 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 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) 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 12:27:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:47,381 INFO L93 Difference]: Finished difference Result 230 states and 687 transitions. [2021-08-21 12:27:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:47,382 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 12:27:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:47,390 INFO L225 Difference]: With dead ends: 230 [2021-08-21 12:27:47,390 INFO L226 Difference]: Without dead ends: 215 [2021-08-21 12:27:47,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-21 12:27:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 126. [2021-08-21 12:27:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-08-21 12:27:47,422 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-08-21 12:27:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:47,423 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-08-21 12:27:47,423 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 12:27:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-08-21 12:27:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:27:47,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:47,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:47,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:27:47,425 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -398208309, now seen corresponding path program 2 times [2021-08-21 12:27:47,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:47,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080004914] [2021-08-21 12:27:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:47,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:47,493 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 12:27:47,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:47,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080004914] [2021-08-21 12:27:47,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080004914] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:47,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:47,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:47,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014003924] [2021-08-21 12:27:47,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:47,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:47,496 INFO L87 Difference]: Start difference. First operand 126 states and 421 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 12:27:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:47,587 INFO L93 Difference]: Finished difference Result 257 states and 779 transitions. [2021-08-21 12:27:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:47,588 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 12:27:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:47,590 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:27:47,590 INFO L226 Difference]: Without dead ends: 242 [2021-08-21 12:27:47,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-21 12:27:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 132. [2021-08-21 12:27:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-08-21 12:27:47,600 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-08-21 12:27:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:47,600 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-08-21 12:27:47,600 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 12:27:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-08-21 12:27:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:27:47,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:47,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:47,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:27:47,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash 484418539, now seen corresponding path program 3 times [2021-08-21 12:27:47,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:47,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221576687] [2021-08-21 12:27:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:47,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:47,659 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 12:27:47,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:47,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221576687] [2021-08-21 12:27:47,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221576687] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:47,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:47,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:47,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219113476] [2021-08-21 12:27:47,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:47,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:47,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:47,661 INFO L87 Difference]: Start difference. First operand 132 states and 434 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 12:27:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:47,727 INFO L93 Difference]: Finished difference Result 244 states and 710 transitions. [2021-08-21 12:27:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:47,727 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 12:27:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:47,728 INFO L225 Difference]: With dead ends: 244 [2021-08-21 12:27:47,728 INFO L226 Difference]: Without dead ends: 229 [2021-08-21 12:27:47,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-21 12:27:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 136. [2021-08-21 12:27:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.3333333333333335) internal successors, (450), 135 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 450 transitions. [2021-08-21 12:27:47,776 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 450 transitions. Word has length 14 [2021-08-21 12:27:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:47,776 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 450 transitions. [2021-08-21 12:27:47,777 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 12:27:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 450 transitions. [2021-08-21 12:27:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:27:47,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:47,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:27:47,794 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash 843948803, now seen corresponding path program 4 times [2021-08-21 12:27:47,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:47,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051256619] [2021-08-21 12:27:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:47,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:47,894 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 12:27:47,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:47,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051256619] [2021-08-21 12:27:47,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051256619] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:47,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:47,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:47,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636926732] [2021-08-21 12:27:47,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:47,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:47,896 INFO L87 Difference]: Start difference. First operand 136 states and 450 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 12:27:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:47,980 INFO L93 Difference]: Finished difference Result 251 states and 743 transitions. [2021-08-21 12:27:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:47,981 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 12:27:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:47,982 INFO L225 Difference]: With dead ends: 251 [2021-08-21 12:27:47,982 INFO L226 Difference]: Without dead ends: 236 [2021-08-21 12:27:47,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-21 12:27:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 140. [2021-08-21 12:27:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 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 12:27:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-08-21 12:27:47,988 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-08-21 12:27:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:47,989 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-08-21 12:27:47,989 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 12:27:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-08-21 12:27:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:27:47,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:47,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:47,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:27:47,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:47,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:47,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1643666631, now seen corresponding path program 5 times [2021-08-21 12:27:47,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:47,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990118270] [2021-08-21 12:27:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:47,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,040 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 12:27:48,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990118270] [2021-08-21 12:27:48,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990118270] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835613560] [2021-08-21 12:27:48,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,042 INFO L87 Difference]: Start difference. First operand 140 states and 458 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 12:27:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,117 INFO L93 Difference]: Finished difference Result 279 states and 867 transitions. [2021-08-21 12:27:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:48,118 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 12:27:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,119 INFO L225 Difference]: With dead ends: 279 [2021-08-21 12:27:48,119 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 12:27:48,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:48,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 12:27:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 142. [2021-08-21 12:27:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 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 12:27:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-08-21 12:27:48,128 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-08-21 12:27:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,128 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-08-21 12:27:48,129 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 12:27:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-08-21 12:27:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:27:48,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:27:48,130 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1513926101, now seen corresponding path program 6 times [2021-08-21 12:27:48,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509910996] [2021-08-21 12:27:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:48,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509910996] [2021-08-21 12:27:48,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509910996] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313386233] [2021-08-21 12:27:48,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,221 INFO L87 Difference]: Start difference. First operand 142 states and 467 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 12:27:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,310 INFO L93 Difference]: Finished difference Result 270 states and 831 transitions. [2021-08-21 12:27:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:48,310 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 12:27:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,311 INFO L225 Difference]: With dead ends: 270 [2021-08-21 12:27:48,312 INFO L226 Difference]: Without dead ends: 255 [2021-08-21 12:27:48,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-21 12:27:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 142. [2021-08-21 12:27:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 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 12:27:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-08-21 12:27:48,317 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-08-21 12:27:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,323 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-08-21 12:27:48,324 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 12:27:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-08-21 12:27:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:48,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:27:48,326 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1121798664, now seen corresponding path program 1 times [2021-08-21 12:27:48,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063931325] [2021-08-21 12:27:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,394 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 12:27:48,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063931325] [2021-08-21 12:27:48,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063931325] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582260311] [2021-08-21 12:27:48,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,398 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,450 INFO L93 Difference]: Finished difference Result 257 states and 749 transitions. [2021-08-21 12:27:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,452 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:27:48,452 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 12:27:48,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 12:27:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 142. [2021-08-21 12:27:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.276595744680851) internal successors, (462), 141 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 12:27:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 462 transitions. [2021-08-21 12:27:48,459 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 462 transitions. Word has length 15 [2021-08-21 12:27:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,459 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 462 transitions. [2021-08-21 12:27:48,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 462 transitions. [2021-08-21 12:27:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:48,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:27:48,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1302869542, now seen corresponding path program 1 times [2021-08-21 12:27:48,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808243506] [2021-08-21 12:27:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,548 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 12:27:48,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808243506] [2021-08-21 12:27:48,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808243506] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917601866] [2021-08-21 12:27:48,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,549 INFO L87 Difference]: Start difference. First operand 142 states and 462 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,609 INFO L93 Difference]: Finished difference Result 280 states and 838 transitions. [2021-08-21 12:27:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,611 INFO L225 Difference]: With dead ends: 280 [2021-08-21 12:27:48,611 INFO L226 Difference]: Without dead ends: 259 [2021-08-21 12:27:48,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-08-21 12:27:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 147. [2021-08-21 12:27:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.287671232876712) internal successors, (480), 146 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 12:27:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 480 transitions. [2021-08-21 12:27:48,615 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 480 transitions. Word has length 15 [2021-08-21 12:27:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,615 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 480 transitions. [2021-08-21 12:27:48,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 480 transitions. [2021-08-21 12:27:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:48,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,616 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 12:27:48,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1442736794, now seen corresponding path program 2 times [2021-08-21 12:27:48,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664915898] [2021-08-21 12:27:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,655 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 12:27:48,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664915898] [2021-08-21 12:27:48,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664915898] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127639420] [2021-08-21 12:27:48,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,657 INFO L87 Difference]: Start difference. First operand 147 states and 480 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,713 INFO L93 Difference]: Finished difference Result 278 states and 832 transitions. [2021-08-21 12:27:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,715 INFO L225 Difference]: With dead ends: 278 [2021-08-21 12:27:48,715 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 12:27:48,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 12:27:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 147. [2021-08-21 12:27:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 3.267123287671233) internal successors, (477), 146 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 477 transitions. [2021-08-21 12:27:48,721 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 477 transitions. Word has length 15 [2021-08-21 12:27:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,724 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 477 transitions. [2021-08-21 12:27:48,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 477 transitions. [2021-08-21 12:27:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:48,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 12:27:48,727 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash -229896958, now seen corresponding path program 2 times [2021-08-21 12:27:48,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945630110] [2021-08-21 12:27:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,776 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 12:27:48,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945630110] [2021-08-21 12:27:48,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945630110] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124526756] [2021-08-21 12:27:48,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,777 INFO L87 Difference]: Start difference. First operand 147 states and 477 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,835 INFO L93 Difference]: Finished difference Result 278 states and 835 transitions. [2021-08-21 12:27:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:48,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,837 INFO L225 Difference]: With dead ends: 278 [2021-08-21 12:27:48,837 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 12:27:48,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 12:27:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 150. [2021-08-21 12:27:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 3.2751677852348995) internal successors, (488), 149 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 12:27:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 488 transitions. [2021-08-21 12:27:48,841 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 488 transitions. Word has length 15 [2021-08-21 12:27:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 488 transitions. [2021-08-21 12:27:48,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 488 transitions. [2021-08-21 12:27:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:48,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 12:27:48,843 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash 352207545, now seen corresponding path program 1 times [2021-08-21 12:27:48,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438254568] [2021-08-21 12:27:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,883 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 12:27:48,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438254568] [2021-08-21 12:27:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438254568] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53910912] [2021-08-21 12:27:48,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,885 INFO L87 Difference]: Start difference. First operand 150 states and 488 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:48,941 INFO L93 Difference]: Finished difference Result 281 states and 835 transitions. [2021-08-21 12:27:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:48,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:48,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:48,943 INFO L225 Difference]: With dead ends: 281 [2021-08-21 12:27:48,943 INFO L226 Difference]: Without dead ends: 262 [2021-08-21 12:27:48,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-21 12:27:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 154. [2021-08-21 12:27:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 3.281045751633987) internal successors, (502), 153 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 502 transitions. [2021-08-21 12:27:48,947 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 502 transitions. Word has length 15 [2021-08-21 12:27:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:48,947 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 502 transitions. [2021-08-21 12:27:48,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 502 transitions. [2021-08-21 12:27:48,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:48,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:48,948 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:48,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 12:27:48,948 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 129707517, now seen corresponding path program 2 times [2021-08-21 12:27:48,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:48,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510656687] [2021-08-21 12:27:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:48,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:48,976 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 12:27:48,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:48,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510656687] [2021-08-21 12:27:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510656687] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:48,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:48,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:48,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810646366] [2021-08-21 12:27:48,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:48,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:48,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:48,977 INFO L87 Difference]: Start difference. First operand 154 states and 502 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,052 INFO L93 Difference]: Finished difference Result 373 states and 1108 transitions. [2021-08-21 12:27:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:27:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,054 INFO L225 Difference]: With dead ends: 373 [2021-08-21 12:27:49,054 INFO L226 Difference]: Without dead ends: 354 [2021-08-21 12:27:49,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-21 12:27:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 156. [2021-08-21 12:27:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2838709677419353) internal successors, (509), 155 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 509 transitions. [2021-08-21 12:27:49,059 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 509 transitions. Word has length 15 [2021-08-21 12:27:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,059 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 509 transitions. [2021-08-21 12:27:49,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 509 transitions. [2021-08-21 12:27:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 12:27:49,060 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2132703724, now seen corresponding path program 3 times [2021-08-21 12:27:49,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008054714] [2021-08-21 12:27:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,104 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 12:27:49,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008054714] [2021-08-21 12:27:49,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008054714] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655066032] [2021-08-21 12:27:49,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,105 INFO L87 Difference]: Start difference. First operand 156 states and 509 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,157 INFO L93 Difference]: Finished difference Result 275 states and 785 transitions. [2021-08-21 12:27:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,159 INFO L225 Difference]: With dead ends: 275 [2021-08-21 12:27:49,159 INFO L226 Difference]: Without dead ends: 242 [2021-08-21 12:27:49,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-21 12:27:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 156. [2021-08-21 12:27:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2580645161290325) internal successors, (505), 155 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 505 transitions. [2021-08-21 12:27:49,163 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 505 transitions. Word has length 15 [2021-08-21 12:27:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,163 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 505 transitions. [2021-08-21 12:27:49,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 505 transitions. [2021-08-21 12:27:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 12:27:49,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1336190699, now seen corresponding path program 3 times [2021-08-21 12:27:49,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539604480] [2021-08-21 12:27:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,204 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 12:27:49,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539604480] [2021-08-21 12:27:49,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539604480] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389259391] [2021-08-21 12:27:49,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,206 INFO L87 Difference]: Start difference. First operand 156 states and 505 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,264 INFO L93 Difference]: Finished difference Result 276 states and 800 transitions. [2021-08-21 12:27:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:49,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,266 INFO L225 Difference]: With dead ends: 276 [2021-08-21 12:27:49,266 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 12:27:49,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 12:27:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 156. [2021-08-21 12:27:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2580645161290325) internal successors, (505), 155 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 505 transitions. [2021-08-21 12:27:49,270 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 505 transitions. Word has length 15 [2021-08-21 12:27:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,270 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 505 transitions. [2021-08-21 12:27:49,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 505 transitions. [2021-08-21 12:27:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 12:27:49,271 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1816909085, now seen corresponding path program 4 times [2021-08-21 12:27:49,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909210560] [2021-08-21 12:27:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,316 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 12:27:49,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909210560] [2021-08-21 12:27:49,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909210560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741041682] [2021-08-21 12:27:49,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,317 INFO L87 Difference]: Start difference. First operand 156 states and 505 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,374 INFO L93 Difference]: Finished difference Result 246 states and 733 transitions. [2021-08-21 12:27:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,375 INFO L225 Difference]: With dead ends: 246 [2021-08-21 12:27:49,375 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 12:27:49,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 12:27:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2021-08-21 12:27:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.2451612903225806) internal successors, (503), 155 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 12:27:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 503 transitions. [2021-08-21 12:27:49,379 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 503 transitions. Word has length 15 [2021-08-21 12:27:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,379 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 503 transitions. [2021-08-21 12:27:49,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 503 transitions. [2021-08-21 12:27:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 12:27:49,380 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2004830762, now seen corresponding path program 4 times [2021-08-21 12:27:49,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142123497] [2021-08-21 12:27:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,425 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 12:27:49,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142123497] [2021-08-21 12:27:49,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142123497] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280999523] [2021-08-21 12:27:49,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,427 INFO L87 Difference]: Start difference. First operand 156 states and 503 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,485 INFO L93 Difference]: Finished difference Result 267 states and 773 transitions. [2021-08-21 12:27:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,486 INFO L225 Difference]: With dead ends: 267 [2021-08-21 12:27:49,487 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 12:27:49,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 12:27:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 158. [2021-08-21 12:27:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.248407643312102) internal successors, (510), 157 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 510 transitions. [2021-08-21 12:27:49,491 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 510 transitions. Word has length 15 [2021-08-21 12:27:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,491 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 510 transitions. [2021-08-21 12:27:49,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 510 transitions. [2021-08-21 12:27:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,492 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 12:27:49,492 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,492 INFO L82 PathProgramCache]: Analyzing trace with hash -377237420, now seen corresponding path program 3 times [2021-08-21 12:27:49,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944138782] [2021-08-21 12:27:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,540 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 12:27:49,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944138782] [2021-08-21 12:27:49,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944138782] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618459680] [2021-08-21 12:27:49,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,541 INFO L87 Difference]: Start difference. First operand 158 states and 510 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,587 INFO L93 Difference]: Finished difference Result 285 states and 834 transitions. [2021-08-21 12:27:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,589 INFO L225 Difference]: With dead ends: 285 [2021-08-21 12:27:49,589 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 12:27:49,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 12:27:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 158. [2021-08-21 12:27:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 3.248407643312102) internal successors, (510), 157 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 510 transitions. [2021-08-21 12:27:49,593 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 510 transitions. Word has length 15 [2021-08-21 12:27:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,593 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 510 transitions. [2021-08-21 12:27:49,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 510 transitions. [2021-08-21 12:27:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,593 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 12:27:49,594 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash 48205174, now seen corresponding path program 4 times [2021-08-21 12:27:49,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934449204] [2021-08-21 12:27:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,622 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 12:27:49,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934449204] [2021-08-21 12:27:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934449204] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882695710] [2021-08-21 12:27:49,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,624 INFO L87 Difference]: Start difference. First operand 158 states and 510 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,685 INFO L93 Difference]: Finished difference Result 329 states and 972 transitions. [2021-08-21 12:27:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:27:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,686 INFO L225 Difference]: With dead ends: 329 [2021-08-21 12:27:49,686 INFO L226 Difference]: Without dead ends: 308 [2021-08-21 12:27:49,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-08-21 12:27:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 160. [2021-08-21 12:27:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.251572327044025) internal successors, (517), 159 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 517 transitions. [2021-08-21 12:27:49,691 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 517 transitions. Word has length 15 [2021-08-21 12:27:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,691 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 517 transitions. [2021-08-21 12:27:49,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 517 transitions. [2021-08-21 12:27:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 12:27:49,692 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash 316350494, now seen corresponding path program 5 times [2021-08-21 12:27:49,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582333544] [2021-08-21 12:27:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,726 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 12:27:49,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582333544] [2021-08-21 12:27:49,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582333544] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521775963] [2021-08-21 12:27:49,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,727 INFO L87 Difference]: Start difference. First operand 160 states and 517 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,780 INFO L93 Difference]: Finished difference Result 312 states and 950 transitions. [2021-08-21 12:27:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,782 INFO L225 Difference]: With dead ends: 312 [2021-08-21 12:27:49,782 INFO L226 Difference]: Without dead ends: 285 [2021-08-21 12:27:49,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-21 12:27:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-08-21 12:27:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 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 12:27:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-08-21 12:27:49,786 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-08-21 12:27:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,786 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-08-21 12:27:49,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-08-21 12:27:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 12:27:49,787 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,787 INFO L82 PathProgramCache]: Analyzing trace with hash -99509597, now seen corresponding path program 5 times [2021-08-21 12:27:49,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437742507] [2021-08-21 12:27:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,816 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 12:27:49,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437742507] [2021-08-21 12:27:49,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437742507] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440564886] [2021-08-21 12:27:49,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,817 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,882 INFO L93 Difference]: Finished difference Result 373 states and 1130 transitions. [2021-08-21 12:27:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:27:49,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,883 INFO L225 Difference]: With dead ends: 373 [2021-08-21 12:27:49,884 INFO L226 Difference]: Without dead ends: 354 [2021-08-21 12:27:49,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-21 12:27:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 160. [2021-08-21 12:27:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.238993710691824) internal successors, (515), 159 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 12:27:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 515 transitions. [2021-08-21 12:27:49,888 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 515 transitions. Word has length 15 [2021-08-21 12:27:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,888 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 515 transitions. [2021-08-21 12:27:49,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 515 transitions. [2021-08-21 12:27:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 12:27:49,889 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash 952554009, now seen corresponding path program 6 times [2021-08-21 12:27:49,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794088821] [2021-08-21 12:27:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:49,922 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 12:27:49,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:49,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794088821] [2021-08-21 12:27:49,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794088821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:49,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:49,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:49,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856607314] [2021-08-21 12:27:49,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:49,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:49,924 INFO L87 Difference]: Start difference. First operand 160 states and 515 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:49,971 INFO L93 Difference]: Finished difference Result 274 states and 848 transitions. [2021-08-21 12:27:49,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:49,987 INFO L225 Difference]: With dead ends: 274 [2021-08-21 12:27:49,987 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 12:27:49,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 12:27:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 160. [2021-08-21 12:27:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2264150943396226) internal successors, (513), 159 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 513 transitions. [2021-08-21 12:27:49,991 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 513 transitions. Word has length 15 [2021-08-21 12:27:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:49,992 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 513 transitions. [2021-08-21 12:27:49,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 513 transitions. [2021-08-21 12:27:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:49,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:49,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:49,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 12:27:49,993 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash 131206424, now seen corresponding path program 6 times [2021-08-21 12:27:49,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:49,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417741228] [2021-08-21 12:27:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:49,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,027 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 12:27:50,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417741228] [2021-08-21 12:27:50,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417741228] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:50,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401705671] [2021-08-21 12:27:50,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:50,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,029 INFO L87 Difference]: Start difference. First operand 160 states and 513 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,100 INFO L93 Difference]: Finished difference Result 380 states and 1149 transitions. [2021-08-21 12:27:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:27:50,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,102 INFO L225 Difference]: With dead ends: 380 [2021-08-21 12:27:50,102 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 12:27:50,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 12:27:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 160. [2021-08-21 12:27:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2264150943396226) internal successors, (513), 159 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 513 transitions. [2021-08-21 12:27:50,107 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 513 transitions. Word has length 15 [2021-08-21 12:27:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,108 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 513 transitions. [2021-08-21 12:27:50,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 513 transitions. [2021-08-21 12:27:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:50,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,108 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 12:27:50,108 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash -303614762, now seen corresponding path program 5 times [2021-08-21 12:27:50,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711535174] [2021-08-21 12:27:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,137 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 12:27:50,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711535174] [2021-08-21 12:27:50,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711535174] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:50,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587874499] [2021-08-21 12:27:50,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:50,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:50,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,139 INFO L87 Difference]: Start difference. First operand 160 states and 513 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,191 INFO L93 Difference]: Finished difference Result 272 states and 793 transitions. [2021-08-21 12:27:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,193 INFO L225 Difference]: With dead ends: 272 [2021-08-21 12:27:50,193 INFO L226 Difference]: Without dead ends: 250 [2021-08-21 12:27:50,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-21 12:27:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 160. [2021-08-21 12:27:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2264150943396226) internal successors, (513), 159 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 513 transitions. [2021-08-21 12:27:50,197 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 513 transitions. Word has length 15 [2021-08-21 12:27:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,197 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 513 transitions. [2021-08-21 12:27:50,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 513 transitions. [2021-08-21 12:27:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:27:50,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-21 12:27:50,198 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 833759802, now seen corresponding path program 6 times [2021-08-21 12:27:50,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84517705] [2021-08-21 12:27:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,228 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 12:27:50,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84517705] [2021-08-21 12:27:50,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84517705] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 12:27:50,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194795381] [2021-08-21 12:27:50,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:27:50,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:27:50,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,229 INFO L87 Difference]: Start difference. First operand 160 states and 513 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,280 INFO L93 Difference]: Finished difference Result 263 states and 757 transitions. [2021-08-21 12:27:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 12:27:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,281 INFO L225 Difference]: With dead ends: 263 [2021-08-21 12:27:50,282 INFO L226 Difference]: Without dead ends: 241 [2021-08-21 12:27:50,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:27:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-21 12:27:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 160. [2021-08-21 12:27:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.2264150943396226) internal successors, (513), 159 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 513 transitions. [2021-08-21 12:27:50,286 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 513 transitions. Word has length 15 [2021-08-21 12:27:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,286 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 513 transitions. [2021-08-21 12:27:50,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 513 transitions. [2021-08-21 12:27:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-21 12:27:50,287 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1704059387, now seen corresponding path program 1 times [2021-08-21 12:27:50,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667155456] [2021-08-21 12:27:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,303 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 12:27:50,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667155456] [2021-08-21 12:27:50,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667155456] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054955138] [2021-08-21 12:27:50,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,304 INFO L87 Difference]: Start difference. First operand 160 states and 513 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,318 INFO L93 Difference]: Finished difference Result 304 states and 846 transitions. [2021-08-21 12:27:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,320 INFO L225 Difference]: With dead ends: 304 [2021-08-21 12:27:50,320 INFO L226 Difference]: Without dead ends: 282 [2021-08-21 12:27:50,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-08-21 12:27:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 160. [2021-08-21 12:27:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 3.1823899371069184) internal successors, (506), 159 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 506 transitions. [2021-08-21 12:27:50,324 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 506 transitions. Word has length 16 [2021-08-21 12:27:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,324 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 506 transitions. [2021-08-21 12:27:50,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 506 transitions. [2021-08-21 12:27:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-21 12:27:50,325 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1929545917, now seen corresponding path program 2 times [2021-08-21 12:27:50,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999193885] [2021-08-21 12:27:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,338 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 12:27:50,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999193885] [2021-08-21 12:27:50,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999193885] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202325302] [2021-08-21 12:27:50,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,339 INFO L87 Difference]: Start difference. First operand 160 states and 506 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,355 INFO L93 Difference]: Finished difference Result 298 states and 826 transitions. [2021-08-21 12:27:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,357 INFO L225 Difference]: With dead ends: 298 [2021-08-21 12:27:50,357 INFO L226 Difference]: Without dead ends: 276 [2021-08-21 12:27:50,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-21 12:27:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 153. [2021-08-21 12:27:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 3.223684210526316) internal successors, (490), 152 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 12:27:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 490 transitions. [2021-08-21 12:27:50,360 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 490 transitions. Word has length 16 [2021-08-21 12:27:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,360 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 490 transitions. [2021-08-21 12:27:50,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 490 transitions. [2021-08-21 12:27:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-21 12:27:50,361 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1936277242, now seen corresponding path program 1 times [2021-08-21 12:27:50,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426389950] [2021-08-21 12:27:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,375 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 12:27:50,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426389950] [2021-08-21 12:27:50,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426389950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528811349] [2021-08-21 12:27:50,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,376 INFO L87 Difference]: Start difference. First operand 153 states and 490 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,392 INFO L93 Difference]: Finished difference Result 260 states and 732 transitions. [2021-08-21 12:27:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,394 INFO L225 Difference]: With dead ends: 260 [2021-08-21 12:27:50,394 INFO L226 Difference]: Without dead ends: 235 [2021-08-21 12:27:50,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-21 12:27:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 149. [2021-08-21 12:27:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.1621621621621623) internal successors, (468), 148 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 12:27:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 468 transitions. [2021-08-21 12:27:50,398 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 468 transitions. Word has length 16 [2021-08-21 12:27:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,399 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 468 transitions. [2021-08-21 12:27:50,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 468 transitions. [2021-08-21 12:27:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,399 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-21 12:27:50,400 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2117348120, now seen corresponding path program 1 times [2021-08-21 12:27:50,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516159026] [2021-08-21 12:27:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,416 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 12:27:50,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516159026] [2021-08-21 12:27:50,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516159026] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384357225] [2021-08-21 12:27:50,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,417 INFO L87 Difference]: Start difference. First operand 149 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,438 INFO L93 Difference]: Finished difference Result 257 states and 726 transitions. [2021-08-21 12:27:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,439 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:27:50,439 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 12:27:50,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 12:27:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 143. [2021-08-21 12:27:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.147887323943662) internal successors, (447), 142 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 12:27:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 447 transitions. [2021-08-21 12:27:50,443 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 447 transitions. Word has length 16 [2021-08-21 12:27:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,443 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 447 transitions. [2021-08-21 12:27:50,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 447 transitions. [2021-08-21 12:27:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-21 12:27:50,443 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1557952042, now seen corresponding path program 2 times [2021-08-21 12:27:50,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770813807] [2021-08-21 12:27:50,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,466 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 12:27:50,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770813807] [2021-08-21 12:27:50,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770813807] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293297969] [2021-08-21 12:27:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,467 INFO L87 Difference]: Start difference. First operand 143 states and 447 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,484 INFO L93 Difference]: Finished difference Result 237 states and 668 transitions. [2021-08-21 12:27:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,485 INFO L225 Difference]: With dead ends: 237 [2021-08-21 12:27:50,485 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 12:27:50,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 12:27:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2021-08-21 12:27:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.1666666666666665) internal successors, (437), 138 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 12:27:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 437 transitions. [2021-08-21 12:27:50,489 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 437 transitions. Word has length 16 [2021-08-21 12:27:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,489 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 437 transitions. [2021-08-21 12:27:50,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 437 transitions. [2021-08-21 12:27:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-21 12:27:50,490 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1220732619, now seen corresponding path program 3 times [2021-08-21 12:27:50,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269633651] [2021-08-21 12:27:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,503 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 12:27:50,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269633651] [2021-08-21 12:27:50,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269633651] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750134957] [2021-08-21 12:27:50,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,504 INFO L87 Difference]: Start difference. First operand 139 states and 437 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,518 INFO L93 Difference]: Finished difference Result 236 states and 663 transitions. [2021-08-21 12:27:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:27:50,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,519 INFO L225 Difference]: With dead ends: 236 [2021-08-21 12:27:50,519 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 12:27:50,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 12:27:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 139. [2021-08-21 12:27:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.101449275362319) internal successors, (428), 138 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 428 transitions. [2021-08-21 12:27:50,523 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 428 transitions. Word has length 16 [2021-08-21 12:27:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,523 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 428 transitions. [2021-08-21 12:27:50,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 428 transitions. [2021-08-21 12:27:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-21 12:27:50,524 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1404034676, now seen corresponding path program 2 times [2021-08-21 12:27:50,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348073575] [2021-08-21 12:27:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,538 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 12:27:50,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348073575] [2021-08-21 12:27:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348073575] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564230896] [2021-08-21 12:27:50,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,540 INFO L87 Difference]: Start difference. First operand 139 states and 428 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,573 INFO L93 Difference]: Finished difference Result 157 states and 457 transitions. [2021-08-21 12:27:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:27:50,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,575 INFO L225 Difference]: With dead ends: 157 [2021-08-21 12:27:50,575 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 12:27:50,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 12:27:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 108. [2021-08-21 12:27:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.9345794392523366) internal successors, (314), 107 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 314 transitions. [2021-08-21 12:27:50,577 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 314 transitions. Word has length 16 [2021-08-21 12:27:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 314 transitions. [2021-08-21 12:27:50,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 314 transitions. [2021-08-21 12:27:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:27:50,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,578 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-21 12:27:50,578 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,578 INFO L82 PathProgramCache]: Analyzing trace with hash 80169455, now seen corresponding path program 4 times [2021-08-21 12:27:50,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739437283] [2021-08-21 12:27:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,591 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 12:27:50,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739437283] [2021-08-21 12:27:50,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739437283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:27:50,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562821201] [2021-08-21 12:27:50,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:27:50,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:27:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:27:50,592 INFO L87 Difference]: Start difference. First operand 108 states and 314 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,604 INFO L93 Difference]: Finished difference Result 123 states and 338 transitions. [2021-08-21 12:27:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:27:50,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,605 INFO L225 Difference]: With dead ends: 123 [2021-08-21 12:27:50,605 INFO L226 Difference]: Without dead ends: 108 [2021-08-21 12:27:50,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:27:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-21 12:27:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-21 12:27:50,609 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 12:27:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-08-21 12:27:50,609 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-08-21 12:27:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,610 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-08-21 12:27:50,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 12:27:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-08-21 12:27:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:50,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,610 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 12:27:50,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-21 12:27:50,610 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1183091529, now seen corresponding path program 1 times [2021-08-21 12:27:50,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185856202] [2021-08-21 12:27:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,656 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 12:27:50,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185856202] [2021-08-21 12:27:50,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185856202] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:50,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092948660] [2021-08-21 12:27:50,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:50,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:50,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:50,657 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,745 INFO L93 Difference]: Finished difference Result 265 states and 721 transitions. [2021-08-21 12:27:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:50,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:50,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,747 INFO L225 Difference]: With dead ends: 265 [2021-08-21 12:27:50,747 INFO L226 Difference]: Without dead ends: 250 [2021-08-21 12:27:50,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-21 12:27:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-08-21 12:27:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7928571428571427) internal successors, (391), 140 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 12:27:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-08-21 12:27:50,750 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-08-21 12:27:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,750 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-08-21 12:27:50,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-08-21 12:27:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:50,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:50,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-21 12:27:50,750 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash 922093723, now seen corresponding path program 2 times [2021-08-21 12:27:50,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678791153] [2021-08-21 12:27:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,799 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 12:27:50,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678791153] [2021-08-21 12:27:50,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678791153] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:50,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278401568] [2021-08-21 12:27:50,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:50,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:50,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:50,800 INFO L87 Difference]: Start difference. First operand 141 states and 391 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:50,889 INFO L93 Difference]: Finished difference Result 298 states and 795 transitions. [2021-08-21 12:27:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:50,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:50,891 INFO L225 Difference]: With dead ends: 298 [2021-08-21 12:27:50,891 INFO L226 Difference]: Without dead ends: 283 [2021-08-21 12:27:50,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-21 12:27:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-08-21 12:27:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 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 12:27:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-08-21 12:27:50,894 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-08-21 12:27:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:50,894 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-08-21 12:27:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-08-21 12:27:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:50,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:50,895 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 12:27:50,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-21 12:27:50,895 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:50,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:50,895 INFO L82 PathProgramCache]: Analyzing trace with hash 944690271, now seen corresponding path program 3 times [2021-08-21 12:27:50,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:50,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209501677] [2021-08-21 12:27:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:50,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:50,943 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 12:27:50,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:50,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209501677] [2021-08-21 12:27:50,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209501677] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:50,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:50,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:50,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325923083] [2021-08-21 12:27:50,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:50,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:50,945 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:51,040 INFO L93 Difference]: Finished difference Result 281 states and 763 transitions. [2021-08-21 12:27:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:51,042 INFO L225 Difference]: With dead ends: 281 [2021-08-21 12:27:51,042 INFO L226 Difference]: Without dead ends: 266 [2021-08-21 12:27:51,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-08-21 12:27:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-08-21 12:27:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 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 12:27:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-08-21 12:27:51,046 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-08-21 12:27:51,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:51,046 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-08-21 12:27:51,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,046 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-08-21 12:27:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:51,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:51,047 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 12:27:51,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-21 12:27:51,047 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:51,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:51,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1408578059, now seen corresponding path program 4 times [2021-08-21 12:27:51,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:51,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272395257] [2021-08-21 12:27:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:51,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:51,093 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 12:27:51,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:51,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272395257] [2021-08-21 12:27:51,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272395257] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:51,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:51,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:51,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750618534] [2021-08-21 12:27:51,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:51,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:51,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:51,094 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:51,184 INFO L93 Difference]: Finished difference Result 289 states and 784 transitions. [2021-08-21 12:27:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:51,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:51,185 INFO L225 Difference]: With dead ends: 289 [2021-08-21 12:27:51,185 INFO L226 Difference]: Without dead ends: 274 [2021-08-21 12:27:51,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-08-21 12:27:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-08-21 12:27:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 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 12:27:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-08-21 12:27:51,188 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-08-21 12:27:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:51,188 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-08-21 12:27:51,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-08-21 12:27:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:51,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:51,189 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 12:27:51,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-21 12:27:51,189 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash 386863921, now seen corresponding path program 5 times [2021-08-21 12:27:51,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:51,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587375676] [2021-08-21 12:27:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:51,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:51,254 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 12:27:51,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:51,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587375676] [2021-08-21 12:27:51,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587375676] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:51,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:51,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:51,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079517017] [2021-08-21 12:27:51,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:51,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:51,255 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:51,366 INFO L93 Difference]: Finished difference Result 322 states and 859 transitions. [2021-08-21 12:27:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:51,368 INFO L225 Difference]: With dead ends: 322 [2021-08-21 12:27:51,368 INFO L226 Difference]: Without dead ends: 307 [2021-08-21 12:27:51,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-21 12:27:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-08-21 12:27:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.8322981366459627) internal successors, (456), 161 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 12:27:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-08-21 12:27:51,372 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-08-21 12:27:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:51,372 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-08-21 12:27:51,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-08-21 12:27:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:51,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:51,372 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 12:27:51,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-21 12:27:51,373 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash 409460469, now seen corresponding path program 6 times [2021-08-21 12:27:51,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:51,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48579182] [2021-08-21 12:27:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:51,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:51,421 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 12:27:51,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:51,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48579182] [2021-08-21 12:27:51,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48579182] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:51,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:51,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:51,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203439973] [2021-08-21 12:27:51,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:51,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:51,422 INFO L87 Difference]: Start difference. First operand 162 states and 456 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:51,532 INFO L93 Difference]: Finished difference Result 299 states and 814 transitions. [2021-08-21 12:27:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:51,534 INFO L225 Difference]: With dead ends: 299 [2021-08-21 12:27:51,534 INFO L226 Difference]: Without dead ends: 284 [2021-08-21 12:27:51,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-21 12:27:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-08-21 12:27:51,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 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 12:27:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-08-21 12:27:51,537 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-08-21 12:27:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:51,537 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-08-21 12:27:51,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-08-21 12:27:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:51,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:51,538 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 12:27:51,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-21 12:27:51,538 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:51,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:51,538 INFO L82 PathProgramCache]: Analyzing trace with hash 868897657, now seen corresponding path program 7 times [2021-08-21 12:27:51,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:51,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287370940] [2021-08-21 12:27:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:51,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:51,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:51,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287370940] [2021-08-21 12:27:51,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287370940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:51,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:51,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:51,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066811783] [2021-08-21 12:27:51,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:51,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:51,584 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:51,674 INFO L93 Difference]: Finished difference Result 389 states and 1040 transitions. [2021-08-21 12:27:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:51,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:51,676 INFO L225 Difference]: With dead ends: 389 [2021-08-21 12:27:51,676 INFO L226 Difference]: Without dead ends: 374 [2021-08-21 12:27:51,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-08-21 12:27:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-08-21 12:27:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.8484848484848486) internal successors, (470), 165 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-08-21 12:27:51,681 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-08-21 12:27:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:51,681 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-08-21 12:27:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-08-21 12:27:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:51,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:51,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:51,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-21 12:27:51,682 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1320884387, now seen corresponding path program 8 times [2021-08-21 12:27:51,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:51,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255962601] [2021-08-21 12:27:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:51,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:51,735 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 12:27:51,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:51,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255962601] [2021-08-21 12:27:51,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255962601] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:51,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:51,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:51,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161851570] [2021-08-21 12:27:51,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:51,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:51,736 INFO L87 Difference]: Start difference. First operand 166 states and 470 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:51,833 INFO L93 Difference]: Finished difference Result 398 states and 1066 transitions. [2021-08-21 12:27:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:51,834 INFO L225 Difference]: With dead ends: 398 [2021-08-21 12:27:51,835 INFO L226 Difference]: Without dead ends: 383 [2021-08-21 12:27:51,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-21 12:27:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-08-21 12:27:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.880952380952381) internal successors, (484), 168 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 12:27:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-08-21 12:27:51,840 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-08-21 12:27:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:51,840 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-08-21 12:27:51,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-08-21 12:27:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:51,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:51,841 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 12:27:51,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-21 12:27:51,841 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1298287839, now seen corresponding path program 9 times [2021-08-21 12:27:51,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:51,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025248908] [2021-08-21 12:27:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:51,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:51,902 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 12:27:51,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:51,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025248908] [2021-08-21 12:27:51,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025248908] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:51,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:51,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:51,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101526997] [2021-08-21 12:27:51,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:51,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:51,905 INFO L87 Difference]: Start difference. First operand 169 states and 484 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:52,026 INFO L93 Difference]: Finished difference Result 405 states and 1082 transitions. [2021-08-21 12:27:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:52,028 INFO L225 Difference]: With dead ends: 405 [2021-08-21 12:27:52,028 INFO L226 Difference]: Without dead ends: 390 [2021-08-21 12:27:52,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-21 12:27:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-08-21 12:27:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.825) internal successors, (452), 160 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-08-21 12:27:52,033 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-08-21 12:27:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:52,033 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-08-21 12:27:52,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-08-21 12:27:52,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:52,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:52,035 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 12:27:52,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-21 12:27:52,035 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:52,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:52,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1429044949, now seen corresponding path program 10 times [2021-08-21 12:27:52,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:52,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854668885] [2021-08-21 12:27:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:52,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:52,093 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 12:27:52,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:52,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854668885] [2021-08-21 12:27:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854668885] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:52,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:52,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:52,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570330425] [2021-08-21 12:27:52,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:52,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:52,095 INFO L87 Difference]: Start difference. First operand 161 states and 452 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:52,175 INFO L93 Difference]: Finished difference Result 340 states and 918 transitions. [2021-08-21 12:27:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:52,177 INFO L225 Difference]: With dead ends: 340 [2021-08-21 12:27:52,177 INFO L226 Difference]: Without dead ends: 325 [2021-08-21 12:27:52,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-21 12:27:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-08-21 12:27:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.841463414634146) internal successors, (466), 164 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 12:27:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-08-21 12:27:52,198 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-08-21 12:27:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-08-21 12:27:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-08-21 12:27:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:52,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:52,199 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 12:27:52,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-21 12:27:52,199 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1020348439, now seen corresponding path program 11 times [2021-08-21 12:27:52,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:52,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107246360] [2021-08-21 12:27:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:52,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:52,254 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 12:27:52,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:52,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107246360] [2021-08-21 12:27:52,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107246360] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:52,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:52,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:52,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617218137] [2021-08-21 12:27:52,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:52,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:52,255 INFO L87 Difference]: Start difference. First operand 165 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:52,373 INFO L93 Difference]: Finished difference Result 335 states and 909 transitions. [2021-08-21 12:27:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:52,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:52,375 INFO L225 Difference]: With dead ends: 335 [2021-08-21 12:27:52,375 INFO L226 Difference]: Without dead ends: 320 [2021-08-21 12:27:52,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-21 12:27:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-08-21 12:27:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-08-21 12:27:52,379 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-08-21 12:27:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:52,379 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-08-21 12:27:52,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-08-21 12:27:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:52,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:52,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:52,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-21 12:27:52,380 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:52,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1984237037, now seen corresponding path program 12 times [2021-08-21 12:27:52,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:52,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312022046] [2021-08-21 12:27:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:52,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:52,440 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 12:27:52,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:52,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312022046] [2021-08-21 12:27:52,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312022046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:52,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:52,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:52,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141343121] [2021-08-21 12:27:52,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:52,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:52,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:52,441 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:52,529 INFO L93 Difference]: Finished difference Result 318 states and 879 transitions. [2021-08-21 12:27:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:52,530 INFO L225 Difference]: With dead ends: 318 [2021-08-21 12:27:52,530 INFO L226 Difference]: Without dead ends: 303 [2021-08-21 12:27:52,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-21 12:27:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-08-21 12:27:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-08-21 12:27:52,534 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-08-21 12:27:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:52,534 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-08-21 12:27:52,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-08-21 12:27:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:52,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:52,534 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 12:27:52,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-21 12:27:52,534 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:52,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1369703401, now seen corresponding path program 13 times [2021-08-21 12:27:52,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:52,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501615833] [2021-08-21 12:27:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:52,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:52,599 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 12:27:52,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:52,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501615833] [2021-08-21 12:27:52,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501615833] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:52,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:52,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:52,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287457037] [2021-08-21 12:27:52,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:52,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:52,600 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:52,720 INFO L93 Difference]: Finished difference Result 385 states and 1046 transitions. [2021-08-21 12:27:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:52,722 INFO L225 Difference]: With dead ends: 385 [2021-08-21 12:27:52,722 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 12:27:52,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 12:27:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-08-21 12:27:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-21 12:27:52,727 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-21 12:27:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:52,727 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-21 12:27:52,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-21 12:27:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:52,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:52,727 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 12:27:52,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-21 12:27:52,728 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash 615247419, now seen corresponding path program 14 times [2021-08-21 12:27:52,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:52,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588751362] [2021-08-21 12:27:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:52,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:52,783 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 12:27:52,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:52,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588751362] [2021-08-21 12:27:52,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588751362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:52,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:52,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:52,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248136630] [2021-08-21 12:27:52,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:52,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:52,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:52,784 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:52,871 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-08-21 12:27:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:52,873 INFO L225 Difference]: With dead ends: 383 [2021-08-21 12:27:52,873 INFO L226 Difference]: Without dead ends: 368 [2021-08-21 12:27:52,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-21 12:27:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-08-21 12:27:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-21 12:27:52,877 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-21 12:27:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:52,877 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-21 12:27:52,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-21 12:27:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:52,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:52,878 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 12:27:52,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-21 12:27:52,878 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:52,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1736644371, now seen corresponding path program 15 times [2021-08-21 12:27:52,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:52,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007794818] [2021-08-21 12:27:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:52,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:52,934 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 12:27:52,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:52,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007794818] [2021-08-21 12:27:52,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007794818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:52,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:52,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:52,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804256000] [2021-08-21 12:27:52,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:52,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:52,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:52,936 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:53,029 INFO L93 Difference]: Finished difference Result 392 states and 1055 transitions. [2021-08-21 12:27:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:53,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:53,031 INFO L225 Difference]: With dead ends: 392 [2021-08-21 12:27:53,031 INFO L226 Difference]: Without dead ends: 377 [2021-08-21 12:27:53,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-21 12:27:53,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-08-21 12:27:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.909090909090909) internal successors, (512), 176 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-08-21 12:27:53,035 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-08-21 12:27:53,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:53,035 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-08-21 12:27:53,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-08-21 12:27:53,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:53,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:53,036 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 12:27:53,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-21 12:27:53,036 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash 776503703, now seen corresponding path program 16 times [2021-08-21 12:27:53,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:53,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390127202] [2021-08-21 12:27:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:53,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:53,087 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 12:27:53,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:53,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390127202] [2021-08-21 12:27:53,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390127202] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:53,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:53,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:53,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198156543] [2021-08-21 12:27:53,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:53,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:53,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:53,089 INFO L87 Difference]: Start difference. First operand 177 states and 512 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:53,177 INFO L93 Difference]: Finished difference Result 376 states and 1032 transitions. [2021-08-21 12:27:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:53,178 INFO L225 Difference]: With dead ends: 376 [2021-08-21 12:27:53,178 INFO L226 Difference]: Without dead ends: 361 [2021-08-21 12:27:53,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:53,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-08-21 12:27:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-08-21 12:27:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-21 12:27:53,182 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-21 12:27:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:53,183 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-21 12:27:53,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-21 12:27:53,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:53,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:53,183 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 12:27:53,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-21 12:27:53,183 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -520856585, now seen corresponding path program 17 times [2021-08-21 12:27:53,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:53,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961369909] [2021-08-21 12:27:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:53,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:53,235 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 12:27:53,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:53,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961369909] [2021-08-21 12:27:53,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961369909] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:53,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:53,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:53,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467154235] [2021-08-21 12:27:53,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:53,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:53,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:53,237 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:53,325 INFO L93 Difference]: Finished difference Result 364 states and 991 transitions. [2021-08-21 12:27:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:53,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:53,326 INFO L225 Difference]: With dead ends: 364 [2021-08-21 12:27:53,327 INFO L226 Difference]: Without dead ends: 349 [2021-08-21 12:27:53,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-21 12:27:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-08-21 12:27:53,330 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 12:27:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-08-21 12:27:53,330 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-08-21 12:27:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:53,331 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-08-21 12:27:53,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-08-21 12:27:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:53,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:53,331 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 12:27:53,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-21 12:27:53,331 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash 826274171, now seen corresponding path program 18 times [2021-08-21 12:27:53,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:53,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112386329] [2021-08-21 12:27:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:53,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:53,382 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 12:27:53,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:53,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112386329] [2021-08-21 12:27:53,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112386329] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:53,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:53,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:53,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997218441] [2021-08-21 12:27:53,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:53,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:53,383 INFO L87 Difference]: Start difference. First operand 176 states and 507 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:53,464 INFO L93 Difference]: Finished difference Result 343 states and 953 transitions. [2021-08-21 12:27:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:53,465 INFO L225 Difference]: With dead ends: 343 [2021-08-21 12:27:53,466 INFO L226 Difference]: Without dead ends: 328 [2021-08-21 12:27:53,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-21 12:27:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-08-21 12:27:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-08-21 12:27:53,469 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-08-21 12:27:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:53,469 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-08-21 12:27:53,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-08-21 12:27:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:53,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:53,470 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 12:27:53,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-21 12:27:53,470 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1248454179, now seen corresponding path program 19 times [2021-08-21 12:27:53,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:53,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170667034] [2021-08-21 12:27:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:53,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:53,529 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 12:27:53,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:53,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170667034] [2021-08-21 12:27:53,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170667034] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:53,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:53,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:53,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843802861] [2021-08-21 12:27:53,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:53,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:53,530 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:53,618 INFO L93 Difference]: Finished difference Result 360 states and 983 transitions. [2021-08-21 12:27:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:53,620 INFO L225 Difference]: With dead ends: 360 [2021-08-21 12:27:53,620 INFO L226 Difference]: Without dead ends: 345 [2021-08-21 12:27:53,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-21 12:27:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-08-21 12:27:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-21 12:27:53,623 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-21 12:27:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:53,624 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-21 12:27:53,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-21 12:27:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:53,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:53,624 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 12:27:53,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-08-21 12:27:53,624 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1971453827, now seen corresponding path program 20 times [2021-08-21 12:27:53,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:53,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957946021] [2021-08-21 12:27:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:53,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:53,676 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 12:27:53,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:53,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957946021] [2021-08-21 12:27:53,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957946021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:53,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:53,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:53,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130973522] [2021-08-21 12:27:53,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:53,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:53,677 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:53,768 INFO L93 Difference]: Finished difference Result 377 states and 1017 transitions. [2021-08-21 12:27:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:53,770 INFO L225 Difference]: With dead ends: 377 [2021-08-21 12:27:53,770 INFO L226 Difference]: Without dead ends: 362 [2021-08-21 12:27:53,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-21 12:27:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-08-21 12:27:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 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 12:27:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-08-21 12:27:53,774 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-08-21 12:27:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:53,774 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-08-21 12:27:53,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-08-21 12:27:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:53,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:53,775 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 12:27:53,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-08-21 12:27:53,775 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:53,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash 13496993, now seen corresponding path program 21 times [2021-08-21 12:27:53,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:53,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139158297] [2021-08-21 12:27:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:53,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:53,824 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 12:27:53,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:53,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139158297] [2021-08-21 12:27:53,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139158297] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:53,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:53,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:53,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344633454] [2021-08-21 12:27:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:53,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:53,825 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:53,909 INFO L93 Difference]: Finished difference Result 354 states and 972 transitions. [2021-08-21 12:27:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:53,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:53,911 INFO L225 Difference]: With dead ends: 354 [2021-08-21 12:27:53,911 INFO L226 Difference]: Without dead ends: 339 [2021-08-21 12:27:53,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-21 12:27:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-08-21 12:27:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-21 12:27:53,915 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-21 12:27:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-21 12:27:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-21 12:27:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:53,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:53,915 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 12:27:53,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-21 12:27:53,916 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash 559046241, now seen corresponding path program 22 times [2021-08-21 12:27:53,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:53,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189715084] [2021-08-21 12:27:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:53,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:53,960 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 12:27:53,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:53,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189715084] [2021-08-21 12:27:53,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189715084] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:53,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:53,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:53,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2285204] [2021-08-21 12:27:53,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:53,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:53,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:53,961 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,058 INFO L93 Difference]: Finished difference Result 409 states and 1106 transitions. [2021-08-21 12:27:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,060 INFO L225 Difference]: With dead ends: 409 [2021-08-21 12:27:54,060 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 12:27:54,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 12:27:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-08-21 12:27:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.910614525139665) internal successors, (521), 179 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 12:27:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-08-21 12:27:54,064 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-08-21 12:27:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,064 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-08-21 12:27:54,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-08-21 12:27:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:54,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,065 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 12:27:54,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-21 12:27:54,065 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1954405597, now seen corresponding path program 23 times [2021-08-21 12:27:54,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:54,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914120139] [2021-08-21 12:27:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:54,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:54,115 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 12:27:54,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:54,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914120139] [2021-08-21 12:27:54,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914120139] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:54,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:54,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:54,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382055874] [2021-08-21 12:27:54,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:54,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:54,116 INFO L87 Difference]: Start difference. First operand 180 states and 521 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,207 INFO L93 Difference]: Finished difference Result 407 states and 1110 transitions. [2021-08-21 12:27:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:54,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,208 INFO L225 Difference]: With dead ends: 407 [2021-08-21 12:27:54,208 INFO L226 Difference]: Without dead ends: 392 [2021-08-21 12:27:54,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-21 12:27:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-08-21 12:27:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9395604395604398) internal successors, (535), 182 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-08-21 12:27:54,212 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-08-21 12:27:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,212 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-08-21 12:27:54,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-08-21 12:27:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:54,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,213 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 12:27:54,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-08-21 12:27:54,213 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1977002145, now seen corresponding path program 24 times [2021-08-21 12:27:54,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:54,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717034022] [2021-08-21 12:27:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:54,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:54,263 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 12:27:54,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:54,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717034022] [2021-08-21 12:27:54,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717034022] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:54,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:54,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:54,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340714836] [2021-08-21 12:27:54,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:54,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:54,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:54,264 INFO L87 Difference]: Start difference. First operand 183 states and 535 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,370 INFO L93 Difference]: Finished difference Result 384 states and 1065 transitions. [2021-08-21 12:27:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:54,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,372 INFO L225 Difference]: With dead ends: 384 [2021-08-21 12:27:54,372 INFO L226 Difference]: Without dead ends: 369 [2021-08-21 12:27:54,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-21 12:27:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-08-21 12:27:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-21 12:27:54,375 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-21 12:27:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,376 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-21 12:27:54,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-21 12:27:54,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:54,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,376 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 12:27:54,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-21 12:27:54,376 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 812835265, now seen corresponding path program 25 times [2021-08-21 12:27:54,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:54,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332179292] [2021-08-21 12:27:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:54,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:54,425 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 12:27:54,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:54,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332179292] [2021-08-21 12:27:54,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332179292] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:54,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:54,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:54,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373520488] [2021-08-21 12:27:54,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:54,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:54,426 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,518 INFO L93 Difference]: Finished difference Result 403 states and 1103 transitions. [2021-08-21 12:27:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:54,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,519 INFO L225 Difference]: With dead ends: 403 [2021-08-21 12:27:54,519 INFO L226 Difference]: Without dead ends: 388 [2021-08-21 12:27:54,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-08-21 12:27:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-08-21 12:27:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-08-21 12:27:54,523 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-08-21 12:27:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,523 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-08-21 12:27:54,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-08-21 12:27:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:54,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,524 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 12:27:54,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-08-21 12:27:54,524 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:54,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:54,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1497181211, now seen corresponding path program 26 times [2021-08-21 12:27:54,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:54,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483007224] [2021-08-21 12:27:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:54,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:54,574 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 12:27:54,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:54,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483007224] [2021-08-21 12:27:54,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483007224] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:54,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:54,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:54,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963299301] [2021-08-21 12:27:54,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:54,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:54,575 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,668 INFO L93 Difference]: Finished difference Result 401 states and 1096 transitions. [2021-08-21 12:27:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,669 INFO L225 Difference]: With dead ends: 401 [2021-08-21 12:27:54,669 INFO L226 Difference]: Without dead ends: 386 [2021-08-21 12:27:54,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-21 12:27:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-08-21 12:27:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-08-21 12:27:54,673 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-08-21 12:27:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,673 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-08-21 12:27:54,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-08-21 12:27:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:54,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,674 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 12:27:54,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-08-21 12:27:54,674 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash -375784259, now seen corresponding path program 27 times [2021-08-21 12:27:54,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:54,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511915728] [2021-08-21 12:27:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:54,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:54,731 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 12:27:54,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:54,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511915728] [2021-08-21 12:27:54,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511915728] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:54,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:54,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:54,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433170927] [2021-08-21 12:27:54,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:54,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:54,732 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,827 INFO L93 Difference]: Finished difference Result 395 states and 1075 transitions. [2021-08-21 12:27:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:54,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,828 INFO L225 Difference]: With dead ends: 395 [2021-08-21 12:27:54,828 INFO L226 Difference]: Without dead ends: 380 [2021-08-21 12:27:54,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-21 12:27:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-08-21 12:27:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9444444444444446) internal successors, (530), 180 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-08-21 12:27:54,832 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-08-21 12:27:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,832 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-08-21 12:27:54,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-08-21 12:27:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:54,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,833 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 12:27:54,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-08-21 12:27:54,833 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1335924927, now seen corresponding path program 28 times [2021-08-21 12:27:54,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:54,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308372879] [2021-08-21 12:27:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:54,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:54,884 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 12:27:54,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:54,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308372879] [2021-08-21 12:27:54,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308372879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:54,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:54,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:54,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100440046] [2021-08-21 12:27:54,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:54,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:54,885 INFO L87 Difference]: Start difference. First operand 181 states and 530 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:54,982 INFO L93 Difference]: Finished difference Result 379 states and 1052 transitions. [2021-08-21 12:27:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:54,983 INFO L225 Difference]: With dead ends: 379 [2021-08-21 12:27:54,983 INFO L226 Difference]: Without dead ends: 364 [2021-08-21 12:27:54,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-21 12:27:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-08-21 12:27:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-08-21 12:27:54,987 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-08-21 12:27:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:54,987 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-08-21 12:27:54,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-08-21 12:27:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:54,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:54,988 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 12:27:54,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-08-21 12:27:54,988 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:54,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1661682081, now seen corresponding path program 29 times [2021-08-21 12:27:54,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:54,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271665348] [2021-08-21 12:27:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:54,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,039 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 12:27:55,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271665348] [2021-08-21 12:27:55,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271665348] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:55,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:55,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:55,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153796308] [2021-08-21 12:27:55,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:55,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:55,040 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:55,131 INFO L93 Difference]: Finished difference Result 363 states and 1003 transitions. [2021-08-21 12:27:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:55,132 INFO L225 Difference]: With dead ends: 363 [2021-08-21 12:27:55,133 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 12:27:55,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 12:27:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-08-21 12:27:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-08-21 12:27:55,136 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-08-21 12:27:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:55,136 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-08-21 12:27:55,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-08-21 12:27:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:55,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:55,137 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 12:27:55,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-08-21 12:27:55,137 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1286154459, now seen corresponding path program 30 times [2021-08-21 12:27:55,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:55,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615521524] [2021-08-21 12:27:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:55,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,203 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 12:27:55,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615521524] [2021-08-21 12:27:55,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615521524] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:55,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:55,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:55,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518625188] [2021-08-21 12:27:55,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:55,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:55,204 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:55,300 INFO L93 Difference]: Finished difference Result 342 states and 965 transitions. [2021-08-21 12:27:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:55,301 INFO L225 Difference]: With dead ends: 342 [2021-08-21 12:27:55,301 INFO L226 Difference]: Without dead ends: 327 [2021-08-21 12:27:55,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-08-21 12:27:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-08-21 12:27:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-08-21 12:27:55,305 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-08-21 12:27:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:55,305 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-08-21 12:27:55,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-08-21 12:27:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:55,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:55,305 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 12:27:55,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-08-21 12:27:55,305 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:55,306 INFO L82 PathProgramCache]: Analyzing trace with hash -545211245, now seen corresponding path program 31 times [2021-08-21 12:27:55,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:55,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054273033] [2021-08-21 12:27:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:55,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:55,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054273033] [2021-08-21 12:27:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054273033] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:55,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:55,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:55,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104991621] [2021-08-21 12:27:55,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:55,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:55,349 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:55,443 INFO L93 Difference]: Finished difference Result 377 states and 1036 transitions. [2021-08-21 12:27:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:55,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:55,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:55,444 INFO L225 Difference]: With dead ends: 377 [2021-08-21 12:27:55,444 INFO L226 Difference]: Without dead ends: 362 [2021-08-21 12:27:55,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-21 12:27:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-08-21 12:27:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9513513513513514) internal successors, (546), 185 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-08-21 12:27:55,448 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-08-21 12:27:55,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:55,448 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-08-21 12:27:55,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-08-21 12:27:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:55,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:55,448 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 12:27:55,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-08-21 12:27:55,448 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:55,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1559974007, now seen corresponding path program 32 times [2021-08-21 12:27:55,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:55,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645593533] [2021-08-21 12:27:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:55,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,497 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 12:27:55,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645593533] [2021-08-21 12:27:55,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645593533] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:55,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:55,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:55,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882191906] [2021-08-21 12:27:55,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:55,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:55,498 INFO L87 Difference]: Start difference. First operand 186 states and 546 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:55,596 INFO L93 Difference]: Finished difference Result 386 states and 1062 transitions. [2021-08-21 12:27:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:55,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:55,598 INFO L225 Difference]: With dead ends: 386 [2021-08-21 12:27:55,598 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 12:27:55,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 12:27:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-08-21 12:27:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.978723404255319) internal successors, (560), 188 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 12:27:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-08-21 12:27:55,601 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-08-21 12:27:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:55,601 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-08-21 12:27:55,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-08-21 12:27:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:55,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:55,602 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 12:27:55,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-21 12:27:55,602 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1582570555, now seen corresponding path program 33 times [2021-08-21 12:27:55,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:55,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035327599] [2021-08-21 12:27:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:55,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,651 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 12:27:55,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035327599] [2021-08-21 12:27:55,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035327599] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:55,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:55,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:55,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094686168] [2021-08-21 12:27:55,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:55,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:55,652 INFO L87 Difference]: Start difference. First operand 189 states and 560 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:55,745 INFO L93 Difference]: Finished difference Result 393 states and 1078 transitions. [2021-08-21 12:27:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:55,746 INFO L225 Difference]: With dead ends: 393 [2021-08-21 12:27:55,746 INFO L226 Difference]: Without dead ends: 378 [2021-08-21 12:27:55,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-21 12:27:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-08-21 12:27:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-08-21 12:27:55,749 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-08-21 12:27:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:55,750 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-08-21 12:27:55,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-08-21 12:27:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:55,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:55,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:55,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-21 12:27:55,750 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash 14936047, now seen corresponding path program 34 times [2021-08-21 12:27:55,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:55,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954031956] [2021-08-21 12:27:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:55,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,794 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 12:27:55,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954031956] [2021-08-21 12:27:55,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954031956] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:55,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:55,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:55,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329993411] [2021-08-21 12:27:55,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:55,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:55,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:55,795 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:55,887 INFO L93 Difference]: Finished difference Result 438 states and 1184 transitions. [2021-08-21 12:27:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:55,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:55,888 INFO L225 Difference]: With dead ends: 438 [2021-08-21 12:27:55,888 INFO L226 Difference]: Without dead ends: 423 [2021-08-21 12:27:55,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-08-21 12:27:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-08-21 12:27:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9456521739130435) internal successors, (542), 184 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-08-21 12:27:55,892 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-08-21 12:27:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:55,892 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-08-21 12:27:55,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-08-21 12:27:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:55,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:55,893 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 12:27:55,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-08-21 12:27:55,893 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash -393760463, now seen corresponding path program 35 times [2021-08-21 12:27:55,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:55,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095896318] [2021-08-21 12:27:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:55,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:55,943 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 12:27:55,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:55,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095896318] [2021-08-21 12:27:55,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095896318] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:55,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:55,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:55,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895431340] [2021-08-21 12:27:55,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:55,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:55,944 INFO L87 Difference]: Start difference. First operand 185 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:56,066 INFO L93 Difference]: Finished difference Result 433 states and 1175 transitions. [2021-08-21 12:27:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:56,067 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:27:56,067 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 12:27:56,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 12:27:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-08-21 12:27:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-08-21 12:27:56,071 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-08-21 12:27:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:56,071 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-08-21 12:27:56,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-08-21 12:27:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:56,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:56,072 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:56,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-08-21 12:27:56,072 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 896621357, now seen corresponding path program 36 times [2021-08-21 12:27:56,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:56,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599716601] [2021-08-21 12:27:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:56,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:56,131 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 12:27:56,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:56,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599716601] [2021-08-21 12:27:56,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599716601] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:56,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:56,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:56,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711237406] [2021-08-21 12:27:56,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:56,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:56,132 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:56,237 INFO L93 Difference]: Finished difference Result 416 states and 1145 transitions. [2021-08-21 12:27:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:56,238 INFO L225 Difference]: With dead ends: 416 [2021-08-21 12:27:56,238 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 12:27:56,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 12:27:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-08-21 12:27:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-08-21 12:27:56,242 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-08-21 12:27:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-08-21 12:27:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-08-21 12:27:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:56,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:56,243 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 12:27:56,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-08-21 12:27:56,243 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:56,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1511154993, now seen corresponding path program 37 times [2021-08-21 12:27:56,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:56,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623353955] [2021-08-21 12:27:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:56,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:56,299 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 12:27:56,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:56,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623353955] [2021-08-21 12:27:56,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623353955] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:56,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:56,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:56,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355854945] [2021-08-21 12:27:56,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:56,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:56,300 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:56,409 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-08-21 12:27:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:56,410 INFO L225 Difference]: With dead ends: 437 [2021-08-21 12:27:56,410 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 12:27:56,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 12:27:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-08-21 12:27:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-08-21 12:27:56,415 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-08-21 12:27:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-08-21 12:27:56,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-08-21 12:27:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:56,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:56,416 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 12:27:56,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-08-21 12:27:56,416 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash -798861483, now seen corresponding path program 38 times [2021-08-21 12:27:56,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:56,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444892334] [2021-08-21 12:27:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:56,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:56,471 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 12:27:56,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:56,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444892334] [2021-08-21 12:27:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444892334] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:56,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:56,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:56,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281765258] [2021-08-21 12:27:56,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:56,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:56,472 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:56,562 INFO L93 Difference]: Finished difference Result 435 states and 1194 transitions. [2021-08-21 12:27:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:56,563 INFO L225 Difference]: With dead ends: 435 [2021-08-21 12:27:56,563 INFO L226 Difference]: Without dead ends: 420 [2021-08-21 12:27:56,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-21 12:27:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-08-21 12:27:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-21 12:27:56,567 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-21 12:27:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:56,567 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-21 12:27:56,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-21 12:27:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:56,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:56,567 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 12:27:56,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-08-21 12:27:56,568 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:56,568 INFO L82 PathProgramCache]: Analyzing trace with hash 322535469, now seen corresponding path program 39 times [2021-08-21 12:27:56,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:56,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69117435] [2021-08-21 12:27:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:56,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:27:56,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:56,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69117435] [2021-08-21 12:27:56,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69117435] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:56,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:56,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:56,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328724110] [2021-08-21 12:27:56,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:56,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:56,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:56,619 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:56,715 INFO L93 Difference]: Finished difference Result 468 states and 1258 transitions. [2021-08-21 12:27:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:56,716 INFO L225 Difference]: With dead ends: 468 [2021-08-21 12:27:56,716 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:27:56,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:56,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:27:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-08-21 12:27:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9782608695652173) internal successors, (548), 184 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-08-21 12:27:56,720 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-08-21 12:27:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:56,720 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-08-21 12:27:56,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-08-21 12:27:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:56,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:56,721 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 12:27:56,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-21 12:27:56,721 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash -637605199, now seen corresponding path program 40 times [2021-08-21 12:27:56,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:56,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238796671] [2021-08-21 12:27:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:56,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:56,772 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 12:27:56,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:56,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238796671] [2021-08-21 12:27:56,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238796671] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:56,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:56,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:56,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920314622] [2021-08-21 12:27:56,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:56,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:56,774 INFO L87 Difference]: Start difference. First operand 185 states and 548 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:56,865 INFO L93 Difference]: Finished difference Result 452 states and 1235 transitions. [2021-08-21 12:27:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:56,866 INFO L225 Difference]: With dead ends: 452 [2021-08-21 12:27:56,867 INFO L226 Difference]: Without dead ends: 437 [2021-08-21 12:27:56,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-21 12:27:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-08-21 12:27:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-21 12:27:56,870 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-21 12:27:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:56,870 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-21 12:27:56,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:56,870 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-21 12:27:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:56,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:56,871 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 12:27:56,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-21 12:27:56,871 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1934965487, now seen corresponding path program 41 times [2021-08-21 12:27:56,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:56,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57437235] [2021-08-21 12:27:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:56,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:56,920 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 12:27:56,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:56,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57437235] [2021-08-21 12:27:56,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57437235] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:56,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:56,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:56,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047256480] [2021-08-21 12:27:56,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:56,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:56,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:56,921 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:57,030 INFO L93 Difference]: Finished difference Result 446 states and 1215 transitions. [2021-08-21 12:27:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:57,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:57,031 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:27:57,031 INFO L226 Difference]: Without dead ends: 431 [2021-08-21 12:27:57,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-21 12:27:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-08-21 12:27:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-08-21 12:27:57,034 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-08-21 12:27:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:57,035 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-08-21 12:27:57,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-08-21 12:27:57,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:57,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:57,035 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 12:27:57,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-08-21 12:27:57,035 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash -587834731, now seen corresponding path program 42 times [2021-08-21 12:27:57,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:57,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050847714] [2021-08-21 12:27:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:57,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:57,085 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 12:27:57,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:57,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050847714] [2021-08-21 12:27:57,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050847714] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:57,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:57,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:57,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196982279] [2021-08-21 12:27:57,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:57,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:57,086 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:57,176 INFO L93 Difference]: Finished difference Result 425 states and 1177 transitions. [2021-08-21 12:27:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:57,178 INFO L225 Difference]: With dead ends: 425 [2021-08-21 12:27:57,178 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 12:27:57,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 12:27:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-08-21 12:27:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9101123595505616) internal successors, (518), 178 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-08-21 12:27:57,181 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-08-21 12:27:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:57,181 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-08-21 12:27:57,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-08-21 12:27:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:57,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:57,181 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 12:27:57,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-21 12:27:57,182 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:57,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1352503261, now seen corresponding path program 43 times [2021-08-21 12:27:57,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:57,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343853265] [2021-08-21 12:27:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:57,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:57,223 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 12:27:57,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:57,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343853265] [2021-08-21 12:27:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343853265] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:57,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:57,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:57,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000006404] [2021-08-21 12:27:57,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:57,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:57,224 INFO L87 Difference]: Start difference. First operand 179 states and 518 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:57,313 INFO L93 Difference]: Finished difference Result 323 states and 889 transitions. [2021-08-21 12:27:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:57,314 INFO L225 Difference]: With dead ends: 323 [2021-08-21 12:27:57,314 INFO L226 Difference]: Without dead ends: 308 [2021-08-21 12:27:57,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-08-21 12:27:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-08-21 12:27:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-08-21 12:27:57,317 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-08-21 12:27:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:57,317 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-08-21 12:27:57,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-08-21 12:27:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:57,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:57,318 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 12:27:57,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-08-21 12:27:57,318 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash 943806751, now seen corresponding path program 44 times [2021-08-21 12:27:57,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:57,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122753632] [2021-08-21 12:27:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:57,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:57,370 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 12:27:57,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:57,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122753632] [2021-08-21 12:27:57,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122753632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:57,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:57,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:57,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096813634] [2021-08-21 12:27:57,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:57,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:57,372 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:57,470 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-08-21 12:27:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:57,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:57,471 INFO L225 Difference]: With dead ends: 353 [2021-08-21 12:27:57,471 INFO L226 Difference]: Without dead ends: 338 [2021-08-21 12:27:57,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-21 12:27:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-08-21 12:27:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-08-21 12:27:57,474 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-08-21 12:27:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:57,474 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-08-21 12:27:57,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-08-21 12:27:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:57,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:57,475 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 12:27:57,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-21 12:27:57,475 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2060778725, now seen corresponding path program 45 times [2021-08-21 12:27:57,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:57,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922609573] [2021-08-21 12:27:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:57,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:57,524 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 12:27:57,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:57,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922609573] [2021-08-21 12:27:57,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922609573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:57,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:57,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:57,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30549560] [2021-08-21 12:27:57,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:57,525 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:57,622 INFO L93 Difference]: Finished difference Result 336 states and 921 transitions. [2021-08-21 12:27:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:57,623 INFO L225 Difference]: With dead ends: 336 [2021-08-21 12:27:57,623 INFO L226 Difference]: Without dead ends: 321 [2021-08-21 12:27:57,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:57,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-21 12:27:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-08-21 12:27:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.901098901098901) internal successors, (528), 182 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-08-21 12:27:57,626 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-08-21 12:27:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:57,626 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-08-21 12:27:57,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-08-21 12:27:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:57,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:57,627 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 12:27:57,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-08-21 12:27:57,627 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -140211165, now seen corresponding path program 46 times [2021-08-21 12:27:57,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:57,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609458256] [2021-08-21 12:27:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:57,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:57,669 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 12:27:57,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:57,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609458256] [2021-08-21 12:27:57,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609458256] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:57,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:57,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:57,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352376487] [2021-08-21 12:27:57,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:57,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:57,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:57,670 INFO L87 Difference]: Start difference. First operand 183 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:57,767 INFO L93 Difference]: Finished difference Result 324 states and 889 transitions. [2021-08-21 12:27:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:57,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:57,768 INFO L225 Difference]: With dead ends: 324 [2021-08-21 12:27:57,768 INFO L226 Difference]: Without dead ends: 309 [2021-08-21 12:27:57,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-21 12:27:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-08-21 12:27:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-08-21 12:27:57,771 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-08-21 12:27:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:57,771 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-08-21 12:27:57,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-08-21 12:27:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:57,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:57,772 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 12:27:57,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-08-21 12:27:57,772 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:57,772 INFO L82 PathProgramCache]: Analyzing trace with hash 790599975, now seen corresponding path program 47 times [2021-08-21 12:27:57,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:57,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80111995] [2021-08-21 12:27:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:57,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:57,821 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 12:27:57,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:57,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80111995] [2021-08-21 12:27:57,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80111995] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:57,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:57,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:57,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066380967] [2021-08-21 12:27:57,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:57,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:57,823 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:57,915 INFO L93 Difference]: Finished difference Result 354 states and 954 transitions. [2021-08-21 12:27:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:57,917 INFO L225 Difference]: With dead ends: 354 [2021-08-21 12:27:57,917 INFO L226 Difference]: Without dead ends: 339 [2021-08-21 12:27:57,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-21 12:27:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-08-21 12:27:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.905263157894737) internal successors, (552), 190 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-08-21 12:27:57,921 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-08-21 12:27:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:57,921 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-08-21 12:27:57,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-08-21 12:27:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:57,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:57,921 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 12:27:57,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-08-21 12:27:57,921 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:57,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2080981795, now seen corresponding path program 48 times [2021-08-21 12:27:57,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:57,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319024659] [2021-08-21 12:27:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:57,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:57,970 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 12:27:57,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:57,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319024659] [2021-08-21 12:27:57,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319024659] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:57,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:57,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:57,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074714176] [2021-08-21 12:27:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:57,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:57,971 INFO L87 Difference]: Start difference. First operand 191 states and 552 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,073 INFO L93 Difference]: Finished difference Result 333 states and 916 transitions. [2021-08-21 12:27:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,074 INFO L225 Difference]: With dead ends: 333 [2021-08-21 12:27:58,074 INFO L226 Difference]: Without dead ends: 318 [2021-08-21 12:27:58,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:27:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-08-21 12:27:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-08-21 12:27:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-08-21 12:27:58,077 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-08-21 12:27:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,077 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-08-21 12:27:58,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-08-21 12:27:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:58,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,077 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 12:27:58,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-08-21 12:27:58,078 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,078 INFO L82 PathProgramCache]: Analyzing trace with hash 424957057, now seen corresponding path program 49 times [2021-08-21 12:27:58,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717038803] [2021-08-21 12:27:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:58,126 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 12:27:58,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:58,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717038803] [2021-08-21 12:27:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717038803] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:58,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:58,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:58,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848478897] [2021-08-21 12:27:58,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:58,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:58,127 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,211 INFO L93 Difference]: Finished difference Result 386 states and 1068 transitions. [2021-08-21 12:27:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:58,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,212 INFO L225 Difference]: With dead ends: 386 [2021-08-21 12:27:58,212 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 12:27:58,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 12:27:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-08-21 12:27:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.922279792746114) internal successors, (564), 193 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-08-21 12:27:58,216 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-08-21 12:27:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,216 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-08-21 12:27:58,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-08-21 12:27:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:58,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,217 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 12:27:58,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-08-21 12:27:58,217 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1885059419, now seen corresponding path program 50 times [2021-08-21 12:27:58,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75875562] [2021-08-21 12:27:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:58,265 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 12:27:58,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:58,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75875562] [2021-08-21 12:27:58,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75875562] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:58,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:58,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:58,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654000801] [2021-08-21 12:27:58,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:58,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:58,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:58,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:58,266 INFO L87 Difference]: Start difference. First operand 194 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,365 INFO L93 Difference]: Finished difference Result 390 states and 1074 transitions. [2021-08-21 12:27:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:58,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,366 INFO L225 Difference]: With dead ends: 390 [2021-08-21 12:27:58,367 INFO L226 Difference]: Without dead ends: 375 [2021-08-21 12:27:58,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-21 12:27:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-08-21 12:27:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-21 12:27:58,370 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-21 12:27:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,370 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-21 12:27:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-21 12:27:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:58,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,371 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 12:27:58,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-08-21 12:27:58,371 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,371 INFO L82 PathProgramCache]: Analyzing trace with hash 801592695, now seen corresponding path program 51 times [2021-08-21 12:27:58,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118918021] [2021-08-21 12:27:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:58,419 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 12:27:58,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:58,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118918021] [2021-08-21 12:27:58,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118918021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:58,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:58,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:58,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855378889] [2021-08-21 12:27:58,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:58,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:58,420 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,502 INFO L93 Difference]: Finished difference Result 386 states and 1060 transitions. [2021-08-21 12:27:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:58,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,503 INFO L225 Difference]: With dead ends: 386 [2021-08-21 12:27:58,503 INFO L226 Difference]: Without dead ends: 371 [2021-08-21 12:27:58,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-21 12:27:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-08-21 12:27:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-21 12:27:58,507 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-21 12:27:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,507 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-21 12:27:58,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-21 12:27:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:58,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,508 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 12:27:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-08-21 12:27:58,508 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1581265029, now seen corresponding path program 52 times [2021-08-21 12:27:58,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106640252] [2021-08-21 12:27:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:58,559 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 12:27:58,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:58,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106640252] [2021-08-21 12:27:58,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106640252] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:58,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:58,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:58,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780136141] [2021-08-21 12:27:58,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:58,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:58,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:58,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:58,560 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,652 INFO L93 Difference]: Finished difference Result 464 states and 1256 transitions. [2021-08-21 12:27:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,653 INFO L225 Difference]: With dead ends: 464 [2021-08-21 12:27:58,653 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 12:27:58,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 12:27:58,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-08-21 12:27:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-08-21 12:27:58,657 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-08-21 12:27:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,657 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-08-21 12:27:58,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-08-21 12:27:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:58,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,658 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 12:27:58,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-08-21 12:27:58,658 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash -728751447, now seen corresponding path program 53 times [2021-08-21 12:27:58,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098207783] [2021-08-21 12:27:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:58,708 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 12:27:58,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:58,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098207783] [2021-08-21 12:27:58,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098207783] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:58,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:58,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:58,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187667648] [2021-08-21 12:27:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:58,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:58,709 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,803 INFO L93 Difference]: Finished difference Result 468 states and 1262 transitions. [2021-08-21 12:27:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,804 INFO L225 Difference]: With dead ends: 468 [2021-08-21 12:27:58,804 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 12:27:58,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 12:27:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-08-21 12:27:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-08-21 12:27:58,808 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-08-21 12:27:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,808 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-08-21 12:27:58,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-08-21 12:27:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:58,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,809 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 12:27:58,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-08-21 12:27:58,809 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash 392645505, now seen corresponding path program 54 times [2021-08-21 12:27:58,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680132834] [2021-08-21 12:27:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:58,859 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 12:27:58,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:58,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680132834] [2021-08-21 12:27:58,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680132834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:58,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:58,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:58,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365021629] [2021-08-21 12:27:58,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:58,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:58,860 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:58,949 INFO L93 Difference]: Finished difference Result 431 states and 1182 transitions. [2021-08-21 12:27:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:58,951 INFO L225 Difference]: With dead ends: 431 [2021-08-21 12:27:58,951 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 12:27:58,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 12:27:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-08-21 12:27:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.948717948717949) internal successors, (575), 195 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-08-21 12:27:58,955 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-08-21 12:27:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:58,955 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-08-21 12:27:58,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-08-21 12:27:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:58,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:58,955 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 12:27:58,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-08-21 12:27:58,955 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash -567495163, now seen corresponding path program 55 times [2021-08-21 12:27:58,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:58,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637086858] [2021-08-21 12:27:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:58,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:59,012 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 12:27:59,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:59,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637086858] [2021-08-21 12:27:59,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637086858] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:59,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:59,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:59,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977991212] [2021-08-21 12:27:59,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:59,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:59,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:59,013 INFO L87 Difference]: Start difference. First operand 196 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:59,109 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-08-21 12:27:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:59,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:59,110 INFO L225 Difference]: With dead ends: 415 [2021-08-21 12:27:59,110 INFO L226 Difference]: Without dead ends: 400 [2021-08-21 12:27:59,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-21 12:27:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-08-21 12:27:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-08-21 12:27:59,113 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-08-21 12:27:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:59,114 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-08-21 12:27:59,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-08-21 12:27:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:59,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:59,114 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 12:27:59,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-08-21 12:27:59,114 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1864855451, now seen corresponding path program 56 times [2021-08-21 12:27:59,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:59,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508347886] [2021-08-21 12:27:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:59,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:59,164 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 12:27:59,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:59,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508347886] [2021-08-21 12:27:59,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508347886] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:59,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:59,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:59,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868831899] [2021-08-21 12:27:59,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:59,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:59,165 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:59,263 INFO L93 Difference]: Finished difference Result 449 states and 1229 transitions. [2021-08-21 12:27:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:59,264 INFO L225 Difference]: With dead ends: 449 [2021-08-21 12:27:59,264 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 12:27:59,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 12:27:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-08-21 12:27:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-08-21 12:27:59,268 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-08-21 12:27:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:59,268 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-08-21 12:27:59,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-08-21 12:27:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:59,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:59,269 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 12:27:59,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-08-21 12:27:59,269 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash -517724695, now seen corresponding path program 57 times [2021-08-21 12:27:59,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:59,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381187096] [2021-08-21 12:27:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:59,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:59,318 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 12:27:59,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:59,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381187096] [2021-08-21 12:27:59,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381187096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:59,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:59,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:59,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844809146] [2021-08-21 12:27:59,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:59,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:59,319 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:59,410 INFO L93 Difference]: Finished difference Result 428 states and 1191 transitions. [2021-08-21 12:27:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:59,411 INFO L225 Difference]: With dead ends: 428 [2021-08-21 12:27:59,411 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 12:27:59,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:27:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 12:27:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-08-21 12:27:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-21 12:27:59,415 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-21 12:27:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-21 12:27:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-21 12:27:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:59,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:59,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:59,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-08-21 12:27:59,416 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash -57893061, now seen corresponding path program 58 times [2021-08-21 12:27:59,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:59,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83434818] [2021-08-21 12:27:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:59,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:59,459 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 12:27:59,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:59,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83434818] [2021-08-21 12:27:59,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83434818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:59,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:59,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:59,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711577149] [2021-08-21 12:27:59,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:59,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:59,460 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:59,547 INFO L93 Difference]: Finished difference Result 429 states and 1161 transitions. [2021-08-21 12:27:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:59,549 INFO L225 Difference]: With dead ends: 429 [2021-08-21 12:27:59,549 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 12:27:59,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 12:27:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-08-21 12:27:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.911917098445596) internal successors, (562), 193 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-08-21 12:27:59,553 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-08-21 12:27:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:59,553 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-08-21 12:27:59,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-08-21 12:27:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:59,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:59,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:27:59,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-08-21 12:27:59,553 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1267518793, now seen corresponding path program 59 times [2021-08-21 12:27:59,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:59,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199925001] [2021-08-21 12:27:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:59,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:59,602 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 12:27:59,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:59,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199925001] [2021-08-21 12:27:59,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199925001] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:59,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:59,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:59,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425379421] [2021-08-21 12:27:59,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:59,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:59,603 INFO L87 Difference]: Start difference. First operand 194 states and 562 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:59,707 INFO L93 Difference]: Finished difference Result 430 states and 1172 transitions. [2021-08-21 12:27:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:59,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:59,708 INFO L225 Difference]: With dead ends: 430 [2021-08-21 12:27:59,709 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:27:59,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:27:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-08-21 12:27:59,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.928205128205128) internal successors, (571), 195 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-08-21 12:27:59,712 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-08-21 12:27:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:59,712 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-08-21 12:27:59,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-08-21 12:27:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:59,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:59,713 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 12:27:59,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-08-21 12:27:59,713 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash 79611963, now seen corresponding path program 60 times [2021-08-21 12:27:59,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:59,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967251728] [2021-08-21 12:27:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:59,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:59,762 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 12:27:59,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:59,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967251728] [2021-08-21 12:27:59,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967251728] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:59,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:59,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:59,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121761726] [2021-08-21 12:27:59,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:59,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:59,763 INFO L87 Difference]: Start difference. First operand 196 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:27:59,853 INFO L93 Difference]: Finished difference Result 409 states and 1134 transitions. [2021-08-21 12:27:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:27:59,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:27:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:27:59,855 INFO L225 Difference]: With dead ends: 409 [2021-08-21 12:27:59,855 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 12:27:59,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:27:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 12:27:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-08-21 12:27:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-08-21 12:27:59,858 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-08-21 12:27:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:27:59,858 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-08-21 12:27:59,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:27:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-08-21 12:27:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:27:59,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:27:59,859 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 12:27:59,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-08-21 12:27:59,859 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:27:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:27:59,859 INFO L82 PathProgramCache]: Analyzing trace with hash -914182639, now seen corresponding path program 61 times [2021-08-21 12:27:59,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:27:59,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246376951] [2021-08-21 12:27:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:27:59,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:27:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:27:59,901 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 12:27:59,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:27:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246376951] [2021-08-21 12:27:59,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246376951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:27:59,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:27:59,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:27:59,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997498047] [2021-08-21 12:27:59,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:27:59,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:27:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:27:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:27:59,902 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,004 INFO L93 Difference]: Finished difference Result 328 states and 903 transitions. [2021-08-21 12:28:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,005 INFO L225 Difference]: With dead ends: 328 [2021-08-21 12:28:00,005 INFO L226 Difference]: Without dead ends: 313 [2021-08-21 12:28:00,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-21 12:28:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-08-21 12:28:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-08-21 12:28:00,009 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-08-21 12:28:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,009 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-08-21 12:28:00,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-08-21 12:28:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:00,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,010 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:00,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-08-21 12:28:00,010 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1637182287, now seen corresponding path program 62 times [2021-08-21 12:28:00,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623442235] [2021-08-21 12:28:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,057 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 12:28:00,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623442235] [2021-08-21 12:28:00,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623442235] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:00,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:00,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:00,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982067329] [2021-08-21 12:28:00,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:00,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:00,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:00,058 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,156 INFO L93 Difference]: Finished difference Result 357 states and 963 transitions. [2021-08-21 12:28:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,157 INFO L225 Difference]: With dead ends: 357 [2021-08-21 12:28:00,157 INFO L226 Difference]: Without dead ends: 342 [2021-08-21 12:28:00,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-08-21 12:28:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-08-21 12:28:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 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 12:28:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-08-21 12:28:00,161 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-08-21 12:28:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,161 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-08-21 12:28:00,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-08-21 12:28:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:00,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,161 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 12:28:00,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-08-21 12:28:00,161 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash 347768533, now seen corresponding path program 63 times [2021-08-21 12:28:00,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176000427] [2021-08-21 12:28:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,208 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 12:28:00,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176000427] [2021-08-21 12:28:00,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176000427] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:00,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:00,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:00,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751809233] [2021-08-21 12:28:00,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:00,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:00,210 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,312 INFO L93 Difference]: Finished difference Result 334 states and 918 transitions. [2021-08-21 12:28:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,313 INFO L225 Difference]: With dead ends: 334 [2021-08-21 12:28:00,313 INFO L226 Difference]: Without dead ends: 319 [2021-08-21 12:28:00,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-21 12:28:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-08-21 12:28:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-21 12:28:00,316 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-21 12:28:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,316 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-21 12:28:00,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-21 12:28:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:00,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,317 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 12:28:00,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-08-21 12:28:00,317 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1049436965, now seen corresponding path program 64 times [2021-08-21 12:28:00,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965399791] [2021-08-21 12:28:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,365 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 12:28:00,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965399791] [2021-08-21 12:28:00,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965399791] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:00,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:00,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:00,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863562635] [2021-08-21 12:28:00,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:00,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:00,366 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,463 INFO L93 Difference]: Finished difference Result 349 states and 945 transitions. [2021-08-21 12:28:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,464 INFO L225 Difference]: With dead ends: 349 [2021-08-21 12:28:00,464 INFO L226 Difference]: Without dead ends: 334 [2021-08-21 12:28:00,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-21 12:28:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-08-21 12:28:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 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 12:28:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-08-21 12:28:00,468 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-08-21 12:28:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,468 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-08-21 12:28:00,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-08-21 12:28:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:00,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,469 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 12:28:00,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-08-21 12:28:00,469 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,469 INFO L82 PathProgramCache]: Analyzing trace with hash 935513855, now seen corresponding path program 65 times [2021-08-21 12:28:00,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758055696] [2021-08-21 12:28:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,516 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 12:28:00,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758055696] [2021-08-21 12:28:00,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758055696] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:00,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:00,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:00,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512256048] [2021-08-21 12:28:00,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:00,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:00,517 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,616 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-08-21 12:28:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,617 INFO L225 Difference]: With dead ends: 353 [2021-08-21 12:28:00,617 INFO L226 Difference]: Without dead ends: 338 [2021-08-21 12:28:00,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-08-21 12:28:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-08-21 12:28:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-08-21 12:28:00,621 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-08-21 12:28:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,621 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-08-21 12:28:00,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-08-21 12:28:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:00,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,622 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 12:28:00,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-21 12:28:00,622 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,622 INFO L82 PathProgramCache]: Analyzing trace with hash -672801327, now seen corresponding path program 66 times [2021-08-21 12:28:00,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538458217] [2021-08-21 12:28:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,663 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 12:28:00,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538458217] [2021-08-21 12:28:00,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538458217] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:00,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:00,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:00,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429400588] [2021-08-21 12:28:00,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:00,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:00,664 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,752 INFO L93 Difference]: Finished difference Result 324 states and 891 transitions. [2021-08-21 12:28:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,753 INFO L225 Difference]: With dead ends: 324 [2021-08-21 12:28:00,753 INFO L226 Difference]: Without dead ends: 309 [2021-08-21 12:28:00,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-21 12:28:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-08-21 12:28:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-21 12:28:00,757 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-21 12:28:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,757 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-21 12:28:00,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-21 12:28:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:00,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,757 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 12:28:00,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-21 12:28:00,757 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash 571626125, now seen corresponding path program 67 times [2021-08-21 12:28:00,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949983051] [2021-08-21 12:28:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,801 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 12:28:00,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949983051] [2021-08-21 12:28:00,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949983051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:00,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:00,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:00,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919258121] [2021-08-21 12:28:00,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:00,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:00,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:00,803 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:00,889 INFO L93 Difference]: Finished difference Result 442 states and 1201 transitions. [2021-08-21 12:28:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:00,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:00,889 INFO L225 Difference]: With dead ends: 442 [2021-08-21 12:28:00,890 INFO L226 Difference]: Without dead ends: 427 [2021-08-21 12:28:00,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-21 12:28:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-08-21 12:28:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-08-21 12:28:00,893 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-08-21 12:28:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:00,893 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-08-21 12:28:00,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-08-21 12:28:00,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:00,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:00,894 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 12:28:00,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-08-21 12:28:00,894 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:00,894 INFO L82 PathProgramCache]: Analyzing trace with hash -151373523, now seen corresponding path program 68 times [2021-08-21 12:28:00,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:00,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067660962] [2021-08-21 12:28:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:00,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:00,948 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 12:28:00,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:00,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067660962] [2021-08-21 12:28:00,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067660962] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:00,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:00,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:00,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078861184] [2021-08-21 12:28:00,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:00,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:00,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:00,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:00,949 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:01,044 INFO L93 Difference]: Finished difference Result 465 states and 1248 transitions. [2021-08-21 12:28:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:01,046 INFO L225 Difference]: With dead ends: 465 [2021-08-21 12:28:01,046 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 12:28:01,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 12:28:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-08-21 12:28:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 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 12:28:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-08-21 12:28:01,051 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-08-21 12:28:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:01,051 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-08-21 12:28:01,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-08-21 12:28:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:01,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:01,052 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 12:28:01,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-21 12:28:01,052 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:01,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1833577297, now seen corresponding path program 69 times [2021-08-21 12:28:01,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:01,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407426811] [2021-08-21 12:28:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:01,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:01,105 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 12:28:01,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:01,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407426811] [2021-08-21 12:28:01,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407426811] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:01,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:01,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:01,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779501225] [2021-08-21 12:28:01,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:01,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:01,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:01,106 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:01,210 INFO L93 Difference]: Finished difference Result 442 states and 1203 transitions. [2021-08-21 12:28:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:01,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:01,211 INFO L225 Difference]: With dead ends: 442 [2021-08-21 12:28:01,211 INFO L226 Difference]: Without dead ends: 427 [2021-08-21 12:28:01,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-21 12:28:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-08-21 12:28:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-21 12:28:01,215 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-21 12:28:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:01,215 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-21 12:28:01,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-21 12:28:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:01,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:01,215 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 12:28:01,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-08-21 12:28:01,215 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1915840751, now seen corresponding path program 70 times [2021-08-21 12:28:01,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:01,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392921920] [2021-08-21 12:28:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:01,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:01,257 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 12:28:01,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:01,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392921920] [2021-08-21 12:28:01,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392921920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:01,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:01,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:01,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522744867] [2021-08-21 12:28:01,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:01,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:01,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:01,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:01,258 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:01,361 INFO L93 Difference]: Finished difference Result 393 states and 1085 transitions. [2021-08-21 12:28:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:01,362 INFO L225 Difference]: With dead ends: 393 [2021-08-21 12:28:01,362 INFO L226 Difference]: Without dead ends: 378 [2021-08-21 12:28:01,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-08-21 12:28:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-08-21 12:28:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 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 12:28:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-08-21 12:28:01,365 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-08-21 12:28:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:01,365 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-08-21 12:28:01,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,365 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-08-21 12:28:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:01,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:01,366 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 12:28:01,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-08-21 12:28:01,366 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:01,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:01,366 INFO L82 PathProgramCache]: Analyzing trace with hash -520481395, now seen corresponding path program 71 times [2021-08-21 12:28:01,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:01,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895989593] [2021-08-21 12:28:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:01,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:01,416 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 12:28:01,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:01,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895989593] [2021-08-21 12:28:01,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895989593] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:01,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:01,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:01,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211272786] [2021-08-21 12:28:01,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:01,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:01,417 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:01,515 INFO L93 Difference]: Finished difference Result 391 states and 1089 transitions. [2021-08-21 12:28:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:01,516 INFO L225 Difference]: With dead ends: 391 [2021-08-21 12:28:01,516 INFO L226 Difference]: Without dead ends: 376 [2021-08-21 12:28:01,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-08-21 12:28:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-08-21 12:28:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.955223880597015) internal successors, (594), 201 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-08-21 12:28:01,519 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-08-21 12:28:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:01,519 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-08-21 12:28:01,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-08-21 12:28:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:01,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:01,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:01,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-21 12:28:01,520 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash -497884847, now seen corresponding path program 72 times [2021-08-21 12:28:01,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:01,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483612585] [2021-08-21 12:28:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:01,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:01,568 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 12:28:01,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:01,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483612585] [2021-08-21 12:28:01,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483612585] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:01,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:01,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:01,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890279237] [2021-08-21 12:28:01,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:01,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:01,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:01,569 INFO L87 Difference]: Start difference. First operand 202 states and 594 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:01,663 INFO L93 Difference]: Finished difference Result 368 states and 1044 transitions. [2021-08-21 12:28:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:01,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:01,664 INFO L225 Difference]: With dead ends: 368 [2021-08-21 12:28:01,664 INFO L226 Difference]: Without dead ends: 353 [2021-08-21 12:28:01,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-21 12:28:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-08-21 12:28:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-21 12:28:01,668 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-21 12:28:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:01,668 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-21 12:28:01,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-21 12:28:01,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:01,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:01,668 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 12:28:01,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-08-21 12:28:01,668 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:01,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1662051727, now seen corresponding path program 73 times [2021-08-21 12:28:01,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:01,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301215721] [2021-08-21 12:28:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:01,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:01,722 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 12:28:01,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:01,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301215721] [2021-08-21 12:28:01,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301215721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:01,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:01,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:01,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759408168] [2021-08-21 12:28:01,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:01,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:01,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:01,723 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:01,822 INFO L93 Difference]: Finished difference Result 445 states and 1229 transitions. [2021-08-21 12:28:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:01,823 INFO L225 Difference]: With dead ends: 445 [2021-08-21 12:28:01,823 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 12:28:01,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 12:28:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-08-21 12:28:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-21 12:28:01,826 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-21 12:28:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:01,826 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-21 12:28:01,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-21 12:28:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:01,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:01,827 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 12:28:01,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-08-21 12:28:01,827 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 322899093, now seen corresponding path program 74 times [2021-08-21 12:28:01,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:01,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686609993] [2021-08-21 12:28:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:01,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:01,876 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 12:28:01,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:01,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686609993] [2021-08-21 12:28:01,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686609993] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:01,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:01,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:01,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610583291] [2021-08-21 12:28:01,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:01,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:01,877 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:01,978 INFO L93 Difference]: Finished difference Result 443 states and 1222 transitions. [2021-08-21 12:28:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:01,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:01,979 INFO L225 Difference]: With dead ends: 443 [2021-08-21 12:28:01,980 INFO L226 Difference]: Without dead ends: 428 [2021-08-21 12:28:01,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-21 12:28:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-08-21 12:28:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-21 12:28:01,983 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-21 12:28:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:01,983 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-21 12:28:01,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-21 12:28:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:01,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:01,984 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 12:28:01,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-08-21 12:28:01,984 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1444296045, now seen corresponding path program 75 times [2021-08-21 12:28:01,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:01,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765441721] [2021-08-21 12:28:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:01,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:02,036 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 12:28:02,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:02,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765441721] [2021-08-21 12:28:02,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765441721] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:02,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:02,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:02,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614047358] [2021-08-21 12:28:02,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:02,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:02,037 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:02,141 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-08-21 12:28:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:02,142 INFO L225 Difference]: With dead ends: 437 [2021-08-21 12:28:02,142 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 12:28:02,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 12:28:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-08-21 12:28:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-08-21 12:28:02,146 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-08-21 12:28:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-08-21 12:28:02,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-08-21 12:28:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:02,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:02,146 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 12:28:02,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-08-21 12:28:02,147 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash 484155377, now seen corresponding path program 76 times [2021-08-21 12:28:02,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:02,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533149152] [2021-08-21 12:28:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:02,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:02,195 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 12:28:02,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:02,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533149152] [2021-08-21 12:28:02,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533149152] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:02,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:02,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:02,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446188051] [2021-08-21 12:28:02,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:02,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:02,196 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:02,299 INFO L93 Difference]: Finished difference Result 421 states and 1178 transitions. [2021-08-21 12:28:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:02,300 INFO L225 Difference]: With dead ends: 421 [2021-08-21 12:28:02,300 INFO L226 Difference]: Without dead ends: 406 [2021-08-21 12:28:02,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-21 12:28:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-08-21 12:28:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-21 12:28:02,303 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-21 12:28:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:02,303 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-21 12:28:02,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-21 12:28:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:02,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:02,304 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 12:28:02,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-08-21 12:28:02,304 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash -813204911, now seen corresponding path program 77 times [2021-08-21 12:28:02,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:02,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379630099] [2021-08-21 12:28:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:02,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:02,353 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 12:28:02,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:02,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379630099] [2021-08-21 12:28:02,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379630099] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:02,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:02,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:02,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852037072] [2021-08-21 12:28:02,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:02,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:02,354 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:02,440 INFO L93 Difference]: Finished difference Result 405 states and 1129 transitions. [2021-08-21 12:28:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:02,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:02,441 INFO L225 Difference]: With dead ends: 405 [2021-08-21 12:28:02,441 INFO L226 Difference]: Without dead ends: 390 [2021-08-21 12:28:02,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-21 12:28:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-08-21 12:28:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-21 12:28:02,444 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-21 12:28:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:02,444 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-21 12:28:02,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-21 12:28:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:02,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:02,445 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 12:28:02,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-08-21 12:28:02,445 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash 533925845, now seen corresponding path program 78 times [2021-08-21 12:28:02,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:02,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839620760] [2021-08-21 12:28:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:02,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:02,495 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 12:28:02,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:02,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839620760] [2021-08-21 12:28:02,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839620760] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:02,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:02,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:02,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955934543] [2021-08-21 12:28:02,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:02,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:02,496 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:02,580 INFO L93 Difference]: Finished difference Result 384 states and 1091 transitions. [2021-08-21 12:28:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:02,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:02,580 INFO L225 Difference]: With dead ends: 384 [2021-08-21 12:28:02,581 INFO L226 Difference]: Without dead ends: 369 [2021-08-21 12:28:02,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-21 12:28:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-08-21 12:28:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-21 12:28:02,584 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-21 12:28:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:02,584 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-21 12:28:02,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-21 12:28:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:02,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:02,584 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 12:28:02,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-08-21 12:28:02,584 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash -635821033, now seen corresponding path program 79 times [2021-08-21 12:28:02,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:02,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412142393] [2021-08-21 12:28:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:02,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:02,633 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 12:28:02,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:02,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412142393] [2021-08-21 12:28:02,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412142393] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:02,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:02,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:02,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999358253] [2021-08-21 12:28:02,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:02,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:02,634 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:02,738 INFO L93 Difference]: Finished difference Result 425 states and 1163 transitions. [2021-08-21 12:28:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:02,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:02,738 INFO L225 Difference]: With dead ends: 425 [2021-08-21 12:28:02,739 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 12:28:02,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 12:28:02,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-08-21 12:28:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 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 12:28:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-08-21 12:28:02,742 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-08-21 12:28:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:02,742 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-08-21 12:28:02,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-08-21 12:28:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:02,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:02,742 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 12:28:02,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-08-21 12:28:02,743 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:02,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1349129787, now seen corresponding path program 80 times [2021-08-21 12:28:02,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:02,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937350191] [2021-08-21 12:28:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:02,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:02,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:02,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937350191] [2021-08-21 12:28:02,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937350191] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:02,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:02,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:02,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234058545] [2021-08-21 12:28:02,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:02,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:02,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:02,791 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:02,885 INFO L93 Difference]: Finished difference Result 429 states and 1169 transitions. [2021-08-21 12:28:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:02,886 INFO L225 Difference]: With dead ends: 429 [2021-08-21 12:28:02,886 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 12:28:02,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 12:28:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-08-21 12:28:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-08-21 12:28:02,896 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-08-21 12:28:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:02,896 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-08-21 12:28:02,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-08-21 12:28:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:02,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:02,896 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 12:28:02,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-08-21 12:28:02,897 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash -259185395, now seen corresponding path program 81 times [2021-08-21 12:28:02,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:02,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774767638] [2021-08-21 12:28:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:02,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:02,938 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 12:28:02,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:02,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774767638] [2021-08-21 12:28:02,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774767638] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:02,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:02,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:02,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416381705] [2021-08-21 12:28:02,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:02,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:02,939 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:03,025 INFO L93 Difference]: Finished difference Result 429 states and 1163 transitions. [2021-08-21 12:28:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:03,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:03,026 INFO L225 Difference]: With dead ends: 429 [2021-08-21 12:28:03,026 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 12:28:03,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:03,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 12:28:03,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-08-21 12:28:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-21 12:28:03,029 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-21 12:28:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:03,029 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-21 12:28:03,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,029 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-21 12:28:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:03,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:03,030 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 12:28:03,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-08-21 12:28:03,030 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:03,030 INFO L82 PathProgramCache]: Analyzing trace with hash 520486939, now seen corresponding path program 82 times [2021-08-21 12:28:03,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:03,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192909115] [2021-08-21 12:28:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:03,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:03,086 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 12:28:03,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:03,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192909115] [2021-08-21 12:28:03,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192909115] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:03,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:03,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:03,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854595698] [2021-08-21 12:28:03,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:03,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:03,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:03,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:03,088 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:03,183 INFO L93 Difference]: Finished difference Result 451 states and 1224 transitions. [2021-08-21 12:28:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:03,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:03,184 INFO L225 Difference]: With dead ends: 451 [2021-08-21 12:28:03,184 INFO L226 Difference]: Without dead ends: 436 [2021-08-21 12:28:03,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-21 12:28:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-08-21 12:28:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-21 12:28:03,190 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-21 12:28:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:03,190 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-21 12:28:03,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-21 12:28:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:03,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:03,190 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 12:28:03,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-08-21 12:28:03,191 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:03,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1789529537, now seen corresponding path program 83 times [2021-08-21 12:28:03,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:03,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047886289] [2021-08-21 12:28:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:03,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:03,247 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 12:28:03,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:03,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047886289] [2021-08-21 12:28:03,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047886289] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:03,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:03,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:03,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575601333] [2021-08-21 12:28:03,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:03,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:03,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:03,248 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:03,345 INFO L93 Difference]: Finished difference Result 455 states and 1230 transitions. [2021-08-21 12:28:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:03,346 INFO L225 Difference]: With dead ends: 455 [2021-08-21 12:28:03,346 INFO L226 Difference]: Without dead ends: 440 [2021-08-21 12:28:03,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-21 12:28:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-08-21 12:28:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-21 12:28:03,349 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-21 12:28:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:03,349 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-21 12:28:03,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-21 12:28:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:03,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:03,350 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 12:28:03,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-08-21 12:28:03,350 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -668132585, now seen corresponding path program 84 times [2021-08-21 12:28:03,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:03,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427312249] [2021-08-21 12:28:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:03,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:03,399 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 12:28:03,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:03,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427312249] [2021-08-21 12:28:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427312249] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:03,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:03,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:03,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587722821] [2021-08-21 12:28:03,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:03,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:03,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:03,400 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:03,498 INFO L93 Difference]: Finished difference Result 422 states and 1158 transitions. [2021-08-21 12:28:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:03,499 INFO L225 Difference]: With dead ends: 422 [2021-08-21 12:28:03,499 INFO L226 Difference]: Without dead ends: 407 [2021-08-21 12:28:03,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-21 12:28:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-08-21 12:28:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-08-21 12:28:03,502 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-08-21 12:28:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:03,502 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-08-21 12:28:03,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-08-21 12:28:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:03,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:03,502 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 12:28:03,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-08-21 12:28:03,503 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1628273253, now seen corresponding path program 85 times [2021-08-21 12:28:03,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:03,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969057019] [2021-08-21 12:28:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:03,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:03,552 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 12:28:03,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:03,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969057019] [2021-08-21 12:28:03,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969057019] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:03,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:03,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:03,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681707687] [2021-08-21 12:28:03,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:03,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:03,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:03,553 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:03,638 INFO L93 Difference]: Finished difference Result 406 states and 1135 transitions. [2021-08-21 12:28:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:03,639 INFO L225 Difference]: With dead ends: 406 [2021-08-21 12:28:03,639 INFO L226 Difference]: Without dead ends: 391 [2021-08-21 12:28:03,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-21 12:28:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-08-21 12:28:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-08-21 12:28:03,642 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-08-21 12:28:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:03,642 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-08-21 12:28:03,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-08-21 12:28:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:03,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:03,643 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 12:28:03,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-08-21 12:28:03,643 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1369333755, now seen corresponding path program 86 times [2021-08-21 12:28:03,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:03,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136420815] [2021-08-21 12:28:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:03,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:03,692 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 12:28:03,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136420815] [2021-08-21 12:28:03,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136420815] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:03,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:03,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:03,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557261137] [2021-08-21 12:28:03,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:03,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:03,693 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:03,785 INFO L93 Difference]: Finished difference Result 440 states and 1205 transitions. [2021-08-21 12:28:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:03,786 INFO L225 Difference]: With dead ends: 440 [2021-08-21 12:28:03,786 INFO L226 Difference]: Without dead ends: 425 [2021-08-21 12:28:03,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-08-21 12:28:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-08-21 12:28:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-08-21 12:28:03,789 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-08-21 12:28:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:03,789 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-08-21 12:28:03,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-08-21 12:28:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:03,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:03,789 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 12:28:03,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-08-21 12:28:03,790 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:03,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1578502785, now seen corresponding path program 87 times [2021-08-21 12:28:03,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:03,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396567450] [2021-08-21 12:28:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:03,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:03,843 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 12:28:03,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:03,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396567450] [2021-08-21 12:28:03,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396567450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:03,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:03,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:03,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345583905] [2021-08-21 12:28:03,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:03,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:03,844 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:03,943 INFO L93 Difference]: Finished difference Result 419 states and 1167 transitions. [2021-08-21 12:28:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:03,944 INFO L225 Difference]: With dead ends: 419 [2021-08-21 12:28:03,944 INFO L226 Difference]: Without dead ends: 404 [2021-08-21 12:28:03,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-21 12:28:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-08-21 12:28:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-08-21 12:28:03,947 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-08-21 12:28:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:03,947 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-08-21 12:28:03,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-08-21 12:28:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:03,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:03,948 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 12:28:03,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-08-21 12:28:03,948 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:03,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1118671151, now seen corresponding path program 88 times [2021-08-21 12:28:03,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:03,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121575124] [2021-08-21 12:28:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:03,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:03,990 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 12:28:03,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:03,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121575124] [2021-08-21 12:28:03,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121575124] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:03,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:03,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:03,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614507033] [2021-08-21 12:28:03,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:03,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:03,991 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:04,083 INFO L93 Difference]: Finished difference Result 382 states and 1052 transitions. [2021-08-21 12:28:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:04,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:04,084 INFO L225 Difference]: With dead ends: 382 [2021-08-21 12:28:04,084 INFO L226 Difference]: Without dead ends: 367 [2021-08-21 12:28:04,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-21 12:28:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-08-21 12:28:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-08-21 12:28:04,087 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-08-21 12:28:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:04,088 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-08-21 12:28:04,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-08-21 12:28:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:04,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:04,088 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 12:28:04,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-08-21 12:28:04,088 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:04,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1966670413, now seen corresponding path program 89 times [2021-08-21 12:28:04,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:04,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287481657] [2021-08-21 12:28:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:04,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:04,137 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 12:28:04,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:04,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287481657] [2021-08-21 12:28:04,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287481657] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:04,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:04,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:04,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358052450] [2021-08-21 12:28:04,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:04,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:04,139 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:04,237 INFO L93 Difference]: Finished difference Result 383 states and 1063 transitions. [2021-08-21 12:28:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:04,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:04,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:04,238 INFO L225 Difference]: With dead ends: 383 [2021-08-21 12:28:04,238 INFO L226 Difference]: Without dead ends: 368 [2021-08-21 12:28:04,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-21 12:28:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-08-21 12:28:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 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 12:28:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-08-21 12:28:04,242 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-08-21 12:28:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:04,242 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-08-21 12:28:04,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-08-21 12:28:04,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:28:04,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:04,242 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 12:28:04,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-08-21 12:28:04,242 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash -981166127, now seen corresponding path program 90 times [2021-08-21 12:28:04,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:04,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929764468] [2021-08-21 12:28:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:04,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:04,290 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 12:28:04,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:04,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929764468] [2021-08-21 12:28:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929764468] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:28:04,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:28:04,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 12:28:04,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70370725] [2021-08-21 12:28:04,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:04,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:04,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:04,291 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:04,389 INFO L93 Difference]: Finished difference Result 362 states and 1025 transitions. [2021-08-21 12:28:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:28:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:04,390 INFO L225 Difference]: With dead ends: 362 [2021-08-21 12:28:04,390 INFO L226 Difference]: Without dead ends: 347 [2021-08-21 12:28:04,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-08-21 12:28:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-08-21 12:28:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-08-21 12:28:04,393 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-08-21 12:28:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:04,394 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-08-21 12:28:04,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-08-21 12:28:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:04,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:04,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:04,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-08-21 12:28:04,394 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:04,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1951800714, now seen corresponding path program 1 times [2021-08-21 12:28:04,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:04,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872350130] [2021-08-21 12:28:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:04,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:04,466 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 12:28:04,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:04,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872350130] [2021-08-21 12:28:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872350130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:04,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182116788] [2021-08-21 12:28:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:04,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:04,488 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 12:28:04,500 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 12:28:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:04,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:04,892 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 12:28:04,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182116788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:04,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:04,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:04,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663803043] [2021-08-21 12:28:04,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:04,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:04,893 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:05,122 INFO L93 Difference]: Finished difference Result 365 states and 1007 transitions. [2021-08-21 12:28:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:05,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:05,123 INFO L225 Difference]: With dead ends: 365 [2021-08-21 12:28:05,123 INFO L226 Difference]: Without dead ends: 325 [2021-08-21 12:28:05,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-21 12:28:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 200. [2021-08-21 12:28:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.899497487437186) internal successors, (577), 199 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 577 transitions. [2021-08-21 12:28:05,127 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 577 transitions. Word has length 18 [2021-08-21 12:28:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:05,127 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 577 transitions. [2021-08-21 12:28:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 577 transitions. [2021-08-21 12:28:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:05,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:05,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:05,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:05,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:28:05,365 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash 690829094, now seen corresponding path program 1 times [2021-08-21 12:28:05,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:05,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956668441] [2021-08-21 12:28:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:05,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:05,430 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 12:28:05,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:05,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956668441] [2021-08-21 12:28:05,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956668441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:05,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565785209] [2021-08-21 12:28:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:05,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:05,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:05,447 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 12:28:05,486 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 12:28:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:05,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565785209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:05,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:05,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:28:05,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791719399] [2021-08-21 12:28:05,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:28:05,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:28:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:28:05,744 INFO L87 Difference]: Start difference. First operand 200 states and 577 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:05,846 INFO L93 Difference]: Finished difference Result 372 states and 1038 transitions. [2021-08-21 12:28:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:05,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:05,847 INFO L225 Difference]: With dead ends: 372 [2021-08-21 12:28:05,847 INFO L226 Difference]: Without dead ends: 313 [2021-08-21 12:28:05,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-21 12:28:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 218. [2021-08-21 12:28:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.866359447004608) internal successors, (622), 217 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 622 transitions. [2021-08-21 12:28:05,850 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 622 transitions. Word has length 18 [2021-08-21 12:28:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:05,850 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 622 transitions. [2021-08-21 12:28:05,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 622 transitions. [2021-08-21 12:28:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:05,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:05,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:05,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 12:28:06,067 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,SelfDestructingSolverStorable123 [2021-08-21 12:28:06,068 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1211921590, now seen corresponding path program 2 times [2021-08-21 12:28:06,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:06,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464686737] [2021-08-21 12:28:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:06,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:06,176 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 12:28:06,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:06,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464686737] [2021-08-21 12:28:06,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464686737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:06,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598109504] [2021-08-21 12:28:06,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:06,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:06,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:06,178 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 12:28:06,179 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 12:28:06,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:06,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:06,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:06,435 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 12:28:06,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598109504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:06,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:06,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-08-21 12:28:06,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139895924] [2021-08-21 12:28:06,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:06,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:06,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:06,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:06,436 INFO L87 Difference]: Start difference. First operand 218 states and 622 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:06,924 INFO L93 Difference]: Finished difference Result 668 states and 1857 transitions. [2021-08-21 12:28:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:28:06,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:06,925 INFO L225 Difference]: With dead ends: 668 [2021-08-21 12:28:06,925 INFO L226 Difference]: Without dead ends: 569 [2021-08-21 12:28:06,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:28:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-21 12:28:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 246. [2021-08-21 12:28:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.987755102040816) internal successors, (732), 245 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 732 transitions. [2021-08-21 12:28:06,930 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 732 transitions. Word has length 18 [2021-08-21 12:28:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:06,931 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 732 transitions. [2021-08-21 12:28:06,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 732 transitions. [2021-08-21 12:28:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:06,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:06,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:06,955 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 12:28:07,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:07,152 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash -617870236, now seen corresponding path program 3 times [2021-08-21 12:28:07,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:07,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912385513] [2021-08-21 12:28:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:07,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:07,243 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 12:28:07,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:07,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912385513] [2021-08-21 12:28:07,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912385513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:07,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636551940] [2021-08-21 12:28:07,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:07,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:07,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:07,265 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 12:28:07,265 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 12:28:07,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:28:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:07,524 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 12:28:07,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636551940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:07,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:07,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:28:07,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113880152] [2021-08-21 12:28:07,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:28:07,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:28:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:07,526 INFO L87 Difference]: Start difference. First operand 246 states and 732 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:07,967 INFO L93 Difference]: Finished difference Result 651 states and 1785 transitions. [2021-08-21 12:28:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:28:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:07,968 INFO L225 Difference]: With dead ends: 651 [2021-08-21 12:28:07,968 INFO L226 Difference]: Without dead ends: 567 [2021-08-21 12:28:07,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:28:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-08-21 12:28:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 248. [2021-08-21 12:28:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.9635627530364372) internal successors, (732), 247 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 732 transitions. [2021-08-21 12:28:07,975 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 732 transitions. Word has length 18 [2021-08-21 12:28:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:07,975 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 732 transitions. [2021-08-21 12:28:07,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 732 transitions. [2021-08-21 12:28:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:07,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:07,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:07,994 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 12:28:08,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 12:28:08,192 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash 267033866, now seen corresponding path program 4 times [2021-08-21 12:28:08,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:08,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279520678] [2021-08-21 12:28:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:08,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:08,291 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 12:28:08,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:08,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279520678] [2021-08-21 12:28:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279520678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:08,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071515173] [2021-08-21 12:28:08,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:08,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:08,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:08,292 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 12:28:08,293 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 12:28:08,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:08,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:08,580 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 12:28:08,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071515173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:08,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:08,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:28:08,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933093436] [2021-08-21 12:28:08,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:28:08,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:08,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:28:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:08,581 INFO L87 Difference]: Start difference. First operand 248 states and 732 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:08,781 INFO L93 Difference]: Finished difference Result 470 states and 1309 transitions. [2021-08-21 12:28:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:08,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:08,782 INFO L225 Difference]: With dead ends: 470 [2021-08-21 12:28:08,782 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 12:28:08,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:28:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 12:28:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 251. [2021-08-21 12:28:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.948) internal successors, (737), 250 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 737 transitions. [2021-08-21 12:28:08,786 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 737 transitions. Word has length 18 [2021-08-21 12:28:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:08,786 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 737 transitions. [2021-08-21 12:28:08,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 737 transitions. [2021-08-21 12:28:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:08,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:08,787 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:08,805 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 12:28:09,003 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,SelfDestructingSolverStorable126 [2021-08-21 12:28:09,003 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash -624176268, now seen corresponding path program 5 times [2021-08-21 12:28:09,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:09,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030808699] [2021-08-21 12:28:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:09,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:09,113 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 12:28:09,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030808699] [2021-08-21 12:28:09,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030808699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:09,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812522137] [2021-08-21 12:28:09,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:09,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:09,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:09,114 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 12:28:09,115 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 12:28:09,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:09,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:09,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812522137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:09,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:09,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:28:09,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953324899] [2021-08-21 12:28:09,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:28:09,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:28:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:09,429 INFO L87 Difference]: Start difference. First operand 251 states and 737 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:09,651 INFO L93 Difference]: Finished difference Result 441 states and 1216 transitions. [2021-08-21 12:28:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:09,652 INFO L225 Difference]: With dead ends: 441 [2021-08-21 12:28:09,652 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 12:28:09,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:28:09,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 12:28:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 254. [2021-08-21 12:28:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-08-21 12:28:09,656 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 18 [2021-08-21 12:28:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:09,656 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-08-21 12:28:09,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-08-21 12:28:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:09,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:09,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:09,673 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 12:28:09,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:09,873 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash -30124914, now seen corresponding path program 6 times [2021-08-21 12:28:09,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:09,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222709203] [2021-08-21 12:28:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:09,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:09,950 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 12:28:09,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:09,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222709203] [2021-08-21 12:28:09,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222709203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:09,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978649694] [2021-08-21 12:28:09,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:09,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:09,973 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 12:28:09,974 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 12:28:10,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:28:10,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:10,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:10,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:10,254 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 12:28:10,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978649694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:10,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:10,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:28:10,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235170739] [2021-08-21 12:28:10,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:28:10,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:10,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:28:10,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:10,255 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:10,753 INFO L93 Difference]: Finished difference Result 545 states and 1509 transitions. [2021-08-21 12:28:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:28:10,753 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:10,754 INFO L225 Difference]: With dead ends: 545 [2021-08-21 12:28:10,754 INFO L226 Difference]: Without dead ends: 456 [2021-08-21 12:28:10,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:28:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-21 12:28:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 248. [2021-08-21 12:28:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0040485829959516) internal successors, (742), 247 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 742 transitions. [2021-08-21 12:28:10,759 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 742 transitions. Word has length 18 [2021-08-21 12:28:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:10,759 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 742 transitions. [2021-08-21 12:28:10,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 742 transitions. [2021-08-21 12:28:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:10,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:10,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:10,794 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 12:28:10,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:10,969 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1478642185, now seen corresponding path program 1 times [2021-08-21 12:28:10,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:10,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228640471] [2021-08-21 12:28:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:10,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:11,039 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 12:28:11,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:11,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228640471] [2021-08-21 12:28:11,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228640471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:11,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343257724] [2021-08-21 12:28:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:11,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:11,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:11,040 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 12:28:11,041 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 12:28:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:11,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:11,369 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 12:28:11,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343257724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:11,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:11,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:11,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147492107] [2021-08-21 12:28:11,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:11,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:11,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:11,370 INFO L87 Difference]: Start difference. First operand 248 states and 742 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:11,496 INFO L93 Difference]: Finished difference Result 454 states and 1329 transitions. [2021-08-21 12:28:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:11,497 INFO L225 Difference]: With dead ends: 454 [2021-08-21 12:28:11,497 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:28:11,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:28:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 261. [2021-08-21 12:28:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.042307692307692) internal successors, (791), 260 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 791 transitions. [2021-08-21 12:28:11,501 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 791 transitions. Word has length 18 [2021-08-21 12:28:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:11,501 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 791 transitions. [2021-08-21 12:28:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 791 transitions. [2021-08-21 12:28:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:11,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:11,502 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:11,521 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 12:28:11,718 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,SelfDestructingSolverStorable129 [2021-08-21 12:28:11,719 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash -711139859, now seen corresponding path program 2 times [2021-08-21 12:28:11,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:11,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303629536] [2021-08-21 12:28:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:11,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:11,745 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 12:28:11,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:11,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303629536] [2021-08-21 12:28:11,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303629536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:11,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214831184] [2021-08-21 12:28:11,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:11,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:11,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:11,760 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 12:28:11,785 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 12:28:11,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:11,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:12,050 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 12:28:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214831184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:12,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:12,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 12:28:12,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799048202] [2021-08-21 12:28:12,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:28:12,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:28:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:28:12,051 INFO L87 Difference]: Start difference. First operand 261 states and 791 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 12:28:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:12,098 INFO L93 Difference]: Finished difference Result 437 states and 1302 transitions. [2021-08-21 12:28:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:12,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 18 [2021-08-21 12:28:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:12,099 INFO L225 Difference]: With dead ends: 437 [2021-08-21 12:28:12,099 INFO L226 Difference]: Without dead ends: 393 [2021-08-21 12:28:12,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:28:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-08-21 12:28:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 277. [2021-08-21 12:28:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0543478260869565) internal successors, (843), 276 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-08-21 12:28:12,103 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-08-21 12:28:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:12,103 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-08-21 12:28:12,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 12:28:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-08-21 12:28:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:12,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:12,103 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:12,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-21 12:28:12,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:12,322 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1138956040, now seen corresponding path program 7 times [2021-08-21 12:28:12,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:12,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180492283] [2021-08-21 12:28:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:12,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:12,403 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 12:28:12,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:12,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180492283] [2021-08-21 12:28:12,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180492283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:12,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847039595] [2021-08-21 12:28:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:28:12,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:12,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:12,429 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 12:28:12,430 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 12:28:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:12,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:12,776 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 12:28:12,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847039595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:12,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:12,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 12:28:12,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92606917] [2021-08-21 12:28:12,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:28:12,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:28:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:12,777 INFO L87 Difference]: Start difference. First operand 277 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:12,994 INFO L93 Difference]: Finished difference Result 557 states and 1551 transitions. [2021-08-21 12:28:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:12,995 INFO L225 Difference]: With dead ends: 557 [2021-08-21 12:28:12,995 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 12:28:12,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:28:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 12:28:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 284. [2021-08-21 12:28:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.060070671378092) internal successors, (866), 283 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 866 transitions. [2021-08-21 12:28:13,000 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 866 transitions. Word has length 18 [2021-08-21 12:28:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:13,000 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 866 transitions. [2021-08-21 12:28:13,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 866 transitions. [2021-08-21 12:28:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:13,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:13,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:13,020 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 12:28:13,217 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,SelfDestructingSolverStorable131 [2021-08-21 12:28:13,217 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:13,218 INFO L82 PathProgramCache]: Analyzing trace with hash -122015580, now seen corresponding path program 2 times [2021-08-21 12:28:13,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:13,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667131858] [2021-08-21 12:28:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:13,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:13,271 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 12:28:13,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:13,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667131858] [2021-08-21 12:28:13,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667131858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:13,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930388421] [2021-08-21 12:28:13,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:13,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:13,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:13,272 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 12:28:13,273 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 12:28:13,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:13,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:13,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:13,626 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 12:28:13,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930388421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:13,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:13,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:28:13,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371315294] [2021-08-21 12:28:13,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:28:13,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:28:13,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:28:13,627 INFO L87 Difference]: Start difference. First operand 284 states and 866 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12:28:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:13,722 INFO L93 Difference]: Finished difference Result 566 states and 1626 transitions. [2021-08-21 12:28:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:13,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:13,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:13,723 INFO L225 Difference]: With dead ends: 566 [2021-08-21 12:28:13,723 INFO L226 Difference]: Without dead ends: 505 [2021-08-21 12:28:13,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-21 12:28:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-08-21 12:28:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.120401337792642) internal successors, (933), 299 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 933 transitions. [2021-08-21 12:28:13,728 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 933 transitions. Word has length 18 [2021-08-21 12:28:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:13,728 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 933 transitions. [2021-08-21 12:28:13,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12:28:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 933 transitions. [2021-08-21 12:28:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:13,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:13,729 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:13,747 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 12:28:13,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:13,945 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:13,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:13,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1323652908, now seen corresponding path program 8 times [2021-08-21 12:28:13,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:13,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700435710] [2021-08-21 12:28:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:13,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:13,990 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 12:28:13,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:13,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700435710] [2021-08-21 12:28:13,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700435710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:13,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19237416] [2021-08-21 12:28:13,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:13,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:13,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:13,991 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 12:28:13,991 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 12:28:14,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:14,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:14,268 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 12:28:14,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19237416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:14,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:14,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 12:28:14,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480641735] [2021-08-21 12:28:14,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:14,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:14,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:14,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:14,268 INFO L87 Difference]: Start difference. First operand 300 states and 933 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:14,371 INFO L93 Difference]: Finished difference Result 439 states and 1262 transitions. [2021-08-21 12:28:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:14,372 INFO L225 Difference]: With dead ends: 439 [2021-08-21 12:28:14,372 INFO L226 Difference]: Without dead ends: 381 [2021-08-21 12:28:14,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-21 12:28:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 296. [2021-08-21 12:28:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.0406779661016947) internal successors, (897), 295 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 897 transitions. [2021-08-21 12:28:14,376 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 897 transitions. Word has length 18 [2021-08-21 12:28:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:14,376 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 897 transitions. [2021-08-21 12:28:14,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 897 transitions. [2021-08-21 12:28:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:14,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:14,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:14,392 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 12:28:14,592 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,SelfDestructingSolverStorable133 [2021-08-21 12:28:14,592 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash -643487665, now seen corresponding path program 3 times [2021-08-21 12:28:14,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:14,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673772552] [2021-08-21 12:28:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:14,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:14,659 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 12:28:14,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:14,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673772552] [2021-08-21 12:28:14,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673772552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:14,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878260452] [2021-08-21 12:28:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:14,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:14,660 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 12:28:14,661 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 12:28:14,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:28:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:14,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:15,051 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 12:28:15,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878260452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:15,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:15,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:15,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812049190] [2021-08-21 12:28:15,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:15,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:15,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:15,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:15,052 INFO L87 Difference]: Start difference. First operand 296 states and 897 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:15,290 INFO L93 Difference]: Finished difference Result 438 states and 1244 transitions. [2021-08-21 12:28:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:15,291 INFO L225 Difference]: With dead ends: 438 [2021-08-21 12:28:15,291 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 12:28:15,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 12:28:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 308. [2021-08-21 12:28:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-08-21 12:28:15,295 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 18 [2021-08-21 12:28:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:15,295 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-08-21 12:28:15,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-08-21 12:28:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:15,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:15,295 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:15,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:15,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:28:15,512 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1235680749, now seen corresponding path program 4 times [2021-08-21 12:28:15,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:15,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651073203] [2021-08-21 12:28:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:15,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:15,612 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 12:28:15,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:15,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651073203] [2021-08-21 12:28:15,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651073203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:15,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428545672] [2021-08-21 12:28:15,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:15,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:15,613 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 12:28:15,614 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 12:28:15,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:15,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:15,988 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 12:28:15,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428545672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:15,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:15,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:15,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762269072] [2021-08-21 12:28:15,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:15,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:15,989 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:16,174 INFO L93 Difference]: Finished difference Result 413 states and 1192 transitions. [2021-08-21 12:28:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:16,175 INFO L225 Difference]: With dead ends: 413 [2021-08-21 12:28:16,175 INFO L226 Difference]: Without dead ends: 379 [2021-08-21 12:28:16,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:28:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-21 12:28:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 296. [2021-08-21 12:28:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.0338983050847457) internal successors, (895), 295 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 895 transitions. [2021-08-21 12:28:16,179 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 895 transitions. Word has length 18 [2021-08-21 12:28:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:16,179 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 895 transitions. [2021-08-21 12:28:16,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 895 transitions. [2021-08-21 12:28:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:16,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:16,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:16,196 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 12:28:16,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:16,396 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:16,396 INFO L82 PathProgramCache]: Analyzing trace with hash -34208214, now seen corresponding path program 3 times [2021-08-21 12:28:16,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:16,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801382893] [2021-08-21 12:28:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:16,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:16,440 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 12:28:16,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:16,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801382893] [2021-08-21 12:28:16,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801382893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:16,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314973072] [2021-08-21 12:28:16,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:16,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:16,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:16,458 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 12:28:16,459 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 12:28:16,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:28:16,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:16,856 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 12:28:16,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314973072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:16,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:16,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-21 12:28:16,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450514017] [2021-08-21 12:28:16,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:28:16,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:28:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:16,857 INFO L87 Difference]: Start difference. First operand 296 states and 895 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:17,021 INFO L93 Difference]: Finished difference Result 481 states and 1359 transitions. [2021-08-21 12:28:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:28:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:17,022 INFO L225 Difference]: With dead ends: 481 [2021-08-21 12:28:17,022 INFO L226 Difference]: Without dead ends: 403 [2021-08-21 12:28:17,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:28:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-21 12:28:17,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 294. [2021-08-21 12:28:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.0204778156996586) internal successors, (885), 293 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 885 transitions. [2021-08-21 12:28:17,026 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 885 transitions. Word has length 18 [2021-08-21 12:28:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:17,026 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 885 transitions. [2021-08-21 12:28:17,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 885 transitions. [2021-08-21 12:28:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:17,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:17,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:17,044 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 12:28:17,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:28:17,244 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1601323667, now seen corresponding path program 5 times [2021-08-21 12:28:17,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:17,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20494176] [2021-08-21 12:28:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:17,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:17,292 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 12:28:17,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:17,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20494176] [2021-08-21 12:28:17,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20494176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:17,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586370167] [2021-08-21 12:28:17,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:17,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:17,309 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 12:28:17,332 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 12:28:17,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:17,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:17,702 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 12:28:17,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586370167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:17,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:17,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:28:17,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800188354] [2021-08-21 12:28:17,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:28:17,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:28:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:28:17,703 INFO L87 Difference]: Start difference. First operand 294 states and 885 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 12:28:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:17,796 INFO L93 Difference]: Finished difference Result 433 states and 1284 transitions. [2021-08-21 12:28:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:17,797 INFO L225 Difference]: With dead ends: 433 [2021-08-21 12:28:17,797 INFO L226 Difference]: Without dead ends: 390 [2021-08-21 12:28:17,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-21 12:28:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 320. [2021-08-21 12:28:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.0564263322884013) internal successors, (975), 319 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 975 transitions. [2021-08-21 12:28:17,802 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 975 transitions. Word has length 18 [2021-08-21 12:28:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:17,802 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 975 transitions. [2021-08-21 12:28:17,802 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 12:28:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 975 transitions. [2021-08-21 12:28:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:17,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:17,802 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:17,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 12:28:18,027 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,SelfDestructingSolverStorable137 [2021-08-21 12:28:18,027 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:18,027 INFO L82 PathProgramCache]: Analyzing trace with hash 531772977, now seen corresponding path program 6 times [2021-08-21 12:28:18,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:18,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047363131] [2021-08-21 12:28:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:18,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:18,065 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 12:28:18,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:18,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047363131] [2021-08-21 12:28:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047363131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:18,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637526902] [2021-08-21 12:28:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:18,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:18,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:18,067 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 12:28:18,067 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 12:28:18,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:28:18,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:18,505 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 12:28:18,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637526902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:18,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:18,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-08-21 12:28:18,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188459330] [2021-08-21 12:28:18,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:28:18,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:28:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:18,506 INFO L87 Difference]: Start difference. First operand 320 states and 975 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 12:28:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:18,779 INFO L93 Difference]: Finished difference Result 618 states and 1767 transitions. [2021-08-21 12:28:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:28:18,779 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 18 [2021-08-21 12:28:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:18,780 INFO L225 Difference]: With dead ends: 618 [2021-08-21 12:28:18,780 INFO L226 Difference]: Without dead ends: 494 [2021-08-21 12:28:18,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:28:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-21 12:28:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 307. [2021-08-21 12:28:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0326797385620914) internal successors, (928), 306 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 928 transitions. [2021-08-21 12:28:18,784 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 928 transitions. Word has length 18 [2021-08-21 12:28:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:18,784 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 928 transitions. [2021-08-21 12:28:18,784 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 12:28:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 928 transitions. [2021-08-21 12:28:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:18,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:18,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:18,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 12:28:18,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:18,993 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:18,993 INFO L82 PathProgramCache]: Analyzing trace with hash -90982872, now seen corresponding path program 9 times [2021-08-21 12:28:18,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:18,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179814353] [2021-08-21 12:28:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:18,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:19,057 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 12:28:19,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:19,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179814353] [2021-08-21 12:28:19,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179814353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:19,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284919826] [2021-08-21 12:28:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:19,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:19,059 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 12:28:19,060 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 12:28:19,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:28:19,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:19,461 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 12:28:19,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284919826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:19,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:19,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-21 12:28:19,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725487995] [2021-08-21 12:28:19,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:28:19,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:28:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:19,462 INFO L87 Difference]: Start difference. First operand 307 states and 928 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:19,801 INFO L93 Difference]: Finished difference Result 718 states and 2053 transitions. [2021-08-21 12:28:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:28:19,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:19,802 INFO L225 Difference]: With dead ends: 718 [2021-08-21 12:28:19,802 INFO L226 Difference]: Without dead ends: 592 [2021-08-21 12:28:19,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:28:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-21 12:28:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-08-21 12:28:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0226537216828477) internal successors, (934), 309 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 934 transitions. [2021-08-21 12:28:19,807 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 934 transitions. Word has length 18 [2021-08-21 12:28:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:19,807 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 934 transitions. [2021-08-21 12:28:19,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 934 transitions. [2021-08-21 12:28:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:19,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:19,808 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:19,827 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 12:28:20,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:20,025 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:20,025 INFO L82 PathProgramCache]: Analyzing trace with hash 724975432, now seen corresponding path program 10 times [2021-08-21 12:28:20,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:20,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640457720] [2021-08-21 12:28:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:20,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:20,154 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 12:28:20,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:20,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640457720] [2021-08-21 12:28:20,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640457720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:20,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318047437] [2021-08-21 12:28:20,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:20,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:20,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:20,169 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 12:28:20,212 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 12:28:20,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:20,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:20,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:20,712 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 12:28:20,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318047437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:20,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:20,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 12:28:20,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890417401] [2021-08-21 12:28:20,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:28:20,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:20,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:28:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:28:20,713 INFO L87 Difference]: Start difference. First operand 310 states and 934 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:20,910 INFO L93 Difference]: Finished difference Result 549 states and 1571 transitions. [2021-08-21 12:28:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:20,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:20,911 INFO L225 Difference]: With dead ends: 549 [2021-08-21 12:28:20,911 INFO L226 Difference]: Without dead ends: 512 [2021-08-21 12:28:20,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-21 12:28:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 310. [2021-08-21 12:28:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0194174757281553) internal successors, (933), 309 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 933 transitions. [2021-08-21 12:28:20,916 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 933 transitions. Word has length 18 [2021-08-21 12:28:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:20,916 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 933 transitions. [2021-08-21 12:28:20,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 933 transitions. [2021-08-21 12:28:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:20,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:20,917 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:20,936 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 12:28:21,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:21,117 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash 632739358, now seen corresponding path program 11 times [2021-08-21 12:28:21,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:21,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535292101] [2021-08-21 12:28:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:21,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:21,183 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 12:28:21,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:21,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535292101] [2021-08-21 12:28:21,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535292101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:21,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101161862] [2021-08-21 12:28:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:21,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:21,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:21,184 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 12:28:21,185 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 12:28:21,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:21,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:21,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:21,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:21,698 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 12:28:21,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101161862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:21,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:21,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:21,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065140045] [2021-08-21 12:28:21,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:21,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:21,699 INFO L87 Difference]: Start difference. First operand 310 states and 933 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:21,854 INFO L93 Difference]: Finished difference Result 552 states and 1552 transitions. [2021-08-21 12:28:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:21,855 INFO L225 Difference]: With dead ends: 552 [2021-08-21 12:28:21,856 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 12:28:21,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:28:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 12:28:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 313. [2021-08-21 12:28:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0288461538461537) internal successors, (945), 312 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 945 transitions. [2021-08-21 12:28:21,862 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 945 transitions. Word has length 18 [2021-08-21 12:28:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:21,862 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 945 transitions. [2021-08-21 12:28:21,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 945 transitions. [2021-08-21 12:28:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:21,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:21,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:21,880 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 12:28:22,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:22,080 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:22,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1677277118, now seen corresponding path program 12 times [2021-08-21 12:28:22,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:22,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931329620] [2021-08-21 12:28:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:22,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:22,111 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 12:28:22,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:22,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931329620] [2021-08-21 12:28:22,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931329620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:22,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27602395] [2021-08-21 12:28:22,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:22,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:22,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:22,112 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 12:28:22,114 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 12:28:22,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:28:22,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:22,543 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 12:28:22,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27602395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:22,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:22,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 12:28:22,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866786659] [2021-08-21 12:28:22,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:28:22,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:22,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:28:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:28:22,544 INFO L87 Difference]: Start difference. First operand 313 states and 945 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 12:28:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:22,590 INFO L93 Difference]: Finished difference Result 451 states and 1311 transitions. [2021-08-21 12:28:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:22,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:22,591 INFO L225 Difference]: With dead ends: 451 [2021-08-21 12:28:22,591 INFO L226 Difference]: Without dead ends: 402 [2021-08-21 12:28:22,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:28:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-21 12:28:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 275. [2021-08-21 12:28:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.9708029197080292) internal successors, (814), 274 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 814 transitions. [2021-08-21 12:28:22,594 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 814 transitions. Word has length 18 [2021-08-21 12:28:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:22,594 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 814 transitions. [2021-08-21 12:28:22,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 12:28:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 814 transitions. [2021-08-21 12:28:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:22,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:22,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:22,614 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 12:28:22,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:22,812 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1009718582, now seen corresponding path program 4 times [2021-08-21 12:28:22,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:22,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870027978] [2021-08-21 12:28:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:22,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:22,853 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 12:28:22,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:22,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870027978] [2021-08-21 12:28:22,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870027978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:22,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340695996] [2021-08-21 12:28:22,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:22,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:22,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:22,854 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 12:28:22,855 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 12:28:23,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:23,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:23,265 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 12:28:23,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340695996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:23,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:23,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:28:23,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944892403] [2021-08-21 12:28:23,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:28:23,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:28:23,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:28:23,266 INFO L87 Difference]: Start difference. First operand 275 states and 814 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12:28:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:23,367 INFO L93 Difference]: Finished difference Result 382 states and 1100 transitions. [2021-08-21 12:28:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:23,368 INFO L225 Difference]: With dead ends: 382 [2021-08-21 12:28:23,368 INFO L226 Difference]: Without dead ends: 321 [2021-08-21 12:28:23,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-21 12:28:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 285. [2021-08-21 12:28:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.943661971830986) internal successors, (836), 284 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 836 transitions. [2021-08-21 12:28:23,388 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 836 transitions. Word has length 18 [2021-08-21 12:28:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 836 transitions. [2021-08-21 12:28:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12:28:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 836 transitions. [2021-08-21 12:28:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:23,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:23,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:23,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:23,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:23,589 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash -921911216, now seen corresponding path program 5 times [2021-08-21 12:28:23,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:23,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355054110] [2021-08-21 12:28:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:23,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:23,643 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 12:28:23,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:23,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355054110] [2021-08-21 12:28:23,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355054110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:23,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605473719] [2021-08-21 12:28:23,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:23,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:23,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:23,644 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 12:28:23,645 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 12:28:24,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:24,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:24,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:24,130 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 12:28:24,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605473719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:24,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:24,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:28:24,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002410884] [2021-08-21 12:28:24,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:28:24,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:28:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:28:24,131 INFO L87 Difference]: Start difference. First operand 285 states and 836 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12:28:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:24,197 INFO L93 Difference]: Finished difference Result 392 states and 1114 transitions. [2021-08-21 12:28:24,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:24,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:24,197 INFO L225 Difference]: With dead ends: 392 [2021-08-21 12:28:24,197 INFO L226 Difference]: Without dead ends: 337 [2021-08-21 12:28:24,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-21 12:28:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 274. [2021-08-21 12:28:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.93040293040293) internal successors, (800), 273 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 800 transitions. [2021-08-21 12:28:24,201 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 800 transitions. Word has length 18 [2021-08-21 12:28:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:24,201 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 800 transitions. [2021-08-21 12:28:24,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 12:28:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 800 transitions. [2021-08-21 12:28:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:24,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:24,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:24,220 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 12:28:24,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:24,419 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2033870275, now seen corresponding path program 7 times [2021-08-21 12:28:24,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:24,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289616804] [2021-08-21 12:28:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:24,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:24,528 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 12:28:24,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:24,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289616804] [2021-08-21 12:28:24,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289616804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:24,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844320304] [2021-08-21 12:28:24,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:28:24,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:24,545 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 12:28:24,603 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 12:28:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:24,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:25,106 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 12:28:25,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844320304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:25,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:25,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:25,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573770546] [2021-08-21 12:28:25,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:25,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:25,107 INFO L87 Difference]: Start difference. First operand 274 states and 800 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:25,282 INFO L93 Difference]: Finished difference Result 374 states and 1011 transitions. [2021-08-21 12:28:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:25,282 INFO L225 Difference]: With dead ends: 374 [2021-08-21 12:28:25,282 INFO L226 Difference]: Without dead ends: 347 [2021-08-21 12:28:25,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-08-21 12:28:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 276. [2021-08-21 12:28:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2021-08-21 12:28:25,286 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 18 [2021-08-21 12:28:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:25,286 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2021-08-21 12:28:25,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2021-08-21 12:28:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:25,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:25,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:25,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 12:28:25,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 12:28:25,503 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash 824244543, now seen corresponding path program 8 times [2021-08-21 12:28:25,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:25,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575366756] [2021-08-21 12:28:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:25,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:25,592 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 12:28:25,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:25,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575366756] [2021-08-21 12:28:25,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575366756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:25,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934231167] [2021-08-21 12:28:25,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:25,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:25,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:25,609 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 12:28:25,664 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 12:28:26,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:26,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:26,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:26,174 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 12:28:26,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934231167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:26,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:26,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:26,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964118791] [2021-08-21 12:28:26,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:26,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:26,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:26,175 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:26,375 INFO L93 Difference]: Finished difference Result 366 states and 993 transitions. [2021-08-21 12:28:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:26,376 INFO L225 Difference]: With dead ends: 366 [2021-08-21 12:28:26,376 INFO L226 Difference]: Without dead ends: 343 [2021-08-21 12:28:26,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-08-21 12:28:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 280. [2021-08-21 12:28:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.913978494623656) internal successors, (813), 279 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 813 transitions. [2021-08-21 12:28:26,379 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 813 transitions. Word has length 18 [2021-08-21 12:28:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:26,379 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 813 transitions. [2021-08-21 12:28:26,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 813 transitions. [2021-08-21 12:28:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:26,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:26,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:26,399 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 12:28:26,592 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,SelfDestructingSolverStorable146 [2021-08-21 12:28:26,593 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash 232051459, now seen corresponding path program 9 times [2021-08-21 12:28:26,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:26,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123807452] [2021-08-21 12:28:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:26,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:26,684 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 12:28:26,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:26,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123807452] [2021-08-21 12:28:26,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123807452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:26,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876372826] [2021-08-21 12:28:26,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:26,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:26,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:26,685 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 12:28:26,686 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 12:28:27,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:28:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:27,201 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 12:28:27,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876372826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:27,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:27,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 12:28:27,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274255711] [2021-08-21 12:28:27,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:28:27,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:28:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:28:27,202 INFO L87 Difference]: Start difference. First operand 280 states and 813 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:27,346 INFO L93 Difference]: Finished difference Result 341 states and 941 transitions. [2021-08-21 12:28:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:28:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:27,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:27,348 INFO L225 Difference]: With dead ends: 341 [2021-08-21 12:28:27,348 INFO L226 Difference]: Without dead ends: 305 [2021-08-21 12:28:27,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:28:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-08-21 12:28:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 270. [2021-08-21 12:28:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.9442379182156135) internal successors, (792), 269 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 792 transitions. [2021-08-21 12:28:27,351 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 792 transitions. Word has length 18 [2021-08-21 12:28:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:27,352 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 792 transitions. [2021-08-21 12:28:27,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 792 transitions. [2021-08-21 12:28:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:27,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:27,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:27,371 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 12:28:27,569 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,SelfDestructingSolverStorable147 [2021-08-21 12:28:27,569 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1675811136, now seen corresponding path program 6 times [2021-08-21 12:28:27,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:27,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869366777] [2021-08-21 12:28:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:27,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:27,630 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 12:28:27,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:27,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869366777] [2021-08-21 12:28:27,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869366777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:27,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195117763] [2021-08-21 12:28:27,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:27,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:27,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:27,631 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 12:28:27,632 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 12:28:28,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:28:28,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:28,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:28,171 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 12:28:28,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195117763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:28,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:28,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-08-21 12:28:28,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800267362] [2021-08-21 12:28:28,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:28:28,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:28:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:28,172 INFO L87 Difference]: Start difference. First operand 270 states and 792 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:28,304 INFO L93 Difference]: Finished difference Result 382 states and 1064 transitions. [2021-08-21 12:28:28,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:28:28,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:28,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:28,305 INFO L225 Difference]: With dead ends: 382 [2021-08-21 12:28:28,305 INFO L226 Difference]: Without dead ends: 298 [2021-08-21 12:28:28,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:28:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-21 12:28:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 221. [2021-08-21 12:28:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9545454545454546) internal successors, (650), 220 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 650 transitions. [2021-08-21 12:28:28,308 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 650 transitions. Word has length 18 [2021-08-21 12:28:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:28,308 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 650 transitions. [2021-08-21 12:28:28,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 650 transitions. [2021-08-21 12:28:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:28,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:28,308 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:28,328 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 12:28:28,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:28,526 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1801424317, now seen corresponding path program 10 times [2021-08-21 12:28:28,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:28,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21083836] [2021-08-21 12:28:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:28,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:28,577 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 12:28:28,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:28,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21083836] [2021-08-21 12:28:28,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21083836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:28,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410071189] [2021-08-21 12:28:28,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:28,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:28,578 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 12:28:28,624 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 12:28:28,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:28,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:29,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410071189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:29,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:29,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:28:29,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700197093] [2021-08-21 12:28:29,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:28:29,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:28:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:28:29,093 INFO L87 Difference]: Start difference. First operand 221 states and 650 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 12:28:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:29,221 INFO L93 Difference]: Finished difference Result 324 states and 925 transitions. [2021-08-21 12:28:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:29,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:29,221 INFO L225 Difference]: With dead ends: 324 [2021-08-21 12:28:29,222 INFO L226 Difference]: Without dead ends: 273 [2021-08-21 12:28:29,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-21 12:28:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 222. [2021-08-21 12:28:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9411764705882355) internal successors, (650), 221 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 650 transitions. [2021-08-21 12:28:29,224 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 650 transitions. Word has length 18 [2021-08-21 12:28:29,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:29,224 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 650 transitions. [2021-08-21 12:28:29,224 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 12:28:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 650 transitions. [2021-08-21 12:28:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:29,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:29,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:29,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:29,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:29,441 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -315615553, now seen corresponding path program 11 times [2021-08-21 12:28:29,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:29,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751531370] [2021-08-21 12:28:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:29,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:29,500 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 12:28:29,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:29,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751531370] [2021-08-21 12:28:29,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751531370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:29,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028829628] [2021-08-21 12:28:29,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:29,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:29,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:29,501 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 12:28:29,502 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 12:28:29,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:29,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:29,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:28:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:30,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028829628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:30,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:30,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 12:28:30,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406289276] [2021-08-21 12:28:30,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:28:30,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:28:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:28:30,035 INFO L87 Difference]: Start difference. First operand 222 states and 650 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 12:28:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:30,136 INFO L93 Difference]: Finished difference Result 308 states and 878 transitions. [2021-08-21 12:28:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:28:30,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:28:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:30,137 INFO L225 Difference]: With dead ends: 308 [2021-08-21 12:28:30,137 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 12:28:30,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:28:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 12:28:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 232. [2021-08-21 12:28:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.935064935064935) internal successors, (678), 231 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 678 transitions. [2021-08-21 12:28:30,140 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 678 transitions. Word has length 18 [2021-08-21 12:28:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:30,140 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 678 transitions. [2021-08-21 12:28:30,140 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 12:28:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 678 transitions. [2021-08-21 12:28:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:28:30,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:30,140 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:30,157 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 12:28:30,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:30,353 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1817481091, now seen corresponding path program 12 times [2021-08-21 12:28:30,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:30,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165342169] [2021-08-21 12:28:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:30,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:30,400 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 12:28:30,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:30,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165342169] [2021-08-21 12:28:30,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165342169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:30,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666462769] [2021-08-21 12:28:30,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:28:30,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:30,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:30,403 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 12:28:30,403 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 12:28:30,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:28:30,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:28:30,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:31,020 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 12:28:31,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666462769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:31,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:31,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-21 12:28:31,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409787105] [2021-08-21 12:28:31,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:28:31,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:28:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:28:31,021 INFO L87 Difference]: Start difference. First operand 232 states and 678 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 12:28:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:31,308 INFO L93 Difference]: Finished difference Result 333 states and 922 transitions. [2021-08-21 12:28:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:28:31,308 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 18 [2021-08-21 12:28:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:31,309 INFO L225 Difference]: With dead ends: 333 [2021-08-21 12:28:31,309 INFO L226 Difference]: Without dead ends: 220 [2021-08-21 12:28:31,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 231.4ms TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:28:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-21 12:28:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 189. [2021-08-21 12:28:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-21 12:28:31,311 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 18 [2021-08-21 12:28:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:31,311 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-21 12:28:31,311 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 12:28:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-21 12:28:31,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:28:31,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:31,312 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:31,329 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 12:28:31,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:31,528 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1960611379, now seen corresponding path program 1 times [2021-08-21 12:28:31,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:31,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93489947] [2021-08-21 12:28:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:31,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:31,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:31,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93489947] [2021-08-21 12:28:31,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93489947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:31,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705802412] [2021-08-21 12:28:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:31,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:31,814 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 12:28:31,814 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 12:28:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:28:32,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:33,065 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:33,066 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 109 [2021-08-21 12:28:34,587 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:34,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 141 [2021-08-21 12:28:34,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 116 [2021-08-21 12:28:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:35,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705802412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:35,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:35,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:28:35,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881312742] [2021-08-21 12:28:35,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:28:35,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:28:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:28:35,201 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:36,966 INFO L93 Difference]: Finished difference Result 442 states and 1213 transitions. [2021-08-21 12:28:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:28:36,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:28:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:36,968 INFO L225 Difference]: With dead ends: 442 [2021-08-21 12:28:36,968 INFO L226 Difference]: Without dead ends: 380 [2021-08-21 12:28:36,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1805.9ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:28:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-08-21 12:28:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 209. [2021-08-21 12:28:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.894230769230769) internal successors, (602), 208 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 602 transitions. [2021-08-21 12:28:36,971 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 602 transitions. Word has length 20 [2021-08-21 12:28:36,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:36,971 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 602 transitions. [2021-08-21 12:28:36,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 602 transitions. [2021-08-21 12:28:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:28:36,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:36,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:36,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:28:37,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:37,181 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -829366387, now seen corresponding path program 2 times [2021-08-21 12:28:37,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:37,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698158864] [2021-08-21 12:28:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:37,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:37,585 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 12:28:37,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:37,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698158864] [2021-08-21 12:28:37,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698158864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:37,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839517153] [2021-08-21 12:28:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:28:37,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:37,586 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 12:28:37,587 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 12:28:38,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:38,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:38,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:28:38,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:39,134 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:39,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 112 [2021-08-21 12:28:40,195 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:40,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 174 [2021-08-21 12:28:40,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2021-08-21 12:28:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:41,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839517153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:41,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:41,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:28:41,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740272600] [2021-08-21 12:28:41,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:28:41,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:28:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:28:41,511 INFO L87 Difference]: Start difference. First operand 209 states and 602 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:44,480 INFO L93 Difference]: Finished difference Result 498 states and 1357 transitions. [2021-08-21 12:28:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:28:44,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:28:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:44,481 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:28:44,481 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 12:28:44,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3002.7ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:28:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 12:28:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 215. [2021-08-21 12:28:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.9299065420560746) internal successors, (627), 214 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 627 transitions. [2021-08-21 12:28:44,484 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 627 transitions. Word has length 20 [2021-08-21 12:28:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:44,484 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 627 transitions. [2021-08-21 12:28:44,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 627 transitions. [2021-08-21 12:28:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:28:44,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:44,485 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:44,503 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 12:28:44,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:44,685 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:44,686 INFO L82 PathProgramCache]: Analyzing trace with hash -806769839, now seen corresponding path program 3 times [2021-08-21 12:28:44,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:44,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199213273] [2021-08-21 12:28:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:44,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:44,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:44,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199213273] [2021-08-21 12:28:44,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199213273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:44,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170999552] [2021-08-21 12:28:44,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:28:44,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:44,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:44,947 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 12:28:44,948 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 12:28:45,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:28:45,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:28:45,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:46,397 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 112 [2021-08-21 12:28:47,369 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:47,369 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 203 treesize of output 182 [2021-08-21 12:28:47,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 155 [2021-08-21 12:28:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:48,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170999552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:48,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:48,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:28:48,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553569238] [2021-08-21 12:28:48,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:28:48,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:28:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:28:48,797 INFO L87 Difference]: Start difference. First operand 215 states and 627 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:51,388 INFO L93 Difference]: Finished difference Result 500 states and 1346 transitions. [2021-08-21 12:28:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:28:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:28:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:51,390 INFO L225 Difference]: With dead ends: 500 [2021-08-21 12:28:51,390 INFO L226 Difference]: Without dead ends: 456 [2021-08-21 12:28:51,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2728.2ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:28:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-21 12:28:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 212. [2021-08-21 12:28:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.90521327014218) internal successors, (613), 211 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 613 transitions. [2021-08-21 12:28:51,393 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 613 transitions. Word has length 20 [2021-08-21 12:28:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:51,393 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 613 transitions. [2021-08-21 12:28:51,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 613 transitions. [2021-08-21 12:28:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:28:51,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:51,393 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:51,413 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 12:28:51,600 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,SelfDestructingSolverStorable154 [2021-08-21 12:28:51,601 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash -235315033, now seen corresponding path program 4 times [2021-08-21 12:28:51,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:51,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936361208] [2021-08-21 12:28:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:51,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:51,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:51,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936361208] [2021-08-21 12:28:51,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936361208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:51,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026954949] [2021-08-21 12:28:51,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:28:51,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:51,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:51,938 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 12:28:51,939 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 12:28:52,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:28:52,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:52,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:28:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:28:53,539 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:53,540 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 122 treesize of output 107 [2021-08-21 12:28:54,911 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:28:54,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 154 [2021-08-21 12:28:54,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 131 [2021-08-21 12:28:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:55,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026954949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:55,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:28:55,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:28:55,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152229935] [2021-08-21 12:28:55,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:28:55,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:28:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:28:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:28:55,676 INFO L87 Difference]: Start difference. First operand 212 states and 613 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:28:58,417 INFO L93 Difference]: Finished difference Result 552 states and 1497 transitions. [2021-08-21 12:28:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:28:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:28:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:28:58,419 INFO L225 Difference]: With dead ends: 552 [2021-08-21 12:28:58,419 INFO L226 Difference]: Without dead ends: 486 [2021-08-21 12:28:58,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2752.3ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:28:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-21 12:28:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 238. [2021-08-21 12:28:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.8565400843881856) internal successors, (677), 237 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 677 transitions. [2021-08-21 12:28:58,424 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 677 transitions. Word has length 20 [2021-08-21 12:28:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:28:58,424 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 677 transitions. [2021-08-21 12:28:58,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:28:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 677 transitions. [2021-08-21 12:28:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:28:58,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:28:58,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:28:58,469 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 12:28:58,632 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,SelfDestructingSolverStorable155 [2021-08-21 12:28:58,633 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:28:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:28:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash 113019597, now seen corresponding path program 5 times [2021-08-21 12:28:58,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:28:58,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915410149] [2021-08-21 12:28:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:28:58,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:28:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:28:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:28:58,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:28:58,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915410149] [2021-08-21 12:28:58,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915410149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:28:58,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224183448] [2021-08-21 12:28:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:28:58,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:28:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:28:58,967 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 12:28:58,968 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 12:28:59,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:28:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:28:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:28:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:00,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 76 [2021-08-21 12:29:00,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2021-08-21 12:29:00,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 101 [2021-08-21 12:29:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:01,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224183448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:01,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:01,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:29:01,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112998383] [2021-08-21 12:29:01,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:29:01,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:29:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:29:01,363 INFO L87 Difference]: Start difference. First operand 238 states and 677 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:03,014 INFO L93 Difference]: Finished difference Result 409 states and 1157 transitions. [2021-08-21 12:29:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:29:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:03,015 INFO L225 Difference]: With dead ends: 409 [2021-08-21 12:29:03,015 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 12:29:03,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1897.4ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:29:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 12:29:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 250. [2021-08-21 12:29:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.8473895582329316) internal successors, (709), 249 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 709 transitions. [2021-08-21 12:29:03,019 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 709 transitions. Word has length 20 [2021-08-21 12:29:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:03,019 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 709 transitions. [2021-08-21 12:29:03,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 709 transitions. [2021-08-21 12:29:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:03,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:03,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:03,039 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 12:29:03,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 12:29:03,220 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:03,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1881445559, now seen corresponding path program 6 times [2021-08-21 12:29:03,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:03,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034426183] [2021-08-21 12:29:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:03,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:03,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:03,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034426183] [2021-08-21 12:29:03,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034426183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:03,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687599065] [2021-08-21 12:29:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:29:03,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:03,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:03,477 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 12:29:03,478 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 12:29:04,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:29:04,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:29:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:05,190 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:05,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 89 [2021-08-21 12:29:05,638 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:05,638 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 161 treesize of output 146 [2021-08-21 12:29:05,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 125 [2021-08-21 12:29:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687599065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:06,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:06,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:29:06,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353553262] [2021-08-21 12:29:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:29:06,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:29:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:06,736 INFO L87 Difference]: Start difference. First operand 250 states and 709 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:10,146 INFO L93 Difference]: Finished difference Result 554 states and 1482 transitions. [2021-08-21 12:29:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:29:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:10,147 INFO L225 Difference]: With dead ends: 554 [2021-08-21 12:29:10,147 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 12:29:10,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3386.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:29:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 12:29:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 259. [2021-08-21 12:29:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.887596899224806) internal successors, (745), 258 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 745 transitions. [2021-08-21 12:29:10,151 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 745 transitions. Word has length 20 [2021-08-21 12:29:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:10,151 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 745 transitions. [2021-08-21 12:29:10,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 745 transitions. [2021-08-21 12:29:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:10,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:10,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:10,170 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 12:29:10,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 12:29:10,361 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 264725201, now seen corresponding path program 7 times [2021-08-21 12:29:10,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:10,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681233229] [2021-08-21 12:29:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:10,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:10,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:10,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681233229] [2021-08-21 12:29:10,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681233229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:10,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28079094] [2021-08-21 12:29:10,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:29:10,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:10,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:10,661 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 12:29:10,662 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 12:29:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:29:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:12,524 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:12,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 109 [2021-08-21 12:29:13,205 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:13,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 170 [2021-08-21 12:29:13,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 145 [2021-08-21 12:29:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:14,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28079094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:14,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:14,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:29:14,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672454804] [2021-08-21 12:29:14,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:29:14,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:29:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:14,409 INFO L87 Difference]: Start difference. First operand 259 states and 745 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:17,313 INFO L93 Difference]: Finished difference Result 546 states and 1497 transitions. [2021-08-21 12:29:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:29:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:17,314 INFO L225 Difference]: With dead ends: 546 [2021-08-21 12:29:17,314 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 12:29:17,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3005.9ms TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:29:17,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 12:29:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 265. [2021-08-21 12:29:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.9053030303030303) internal successors, (767), 264 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 767 transitions. [2021-08-21 12:29:17,318 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 767 transitions. Word has length 20 [2021-08-21 12:29:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:17,318 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 767 transitions. [2021-08-21 12:29:17,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 767 transitions. [2021-08-21 12:29:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:17,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:17,319 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:17,338 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 12:29:17,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:29:17,525 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1284001523, now seen corresponding path program 8 times [2021-08-21 12:29:17,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:17,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479293440] [2021-08-21 12:29:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:17,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:17,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:17,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479293440] [2021-08-21 12:29:17,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479293440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:17,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484174957] [2021-08-21 12:29:17,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:29:17,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:17,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:17,887 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 12:29:17,887 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 12:29:18,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:29:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:29:18,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:19,675 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:19,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 99 [2021-08-21 12:29:20,831 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:20,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 135 [2021-08-21 12:29:20,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2021-08-21 12:29:21,473 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 12:29:21,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484174957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:21,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:21,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:29:21,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176156849] [2021-08-21 12:29:21,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:29:21,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:29:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:21,474 INFO L87 Difference]: Start difference. First operand 265 states and 767 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:23,076 INFO L93 Difference]: Finished difference Result 498 states and 1404 transitions. [2021-08-21 12:29:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:29:23,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:23,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:23,077 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:29:23,077 INFO L226 Difference]: Without dead ends: 483 [2021-08-21 12:29:23,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1693.7ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:29:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-08-21 12:29:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 280. [2021-08-21 12:29:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.903225806451613) internal successors, (810), 279 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 810 transitions. [2021-08-21 12:29:23,081 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 810 transitions. Word has length 20 [2021-08-21 12:29:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:23,081 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 810 transitions. [2021-08-21 12:29:23,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 810 transitions. [2021-08-21 12:29:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:23,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:23,081 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:23,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 12:29:23,288 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,SelfDestructingSolverStorable159 [2021-08-21 12:29:23,289 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash 840627149, now seen corresponding path program 9 times [2021-08-21 12:29:23,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:23,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449453568] [2021-08-21 12:29:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:23,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:23,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449453568] [2021-08-21 12:29:23,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449453568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736523215] [2021-08-21 12:29:23,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:29:23,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:23,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:23,570 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 12:29:23,570 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 12:29:24,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:29:24,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:29:24,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:25,614 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 92 [2021-08-21 12:29:26,686 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:26,687 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 172 treesize of output 153 [2021-08-21 12:29:26,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 128 [2021-08-21 12:29:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:27,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736523215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:27,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:27,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:29:27,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448679105] [2021-08-21 12:29:27,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:29:27,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:29:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:27,919 INFO L87 Difference]: Start difference. First operand 280 states and 810 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:29,271 INFO L93 Difference]: Finished difference Result 528 states and 1465 transitions. [2021-08-21 12:29:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:29:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:29,272 INFO L225 Difference]: With dead ends: 528 [2021-08-21 12:29:29,272 INFO L226 Difference]: Without dead ends: 513 [2021-08-21 12:29:29,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1451.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:29:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-08-21 12:29:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 277. [2021-08-21 12:29:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.8949275362318843) internal successors, (799), 276 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 799 transitions. [2021-08-21 12:29:29,276 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 799 transitions. Word has length 20 [2021-08-21 12:29:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:29,276 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 799 transitions. [2021-08-21 12:29:29,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 799 transitions. [2021-08-21 12:29:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:29,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:29,277 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:29,296 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 12:29:29,496 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,SelfDestructingSolverStorable160 [2021-08-21 12:29:29,496 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash 863223697, now seen corresponding path program 10 times [2021-08-21 12:29:29,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:29,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109016767] [2021-08-21 12:29:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:29,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:29,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:29,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109016767] [2021-08-21 12:29:29,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109016767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:29,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193825630] [2021-08-21 12:29:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:29:29,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:29,863 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 12:29:29,865 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 12:29:31,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:29:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:29:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:31,798 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:31,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 89 [2021-08-21 12:29:32,476 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:32,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 146 [2021-08-21 12:29:32,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 125 [2021-08-21 12:29:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:33,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193825630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:33,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:33,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:29:33,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396254488] [2021-08-21 12:29:33,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:29:33,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:29:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:33,575 INFO L87 Difference]: Start difference. First operand 277 states and 799 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:35,933 INFO L93 Difference]: Finished difference Result 595 states and 1637 transitions. [2021-08-21 12:29:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:29:35,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:35,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:35,934 INFO L225 Difference]: With dead ends: 595 [2021-08-21 12:29:35,934 INFO L226 Difference]: Without dead ends: 551 [2021-08-21 12:29:35,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2409.6ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:29:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-08-21 12:29:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 280. [2021-08-21 12:29:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.903225806451613) internal successors, (810), 279 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 810 transitions. [2021-08-21 12:29:35,939 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 810 transitions. Word has length 20 [2021-08-21 12:29:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:35,939 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 810 transitions. [2021-08-21 12:29:35,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 810 transitions. [2021-08-21 12:29:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:35,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:35,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:35,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:36,146 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,SelfDestructingSolverStorable161 [2021-08-21 12:29:36,146 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1153255395, now seen corresponding path program 11 times [2021-08-21 12:29:36,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:36,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733325136] [2021-08-21 12:29:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:36,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:36,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:36,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733325136] [2021-08-21 12:29:36,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733325136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:36,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549885813] [2021-08-21 12:29:36,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:29:36,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:36,505 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 12:29:36,506 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 12:29:38,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:29:38,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:38,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:29:38,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:38,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 76 [2021-08-21 12:29:39,138 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 133 treesize of output 115 [2021-08-21 12:29:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 97 [2021-08-21 12:29:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:39,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549885813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:39,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:39,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:29:39,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652491397] [2021-08-21 12:29:39,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:29:39,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:29:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:29:39,697 INFO L87 Difference]: Start difference. First operand 280 states and 810 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:41,749 INFO L93 Difference]: Finished difference Result 452 states and 1292 transitions. [2021-08-21 12:29:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:29:41,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:41,750 INFO L225 Difference]: With dead ends: 452 [2021-08-21 12:29:41,750 INFO L226 Difference]: Without dead ends: 437 [2021-08-21 12:29:41,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2278.4ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:29:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-21 12:29:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 286. [2021-08-21 12:29:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.9087719298245616) internal successors, (829), 285 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 829 transitions. [2021-08-21 12:29:41,754 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 829 transitions. Word has length 20 [2021-08-21 12:29:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:41,754 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 829 transitions. [2021-08-21 12:29:41,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 829 transitions. [2021-08-21 12:29:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:41,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:41,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:41,776 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 12:29:41,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:41,955 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash -841209761, now seen corresponding path program 12 times [2021-08-21 12:29:41,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:41,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706463923] [2021-08-21 12:29:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:41,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:42,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:42,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706463923] [2021-08-21 12:29:42,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706463923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:42,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652751280] [2021-08-21 12:29:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:29:42,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:42,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:42,226 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 12:29:42,228 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 12:29:43,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:29:43,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:43,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:29:43,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:44,648 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:44,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 102 [2021-08-21 12:29:45,096 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:45,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 159 [2021-08-21 12:29:45,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2021-08-21 12:29:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:46,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652751280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:46,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:46,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:29:46,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096564092] [2021-08-21 12:29:46,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:29:46,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:29:46,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:46,450 INFO L87 Difference]: Start difference. First operand 286 states and 829 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:48,787 INFO L93 Difference]: Finished difference Result 597 states and 1617 transitions. [2021-08-21 12:29:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:29:48,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:48,788 INFO L225 Difference]: With dead ends: 597 [2021-08-21 12:29:48,788 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 12:29:48,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2381.6ms TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:29:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 12:29:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 283. [2021-08-21 12:29:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.900709219858156) internal successors, (818), 282 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 818 transitions. [2021-08-21 12:29:48,792 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 818 transitions. Word has length 20 [2021-08-21 12:29:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:48,792 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 818 transitions. [2021-08-21 12:29:48,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 818 transitions. [2021-08-21 12:29:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:48,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:48,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:48,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 12:29:49,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:49,013 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1304960999, now seen corresponding path program 13 times [2021-08-21 12:29:49,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:49,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331350594] [2021-08-21 12:29:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:49,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:49,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:49,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331350594] [2021-08-21 12:29:49,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331350594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:49,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688939323] [2021-08-21 12:29:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:29:49,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:49,353 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 12:29:49,366 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 12:29:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:29:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:51,790 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:51,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 99 [2021-08-21 12:29:52,434 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:52,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 164 [2021-08-21 12:29:52,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 139 [2021-08-21 12:29:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:53,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688939323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:53,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:29:53,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:29:53,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180152245] [2021-08-21 12:29:53,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:29:53,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:29:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:29:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:29:53,670 INFO L87 Difference]: Start difference. First operand 283 states and 818 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:29:56,553 INFO L93 Difference]: Finished difference Result 571 states and 1572 transitions. [2021-08-21 12:29:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:29:56,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:29:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:29:56,554 INFO L225 Difference]: With dead ends: 571 [2021-08-21 12:29:56,554 INFO L226 Difference]: Without dead ends: 499 [2021-08-21 12:29:56,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3068.5ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:29:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-21 12:29:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 280. [2021-08-21 12:29:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.903225806451613) internal successors, (810), 279 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 810 transitions. [2021-08-21 12:29:56,558 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 810 transitions. Word has length 20 [2021-08-21 12:29:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:29:56,558 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 810 transitions. [2021-08-21 12:29:56,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:29:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 810 transitions. [2021-08-21 12:29:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:29:56,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:29:56,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:29:56,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:29:56,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:56,769 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:29:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:29:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 977448749, now seen corresponding path program 14 times [2021-08-21 12:29:56,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:29:56,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354724972] [2021-08-21 12:29:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:29:56,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:29:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:29:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:29:57,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:29:57,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354724972] [2021-08-21 12:29:57,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354724972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:29:57,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707135925] [2021-08-21 12:29:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:29:57,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:29:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:29:57,022 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 12:29:57,023 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 12:29:58,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:29:58,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:29:58,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:29:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:29:59,454 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:29:59,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 102 [2021-08-21 12:30:01,667 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:01,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 152 [2021-08-21 12:30:01,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 127 [2021-08-21 12:30:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:02,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707135925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:02,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:02,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:30:02,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746391833] [2021-08-21 12:30:02,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:02,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:02,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:02,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:02,264 INFO L87 Difference]: Start difference. First operand 280 states and 810 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:03,945 INFO L93 Difference]: Finished difference Result 541 states and 1503 transitions. [2021-08-21 12:30:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:30:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:30:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:03,946 INFO L225 Difference]: With dead ends: 541 [2021-08-21 12:30:03,946 INFO L226 Difference]: Without dead ends: 479 [2021-08-21 12:30:03,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1694.5ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:30:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-21 12:30:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 292. [2021-08-21 12:30:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9003436426116838) internal successors, (844), 291 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 844 transitions. [2021-08-21 12:30:03,980 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 844 transitions. Word has length 20 [2021-08-21 12:30:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:03,980 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 844 transitions. [2021-08-21 12:30:03,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 844 transitions. [2021-08-21 12:30:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:30:03,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:03,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:04,001 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 12:30:04,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:04,194 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2108693741, now seen corresponding path program 15 times [2021-08-21 12:30:04,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:04,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061727467] [2021-08-21 12:30:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:04,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:04,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:04,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061727467] [2021-08-21 12:30:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061727467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:04,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413246746] [2021-08-21 12:30:04,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:04,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:04,527 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 12:30:04,528 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 12:30:06,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:30:06,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:06,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:30:06,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:07,046 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 99 [2021-08-21 12:30:08,529 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:08,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 164 [2021-08-21 12:30:08,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 135 [2021-08-21 12:30:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:09,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413246746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:09,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:09,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:30:09,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650563882] [2021-08-21 12:30:09,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:09,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:09,748 INFO L87 Difference]: Start difference. First operand 292 states and 844 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:12,681 INFO L93 Difference]: Finished difference Result 697 states and 1899 transitions. [2021-08-21 12:30:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:30:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:30:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:12,682 INFO L225 Difference]: With dead ends: 697 [2021-08-21 12:30:12,682 INFO L226 Difference]: Without dead ends: 625 [2021-08-21 12:30:12,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2987.5ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:30:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-08-21 12:30:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 297. [2021-08-21 12:30:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9121621621621623) internal successors, (862), 296 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 862 transitions. [2021-08-21 12:30:12,687 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 862 transitions. Word has length 20 [2021-08-21 12:30:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:12,687 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 862 transitions. [2021-08-21 12:30:12,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 862 transitions. [2021-08-21 12:30:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:30:12,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:12,688 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:12,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:12,888 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,SelfDestructingSolverStorable166 [2021-08-21 12:30:12,888 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1243887571, now seen corresponding path program 16 times [2021-08-21 12:30:12,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:12,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092141495] [2021-08-21 12:30:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:12,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:13,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:13,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092141495] [2021-08-21 12:30:13,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092141495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:13,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050296965] [2021-08-21 12:30:13,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:13,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:13,351 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 12:30:13,353 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 12:30:15,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:30:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:15,998 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 88 [2021-08-21 12:30:17,305 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:17,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 130 [2021-08-21 12:30:17,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 105 [2021-08-21 12:30:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:17,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050296965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:17,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:17,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:30:17,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228617577] [2021-08-21 12:30:17,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:17,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:17,914 INFO L87 Difference]: Start difference. First operand 297 states and 862 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:19,078 INFO L93 Difference]: Finished difference Result 484 states and 1390 transitions. [2021-08-21 12:30:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:30:19,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:30:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:19,079 INFO L225 Difference]: With dead ends: 484 [2021-08-21 12:30:19,079 INFO L226 Difference]: Without dead ends: 469 [2021-08-21 12:30:19,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1228.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:30:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-21 12:30:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 303. [2021-08-21 12:30:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9172185430463577) internal successors, (881), 302 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 881 transitions. [2021-08-21 12:30:19,084 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 881 transitions. Word has length 20 [2021-08-21 12:30:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:19,084 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 881 transitions. [2021-08-21 12:30:19,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 881 transitions. [2021-08-21 12:30:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:30:19,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:19,085 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:19,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:19,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:19,306 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1056614569, now seen corresponding path program 17 times [2021-08-21 12:30:19,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:19,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455837452] [2021-08-21 12:30:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:19,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:19,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:19,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455837452] [2021-08-21 12:30:19,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455837452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:19,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485584111] [2021-08-21 12:30:19,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:19,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:19,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:19,655 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 12:30:19,656 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 12:30:21,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:30:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:22,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 86 [2021-08-21 12:30:22,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2021-08-21 12:30:22,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 127 [2021-08-21 12:30:23,973 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 12:30:23,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485584111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:23,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:23,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:30:23,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800839093] [2021-08-21 12:30:23,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:30:23,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:30:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:30:23,974 INFO L87 Difference]: Start difference. First operand 303 states and 881 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:27,313 INFO L93 Difference]: Finished difference Result 629 states and 1715 transitions. [2021-08-21 12:30:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:30:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:30:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,315 INFO L225 Difference]: With dead ends: 629 [2021-08-21 12:30:27,315 INFO L226 Difference]: Without dead ends: 557 [2021-08-21 12:30:27,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3498.7ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:30:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-08-21 12:30:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 300. [2021-08-21 12:30:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9096989966555182) internal successors, (870), 299 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 870 transitions. [2021-08-21 12:30:27,321 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 870 transitions. Word has length 20 [2021-08-21 12:30:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:27,321 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 870 transitions. [2021-08-21 12:30:27,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 870 transitions. [2021-08-21 12:30:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:30:27,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,352 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 12:30:27,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 12:30:27,533 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1092181967, now seen corresponding path program 18 times [2021-08-21 12:30:27,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52119912] [2021-08-21 12:30:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,834 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 12:30:27,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52119912] [2021-08-21 12:30:27,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52119912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:27,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751599618] [2021-08-21 12:30:27,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:27,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:27,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:27,836 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 12:30:27,837 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 12:30:29,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:30:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:30:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:30,817 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:30,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 102 [2021-08-21 12:30:31,595 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:31,596 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 178 treesize of output 159 [2021-08-21 12:30:31,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 134 [2021-08-21 12:30:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:32,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751599618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:32,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:32,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:30:32,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625121883] [2021-08-21 12:30:32,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:32,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:32,729 INFO L87 Difference]: Start difference. First operand 300 states and 870 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:34,516 INFO L93 Difference]: Finished difference Result 615 states and 1705 transitions. [2021-08-21 12:30:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:30:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:30:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:34,517 INFO L225 Difference]: With dead ends: 615 [2021-08-21 12:30:34,517 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 12:30:34,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1850.9ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:30:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 12:30:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 297. [2021-08-21 12:30:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9121621621621623) internal successors, (862), 296 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 862 transitions. [2021-08-21 12:30:34,522 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 862 transitions. Word has length 20 [2021-08-21 12:30:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:34,522 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 862 transitions. [2021-08-21 12:30:34,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 862 transitions. [2021-08-21 12:30:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:30:34,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:34,523 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:34,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 12:30:34,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 12:30:34,737 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash -595490201, now seen corresponding path program 19 times [2021-08-21 12:30:34,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:34,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807520756] [2021-08-21 12:30:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:34,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:35,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:35,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807520756] [2021-08-21 12:30:35,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807520756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:35,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140216650] [2021-08-21 12:30:35,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:35,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:35,066 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 12:30:35,068 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 12:30:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:30:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:37,667 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 97 [2021-08-21 12:30:41,213 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:41,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 144 [2021-08-21 12:30:41,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 121 [2021-08-21 12:30:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:41,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140216650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:41,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:41,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:30:41,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495523521] [2021-08-21 12:30:41,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:41,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:41,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:41,887 INFO L87 Difference]: Start difference. First operand 297 states and 862 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:43,373 INFO L93 Difference]: Finished difference Result 636 states and 1760 transitions. [2021-08-21 12:30:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:30:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:30:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:43,374 INFO L225 Difference]: With dead ends: 636 [2021-08-21 12:30:43,374 INFO L226 Difference]: Without dead ends: 596 [2021-08-21 12:30:43,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1527.8ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:30:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-08-21 12:30:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 304. [2021-08-21 12:30:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9207920792079207) internal successors, (885), 303 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 885 transitions. [2021-08-21 12:30:43,379 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 885 transitions. Word has length 20 [2021-08-21 12:30:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:43,379 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 885 transitions. [2021-08-21 12:30:43,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 885 transitions. [2021-08-21 12:30:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:30:43,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:43,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:43,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:43,590 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,SelfDestructingSolverStorable170 [2021-08-21 12:30:43,590 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash 535754791, now seen corresponding path program 20 times [2021-08-21 12:30:43,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:43,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585342612] [2021-08-21 12:30:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:43,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:43,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:43,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585342612] [2021-08-21 12:30:43,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585342612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:43,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252040763] [2021-08-21 12:30:43,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:43,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:43,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:43,954 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 12:30:43,956 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 12:30:46,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:46,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:46,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:30:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:46,629 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:46,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 106 [2021-08-21 12:30:49,235 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:49,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 162 [2021-08-21 12:30:49,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2021-08-21 12:30:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:50,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252040763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:50,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:50,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:30:50,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748305610] [2021-08-21 12:30:50,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:50,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:50,809 INFO L87 Difference]: Start difference. First operand 304 states and 885 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:53,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:53,627 INFO L93 Difference]: Finished difference Result 683 states and 1887 transitions. [2021-08-21 12:30:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:30:53,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:30:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:53,629 INFO L225 Difference]: With dead ends: 683 [2021-08-21 12:30:53,629 INFO L226 Difference]: Without dead ends: 653 [2021-08-21 12:30:53,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2863.8ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:30:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-08-21 12:30:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 304. [2021-08-21 12:30:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9207920792079207) internal successors, (885), 303 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 885 transitions. [2021-08-21 12:30:53,635 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 885 transitions. Word has length 20 [2021-08-21 12:30:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:53,635 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 885 transitions. [2021-08-21 12:30:53,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 885 transitions. [2021-08-21 12:30:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:30:53,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:53,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:53,667 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 12:30:53,851 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,SelfDestructingSolverStorable171 [2021-08-21 12:30:53,851 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:30:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash 558351339, now seen corresponding path program 21 times [2021-08-21 12:30:53,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:53,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227093157] [2021-08-21 12:30:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:53,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:54,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:54,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227093157] [2021-08-21 12:30:54,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227093157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:54,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639199029] [2021-08-21 12:30:54,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:54,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:54,165 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 12:30:54,183 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 12:30:56,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:30:56,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:30:56,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:56,985 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:56,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 98 [2021-08-21 12:30:58,745 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:30:58,745 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 172 treesize of output 153 [2021-08-21 12:30:58,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 122 [2021-08-21 12:30:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:59,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639199029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:59,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:59,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:30:59,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810988294] [2021-08-21 12:30:59,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:30:59,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:59,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:30:59,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:30:59,660 INFO L87 Difference]: Start difference. First operand 304 states and 885 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:02,802 INFO L93 Difference]: Finished difference Result 821 states and 2257 transitions. [2021-08-21 12:31:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:31:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:31:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:02,804 INFO L225 Difference]: With dead ends: 821 [2021-08-21 12:31:02,804 INFO L226 Difference]: Without dead ends: 776 [2021-08-21 12:31:02,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3078.3ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:31:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-08-21 12:31:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 327. [2021-08-21 12:31:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.996932515337423) internal successors, (977), 326 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 977 transitions. [2021-08-21 12:31:02,810 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 977 transitions. Word has length 20 [2021-08-21 12:31:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:02,810 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 977 transitions. [2021-08-21 12:31:02,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 977 transitions. [2021-08-21 12:31:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:31:02,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:02,810 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:02,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:03,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:03,011 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:31:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash -443781239, now seen corresponding path program 22 times [2021-08-21 12:31:03,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:03,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210124546] [2021-08-21 12:31:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:03,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:03,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:03,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210124546] [2021-08-21 12:31:03,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210124546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:03,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121214544] [2021-08-21 12:31:03,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:31:03,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:03,332 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 12:31:03,333 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 12:31:05,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:31:05,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:31:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:06,187 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:06,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 100 [2021-08-21 12:31:07,966 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:07,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 152 [2021-08-21 12:31:07,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 126 [2021-08-21 12:31:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:08,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121214544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:08,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:08,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:31:08,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830519563] [2021-08-21 12:31:08,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:08,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:08,844 INFO L87 Difference]: Start difference. First operand 327 states and 977 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:10,841 INFO L93 Difference]: Finished difference Result 670 states and 1874 transitions. [2021-08-21 12:31:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:31:10,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:31:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:10,843 INFO L225 Difference]: With dead ends: 670 [2021-08-21 12:31:10,843 INFO L226 Difference]: Without dead ends: 640 [2021-08-21 12:31:10,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2042.0ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:31:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-08-21 12:31:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 335. [2021-08-21 12:31:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0149700598802394) internal successors, (1007), 334 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1007 transitions. [2021-08-21 12:31:10,859 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1007 transitions. Word has length 20 [2021-08-21 12:31:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:10,859 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1007 transitions. [2021-08-21 12:31:10,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1007 transitions. [2021-08-21 12:31:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:31:10,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:10,860 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:10,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:11,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:11,081 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:31:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash 846600581, now seen corresponding path program 23 times [2021-08-21 12:31:11,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:11,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076724882] [2021-08-21 12:31:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:11,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:11,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:11,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076724882] [2021-08-21 12:31:11,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076724882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:11,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210011692] [2021-08-21 12:31:11,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:11,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:11,418 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 12:31:11,419 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 12:31:13,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:31:13,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:13,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:31:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:14,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2021-08-21 12:31:15,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2021-08-21 12:31:15,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 127 [2021-08-21 12:31:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:16,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210011692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:16,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:16,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:31:16,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137493702] [2021-08-21 12:31:16,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:31:16,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:16,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:31:16,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:31:16,055 INFO L87 Difference]: Start difference. First operand 335 states and 1007 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:20,757 INFO L93 Difference]: Finished difference Result 865 states and 2457 transitions. [2021-08-21 12:31:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:31:20,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:31:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:20,758 INFO L225 Difference]: With dead ends: 865 [2021-08-21 12:31:20,758 INFO L226 Difference]: Without dead ends: 835 [2021-08-21 12:31:20,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4784.0ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:31:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-08-21 12:31:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 341. [2021-08-21 12:31:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-08-21 12:31:20,764 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 20 [2021-08-21 12:31:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:20,764 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-08-21 12:31:20,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-08-21 12:31:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:31:20,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:20,765 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:20,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:20,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:20,980 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:31:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1917060185, now seen corresponding path program 24 times [2021-08-21 12:31:20,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:20,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592910212] [2021-08-21 12:31:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:20,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:21,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:21,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592910212] [2021-08-21 12:31:21,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592910212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:21,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892869791] [2021-08-21 12:31:21,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:21,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:21,281 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 12:31:21,282 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 12:31:23,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:31:23,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:31:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:24,248 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:24,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 88 [2021-08-21 12:31:25,712 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:25,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 123 [2021-08-21 12:31:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2021-08-21 12:31:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:26,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892869791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:26,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:26,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:31:26,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84623919] [2021-08-21 12:31:26,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:26,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:26,289 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:29,390 INFO L93 Difference]: Finished difference Result 761 states and 2170 transitions. [2021-08-21 12:31:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:31:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:31:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:29,391 INFO L225 Difference]: With dead ends: 761 [2021-08-21 12:31:29,391 INFO L226 Difference]: Without dead ends: 695 [2021-08-21 12:31:29,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2890.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:31:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-08-21 12:31:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 347. [2021-08-21 12:31:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.040462427745665) internal successors, (1052), 346 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1052 transitions. [2021-08-21 12:31:29,419 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1052 transitions. Word has length 20 [2021-08-21 12:31:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:29,419 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1052 transitions. [2021-08-21 12:31:29,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1052 transitions. [2021-08-21 12:31:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:31:29,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:29,419 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:29,464 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 12:31:29,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:29,620 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:31:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -40928793, now seen corresponding path program 25 times [2021-08-21 12:31:29,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:29,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798028478] [2021-08-21 12:31:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:29,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:29,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:29,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798028478] [2021-08-21 12:31:29,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798028478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:29,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677019183] [2021-08-21 12:31:29,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:29,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:29,921 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 12:31:29,922 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 12:31:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:31:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:33,011 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:33,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 97 [2021-08-21 12:31:34,027 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:34,028 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 157 [2021-08-21 12:31:34,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 122 [2021-08-21 12:31:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:35,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677019183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:35,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:35,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:31:35,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409262650] [2021-08-21 12:31:35,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:35,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:35,436 INFO L87 Difference]: Start difference. First operand 347 states and 1052 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:39,636 INFO L93 Difference]: Finished difference Result 821 states and 2313 transitions. [2021-08-21 12:31:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:31:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:31:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:39,638 INFO L225 Difference]: With dead ends: 821 [2021-08-21 12:31:39,638 INFO L226 Difference]: Without dead ends: 791 [2021-08-21 12:31:39,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4097.1ms TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:31:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-21 12:31:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 350. [2021-08-21 12:31:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0573065902578795) internal successors, (1067), 349 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1067 transitions. [2021-08-21 12:31:39,645 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1067 transitions. Word has length 20 [2021-08-21 12:31:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:39,645 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1067 transitions. [2021-08-21 12:31:39,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1067 transitions. [2021-08-21 12:31:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:31:39,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:39,646 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:39,677 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 12:31:39,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:39,873 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:31:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:39,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1944022027, now seen corresponding path program 26 times [2021-08-21 12:31:39,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:39,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693454987] [2021-08-21 12:31:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:39,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:40,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:40,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693454987] [2021-08-21 12:31:40,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693454987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:40,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754090646] [2021-08-21 12:31:40,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:40,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:40,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:40,168 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 12:31:40,168 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 12:31:42,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:42,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:31:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:43,331 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:43,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 106 [2021-08-21 12:31:44,390 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:44,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 162 [2021-08-21 12:31:44,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 132 [2021-08-21 12:31:45,975 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 12:31:45,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754090646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:45,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:45,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:31:45,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215485127] [2021-08-21 12:31:45,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:45,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:45,976 INFO L87 Difference]: Start difference. First operand 350 states and 1067 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:49,899 INFO L93 Difference]: Finished difference Result 984 states and 2719 transitions. [2021-08-21 12:31:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:31:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:31:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:49,901 INFO L225 Difference]: With dead ends: 984 [2021-08-21 12:31:49,901 INFO L226 Difference]: Without dead ends: 924 [2021-08-21 12:31:49,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3830.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1109, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:31:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-08-21 12:31:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 358. [2021-08-21 12:31:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0980392156862746) internal successors, (1106), 357 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1106 transitions. [2021-08-21 12:31:49,907 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1106 transitions. Word has length 20 [2021-08-21 12:31:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:49,907 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1106 transitions. [2021-08-21 12:31:49,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1106 transitions. [2021-08-21 12:31:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:31:49,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:49,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:49,933 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 12:31:50,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:50,125 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:31:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1229548317, now seen corresponding path program 27 times [2021-08-21 12:31:50,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:50,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666908779] [2021-08-21 12:31:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:50,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:50,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:50,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666908779] [2021-08-21 12:31:50,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666908779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:50,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832405527] [2021-08-21 12:31:50,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:31:50,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:50,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:50,573 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 12:31:50,574 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 12:31:53,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:31:53,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:31:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:54,087 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:54,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 100 [2021-08-21 12:31:55,271 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:31:55,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:31:55,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 125 [2021-08-21 12:31:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:57,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832405527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:57,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:57,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:31:57,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664361597] [2021-08-21 12:31:57,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:31:57,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:31:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:31:57,049 INFO L87 Difference]: Start difference. First operand 358 states and 1106 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:00,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:00,946 INFO L93 Difference]: Finished difference Result 857 states and 2428 transitions. [2021-08-21 12:32:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:32:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:32:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:00,948 INFO L225 Difference]: With dead ends: 857 [2021-08-21 12:32:00,948 INFO L226 Difference]: Without dead ends: 827 [2021-08-21 12:32:00,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3810.2ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:32:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-21 12:32:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 358. [2021-08-21 12:32:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0980392156862746) internal successors, (1106), 357 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1106 transitions. [2021-08-21 12:32:00,954 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1106 transitions. Word has length 20 [2021-08-21 12:32:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:00,954 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1106 transitions. [2021-08-21 12:32:00,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1106 transitions. [2021-08-21 12:32:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:32:00,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:00,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:00,980 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 12:32:01,155 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,SelfDestructingSolverStorable178 [2021-08-21 12:32:01,155 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:32:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:01,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2105278311, now seen corresponding path program 28 times [2021-08-21 12:32:01,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:01,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385128707] [2021-08-21 12:32:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:01,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:01,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:01,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385128707] [2021-08-21 12:32:01,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385128707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:01,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76567892] [2021-08-21 12:32:01,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:32:01,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:01,516 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 12:32:01,517 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 12:32:04,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:32:04,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:32:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:04,637 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:04,638 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 123 treesize of output 106 [2021-08-21 12:32:05,849 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:05,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 164 [2021-08-21 12:32:05,853 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 158 treesize of output 132 [2021-08-21 12:32:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:07,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76567892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:07,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:07,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:32:07,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43853352] [2021-08-21 12:32:07,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:32:07,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:32:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:07,501 INFO L87 Difference]: Start difference. First operand 358 states and 1106 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:11,493 INFO L93 Difference]: Finished difference Result 1009 states and 2785 transitions. [2021-08-21 12:32:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:32:11,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:32:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:11,494 INFO L225 Difference]: With dead ends: 1009 [2021-08-21 12:32:11,494 INFO L226 Difference]: Without dead ends: 935 [2021-08-21 12:32:11,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3966.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:32:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-08-21 12:32:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 357. [2021-08-21 12:32:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.092696629213483) internal successors, (1101), 356 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1101 transitions. [2021-08-21 12:32:11,501 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1101 transitions. Word has length 20 [2021-08-21 12:32:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:11,501 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1101 transitions. [2021-08-21 12:32:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1101 transitions. [2021-08-21 12:32:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:32:11,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:11,501 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:11,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 12:32:11,702 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,SelfDestructingSolverStorable179 [2021-08-21 12:32:11,702 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:32:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 984947383, now seen corresponding path program 29 times [2021-08-21 12:32:11,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:11,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718736962] [2021-08-21 12:32:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:11,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:12,070 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 12:32:12,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:12,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718736962] [2021-08-21 12:32:12,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718736962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:12,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511045508] [2021-08-21 12:32:12,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:32:12,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:12,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:12,071 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 12:32:12,072 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 12:32:15,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:32:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:15,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:32:15,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2021-08-21 12:32:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2021-08-21 12:32:16,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 133 [2021-08-21 12:32:17,815 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 12:32:17,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511045508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:17,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:17,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:32:17,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567627512] [2021-08-21 12:32:17,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:32:17,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:32:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:32:17,816 INFO L87 Difference]: Start difference. First operand 357 states and 1101 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:21,397 INFO L93 Difference]: Finished difference Result 709 states and 2033 transitions. [2021-08-21 12:32:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:32:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:32:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:21,399 INFO L225 Difference]: With dead ends: 709 [2021-08-21 12:32:21,399 INFO L226 Difference]: Without dead ends: 679 [2021-08-21 12:32:21,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3787.1ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:32:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-08-21 12:32:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 357. [2021-08-21 12:32:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.092696629213483) internal successors, (1101), 356 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1101 transitions. [2021-08-21 12:32:21,407 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1101 transitions. Word has length 20 [2021-08-21 12:32:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:21,407 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1101 transitions. [2021-08-21 12:32:21,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1101 transitions. [2021-08-21 12:32:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:32:21,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:21,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:21,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:21,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-08-21 12:32:21,633 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:32:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash 24806715, now seen corresponding path program 30 times [2021-08-21 12:32:21,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:21,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701073231] [2021-08-21 12:32:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:21,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:21,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:21,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701073231] [2021-08-21 12:32:21,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701073231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:21,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708591272] [2021-08-21 12:32:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:32:21,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:21,993 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 12:32:21,994 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 12:32:25,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:32:25,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:32:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:25,476 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:25,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 91 [2021-08-21 12:32:26,462 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:26,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 126 [2021-08-21 12:32:26,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 99 [2021-08-21 12:32:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:27,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708591272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:27,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:27,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:32:27,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241065055] [2021-08-21 12:32:27,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:32:27,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:32:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:27,585 INFO L87 Difference]: Start difference. First operand 357 states and 1101 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:30,214 INFO L93 Difference]: Finished difference Result 797 states and 2260 transitions. [2021-08-21 12:32:30,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:32:30,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:32:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:30,215 INFO L225 Difference]: With dead ends: 797 [2021-08-21 12:32:30,215 INFO L226 Difference]: Without dead ends: 752 [2021-08-21 12:32:30,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2515.2ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:32:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-08-21 12:32:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 357. [2021-08-21 12:32:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.092696629213483) internal successors, (1101), 356 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1101 transitions. [2021-08-21 12:32:30,221 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1101 transitions. Word has length 20 [2021-08-21 12:32:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:30,221 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1101 transitions. [2021-08-21 12:32:30,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1101 transitions. [2021-08-21 12:32:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:32:30,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:30,222 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:30,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:30,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:30,437 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:32:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1941209491, now seen corresponding path program 31 times [2021-08-21 12:32:30,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:30,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008156597] [2021-08-21 12:32:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:30,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:30,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:30,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008156597] [2021-08-21 12:32:30,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008156597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:30,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806661620] [2021-08-21 12:32:30,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:32:30,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:30,670 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 12:32:30,671 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 12:32:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:33,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:32:33,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:34,407 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:34,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:32:36,426 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 128 [2021-08-21 12:32:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 107 [2021-08-21 12:32:37,188 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 12:32:37,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806661620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:37,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:37,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:32:37,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598408461] [2021-08-21 12:32:37,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:32:37,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:32:37,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:37,189 INFO L87 Difference]: Start difference. First operand 357 states and 1101 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:39,035 INFO L93 Difference]: Finished difference Result 612 states and 1804 transitions. [2021-08-21 12:32:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:32:39,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:32:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:39,037 INFO L225 Difference]: With dead ends: 612 [2021-08-21 12:32:39,037 INFO L226 Difference]: Without dead ends: 582 [2021-08-21 12:32:39,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1776.7ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:32:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-08-21 12:32:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 361. [2021-08-21 12:32:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.102777777777778) internal successors, (1117), 360 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1117 transitions. [2021-08-21 12:32:39,041 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1117 transitions. Word has length 20 [2021-08-21 12:32:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:39,041 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1117 transitions. [2021-08-21 12:32:39,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1117 transitions. [2021-08-21 12:32:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:32:39,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:39,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:39,069 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 12:32:39,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:39,261 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:32:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1621293401, now seen corresponding path program 32 times [2021-08-21 12:32:39,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:39,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708801826] [2021-08-21 12:32:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:39,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:39,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:39,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708801826] [2021-08-21 12:32:39,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708801826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:39,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223310080] [2021-08-21 12:32:39,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:32:39,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:39,563 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 12:32:39,615 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 12:32:42,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:32:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:32:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:43,527 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:43,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 95 [2021-08-21 12:32:45,690 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 165 [2021-08-21 12:32:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 134 [2021-08-21 12:32:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:46,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223310080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:46,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:46,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:32:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824657268] [2021-08-21 12:32:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:32:46,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:32:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:46,709 INFO L87 Difference]: Start difference. First operand 361 states and 1117 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:48,455 INFO L93 Difference]: Finished difference Result 645 states and 1841 transitions. [2021-08-21 12:32:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:32:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:32:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:48,457 INFO L225 Difference]: With dead ends: 645 [2021-08-21 12:32:48,457 INFO L226 Difference]: Without dead ends: 588 [2021-08-21 12:32:48,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1801.3ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:32:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-08-21 12:32:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 364. [2021-08-21 12:32:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.1101928374655645) internal successors, (1129), 363 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1129 transitions. [2021-08-21 12:32:48,462 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1129 transitions. Word has length 20 [2021-08-21 12:32:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:48,462 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1129 transitions. [2021-08-21 12:32:48,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1129 transitions. [2021-08-21 12:32:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:32:48,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:48,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:48,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 12:32:48,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 12:32:48,663 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:32:48,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash -133709071, now seen corresponding path program 33 times [2021-08-21 12:32:48,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:48,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249895647] [2021-08-21 12:32:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:48,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:48,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:48,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249895647] [2021-08-21 12:32:48,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249895647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:48,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676455505] [2021-08-21 12:32:48,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:32:48,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:48,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:48,992 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 12:32:48,993 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 12:32:52,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:32:52,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:52,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:32:52,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:53,109 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:53,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 93 [2021-08-21 12:32:55,176 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:32:55,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 141 [2021-08-21 12:32:55,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 114 [2021-08-21 12:32:55,775 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 12:32:55,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676455505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:55,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:55,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:32:55,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987999274] [2021-08-21 12:32:55,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:32:55,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:32:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:55,776 INFO L87 Difference]: Start difference. First operand 364 states and 1129 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:56,912 INFO L93 Difference]: Finished difference Result 581 states and 1733 transitions. [2021-08-21 12:32:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:32:56,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:32:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:56,913 INFO L225 Difference]: With dead ends: 581 [2021-08-21 12:32:56,913 INFO L226 Difference]: Without dead ends: 566 [2021-08-21 12:32:56,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1159.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:32:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-21 12:32:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 367. [2021-08-21 12:32:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1147540983606556) internal successors, (1140), 366 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1140 transitions. [2021-08-21 12:32:56,918 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1140 transitions. Word has length 20 [2021-08-21 12:32:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:56,918 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1140 transitions. [2021-08-21 12:32:56,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1140 transitions. [2021-08-21 12:32:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:32:56,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:56,919 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:56,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:57,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:57,119 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:32:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1766710445, now seen corresponding path program 34 times [2021-08-21 12:32:57,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:57,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592596286] [2021-08-21 12:32:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:57,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:57,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:57,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592596286] [2021-08-21 12:32:57,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592596286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:57,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912138207] [2021-08-21 12:32:57,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:32:57,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:57,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:57,427 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 12:32:57,428 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 12:33:01,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:33:01,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:33:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:01,605 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:01,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:33:03,609 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:03,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:33:03,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 117 [2021-08-21 12:33:04,770 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 12:33:04,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912138207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:04,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:04,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:33:04,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388304968] [2021-08-21 12:33:04,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:33:04,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:04,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:33:04,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:04,777 INFO L87 Difference]: Start difference. First operand 367 states and 1140 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:07,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:07,335 INFO L93 Difference]: Finished difference Result 729 states and 2069 transitions. [2021-08-21 12:33:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:33:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:33:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:07,337 INFO L225 Difference]: With dead ends: 729 [2021-08-21 12:33:07,337 INFO L226 Difference]: Without dead ends: 657 [2021-08-21 12:33:07,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2443.7ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:33:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-21 12:33:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 364. [2021-08-21 12:33:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.1101928374655645) internal successors, (1129), 363 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1129 transitions. [2021-08-21 12:33:07,342 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1129 transitions. Word has length 20 [2021-08-21 12:33:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:07,342 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1129 transitions. [2021-08-21 12:33:07,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1129 transitions. [2021-08-21 12:33:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:33:07,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:07,343 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:07,369 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 12:33:07,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:07,543 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:33:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2139784363, now seen corresponding path program 35 times [2021-08-21 12:33:07,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:07,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471426039] [2021-08-21 12:33:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:07,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:07,827 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 12:33:07,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:07,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471426039] [2021-08-21 12:33:07,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471426039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:07,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878796188] [2021-08-21 12:33:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:33:07,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:07,828 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 12:33:07,829 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 12:33:11,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:33:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:33:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:11,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2021-08-21 12:33:12,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 126 [2021-08-21 12:33:12,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2021-08-21 12:33:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878796188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:13,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:33:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687324436] [2021-08-21 12:33:13,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:33:13,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:33:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:33:13,462 INFO L87 Difference]: Start difference. First operand 364 states and 1129 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:16,598 INFO L93 Difference]: Finished difference Result 792 states and 2255 transitions. [2021-08-21 12:33:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:33:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:33:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:16,599 INFO L225 Difference]: With dead ends: 792 [2021-08-21 12:33:16,600 INFO L226 Difference]: Without dead ends: 762 [2021-08-21 12:33:16,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3181.7ms TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:33:16,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-21 12:33:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 367. [2021-08-21 12:33:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1256830601092895) internal successors, (1144), 366 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1144 transitions. [2021-08-21 12:33:16,605 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1144 transitions. Word has length 20 [2021-08-21 12:33:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:16,605 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1144 transitions. [2021-08-21 12:33:16,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1144 transitions. [2021-08-21 12:33:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:33:16,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:16,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:16,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 12:33:16,820 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,SelfDestructingSolverStorable186 [2021-08-21 12:33:16,821 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:33:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash -170232113, now seen corresponding path program 36 times [2021-08-21 12:33:16,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:16,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983822138] [2021-08-21 12:33:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:16,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:17,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:17,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983822138] [2021-08-21 12:33:17,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983822138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:17,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352146260] [2021-08-21 12:33:17,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:33:17,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:17,193 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 12:33:17,217 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 12:33:21,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:33:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:33:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:21,552 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:21,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 92 [2021-08-21 12:33:22,306 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:22,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 157 [2021-08-21 12:33:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2021-08-21 12:33:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:23,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352146260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:23,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:23,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:33:23,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105324526] [2021-08-21 12:33:23,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:33:23,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:33:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:23,901 INFO L87 Difference]: Start difference. First operand 367 states and 1144 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:28,164 INFO L93 Difference]: Finished difference Result 773 states and 2162 transitions. [2021-08-21 12:33:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:33:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:33:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:28,166 INFO L225 Difference]: With dead ends: 773 [2021-08-21 12:33:28,166 INFO L226 Difference]: Without dead ends: 728 [2021-08-21 12:33:28,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4193.2ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:33:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-08-21 12:33:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 371. [2021-08-21 12:33:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.1486486486486487) internal successors, (1165), 370 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1165 transitions. [2021-08-21 12:33:28,171 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1165 transitions. Word has length 20 [2021-08-21 12:33:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:28,172 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1165 transitions. [2021-08-21 12:33:28,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1165 transitions. [2021-08-21 12:33:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:33:28,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:28,172 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:28,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 12:33:28,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:28,389 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:33:28,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash 951164839, now seen corresponding path program 37 times [2021-08-21 12:33:28,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:28,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916332787] [2021-08-21 12:33:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:28,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:28,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:28,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916332787] [2021-08-21 12:33:28,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916332787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:28,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53978131] [2021-08-21 12:33:28,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:33:28,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:28,766 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 12:33:28,767 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 12:33:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:32,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:33:32,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:33,294 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:33,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 96 [2021-08-21 12:33:33,827 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:33,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-08-21 12:33:33,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 118 [2021-08-21 12:33:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:35,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53978131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:35,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:35,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:33:35,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729672236] [2021-08-21 12:33:35,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:33:35,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:35,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:33:35,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:35,617 INFO L87 Difference]: Start difference. First operand 371 states and 1165 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:38,249 INFO L93 Difference]: Finished difference Result 780 states and 2239 transitions. [2021-08-21 12:33:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:33:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:33:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:38,251 INFO L225 Difference]: With dead ends: 780 [2021-08-21 12:33:38,251 INFO L226 Difference]: Without dead ends: 750 [2021-08-21 12:33:38,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2685.2ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:33:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-08-21 12:33:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 371. [2021-08-21 12:33:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.1486486486486487) internal successors, (1165), 370 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1165 transitions. [2021-08-21 12:33:38,257 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1165 transitions. Word has length 20 [2021-08-21 12:33:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:38,257 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1165 transitions. [2021-08-21 12:33:38,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1165 transitions. [2021-08-21 12:33:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:33:38,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:38,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:38,287 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 12:33:38,480 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,SelfDestructingSolverStorable188 [2021-08-21 12:33:38,481 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:33:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash -8975829, now seen corresponding path program 38 times [2021-08-21 12:33:38,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:38,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986804039] [2021-08-21 12:33:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:38,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:38,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:38,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986804039] [2021-08-21 12:33:38,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986804039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:38,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560351584] [2021-08-21 12:33:38,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:33:38,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:38,739 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 12:33:38,765 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 12:33:42,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:33:42,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:33:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:43,416 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:43,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:33:44,053 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:44,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 148 [2021-08-21 12:33:44,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-08-21 12:33:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:45,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560351584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:45,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:45,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:33:45,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042285131] [2021-08-21 12:33:45,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:33:45,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:33:45,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:45,767 INFO L87 Difference]: Start difference. First operand 371 states and 1165 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:48,580 INFO L93 Difference]: Finished difference Result 768 states and 2201 transitions. [2021-08-21 12:33:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:33:48,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:33:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:48,581 INFO L225 Difference]: With dead ends: 768 [2021-08-21 12:33:48,581 INFO L226 Difference]: Without dead ends: 724 [2021-08-21 12:33:48,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2796.3ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:33:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-08-21 12:33:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 371. [2021-08-21 12:33:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.1486486486486487) internal successors, (1165), 370 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1165 transitions. [2021-08-21 12:33:48,587 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1165 transitions. Word has length 20 [2021-08-21 12:33:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:48,587 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1165 transitions. [2021-08-21 12:33:48,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1165 transitions. [2021-08-21 12:33:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:33:48,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:48,588 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:48,615 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 12:33:48,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 12:33:48,805 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:33:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:48,805 INFO L82 PathProgramCache]: Analyzing trace with hash 40794639, now seen corresponding path program 39 times [2021-08-21 12:33:48,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:48,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548336736] [2021-08-21 12:33:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:48,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:49,275 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 12:33:49,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:49,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548336736] [2021-08-21 12:33:49,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548336736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:49,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743547965] [2021-08-21 12:33:49,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:33:49,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:49,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:49,276 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 12:33:49,277 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 12:33:53,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:33:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:33:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:54,041 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 90 [2021-08-21 12:33:54,874 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:33:54,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 144 [2021-08-21 12:33:54,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 114 [2021-08-21 12:33:56,405 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 12:33:56,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743547965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:56,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:56,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:33:56,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154301675] [2021-08-21 12:33:56,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:33:56,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:33:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:56,406 INFO L87 Difference]: Start difference. First operand 371 states and 1165 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:57,858 INFO L93 Difference]: Finished difference Result 629 states and 1885 transitions. [2021-08-21 12:33:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:33:57,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:33:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:57,859 INFO L225 Difference]: With dead ends: 629 [2021-08-21 12:33:57,859 INFO L226 Difference]: Without dead ends: 607 [2021-08-21 12:33:57,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1562.2ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:33:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-08-21 12:33:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 369. [2021-08-21 12:33:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.141304347826087) internal successors, (1156), 368 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1156 transitions. [2021-08-21 12:33:57,864 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1156 transitions. Word has length 20 [2021-08-21 12:33:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:57,864 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1156 transitions. [2021-08-21 12:33:57,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1156 transitions. [2021-08-21 12:33:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:33:57,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:57,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:57,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:58,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:58,093 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:33:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash -203819107, now seen corresponding path program 40 times [2021-08-21 12:33:58,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:58,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609015851] [2021-08-21 12:33:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:58,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:58,372 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 12:33:58,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:58,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609015851] [2021-08-21 12:33:58,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609015851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:58,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049577103] [2021-08-21 12:33:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:33:58,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:58,375 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 12:33:58,375 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 12:34:02,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:34:02,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:34:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:03,055 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:03,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 89 [2021-08-21 12:34:04,635 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 137 [2021-08-21 12:34:04,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2021-08-21 12:34:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:05,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049577103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:05,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:05,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:34:05,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132856096] [2021-08-21 12:34:05,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:34:05,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:34:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:34:05,138 INFO L87 Difference]: Start difference. First operand 369 states and 1156 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:06,581 INFO L93 Difference]: Finished difference Result 585 states and 1749 transitions. [2021-08-21 12:34:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:34:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:34:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:06,582 INFO L225 Difference]: With dead ends: 585 [2021-08-21 12:34:06,582 INFO L226 Difference]: Without dead ends: 555 [2021-08-21 12:34:06,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1432.3ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:34:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-08-21 12:34:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 375. [2021-08-21 12:34:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.141711229946524) internal successors, (1175), 374 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1175 transitions. [2021-08-21 12:34:06,587 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1175 transitions. Word has length 20 [2021-08-21 12:34:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:06,587 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1175 transitions. [2021-08-21 12:34:06,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1175 transitions. [2021-08-21 12:34:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:34:06,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:06,588 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:06,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:06,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:06,813 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:34:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1696600409, now seen corresponding path program 41 times [2021-08-21 12:34:06,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:06,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997598166] [2021-08-21 12:34:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:06,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:07,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:07,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997598166] [2021-08-21 12:34:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997598166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:07,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987787242] [2021-08-21 12:34:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:34:07,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:07,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:07,087 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 12:34:07,088 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 12:34:11,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:34:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:34:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:11,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12:34:12,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 128 [2021-08-21 12:34:12,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 106 [2021-08-21 12:34:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:13,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987787242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:13,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:13,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:34:13,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366402035] [2021-08-21 12:34:13,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:34:13,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:34:13,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:34:13,292 INFO L87 Difference]: Start difference. First operand 375 states and 1175 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:15,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:15,409 INFO L93 Difference]: Finished difference Result 648 states and 1885 transitions. [2021-08-21 12:34:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:34:15,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:34:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:15,411 INFO L225 Difference]: With dead ends: 648 [2021-08-21 12:34:15,411 INFO L226 Difference]: Without dead ends: 618 [2021-08-21 12:34:15,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2267.4ms TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:34:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-08-21 12:34:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 372. [2021-08-21 12:34:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.137466307277628) internal successors, (1164), 371 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1164 transitions. [2021-08-21 12:34:15,416 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1164 transitions. Word has length 20 [2021-08-21 12:34:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:15,416 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1164 transitions. [2021-08-21 12:34:15,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1164 transitions. [2021-08-21 12:34:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:34:15,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:15,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:15,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:15,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:15,646 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:34:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:15,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1719196957, now seen corresponding path program 42 times [2021-08-21 12:34:15,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:15,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394463381] [2021-08-21 12:34:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:15,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:15,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:15,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394463381] [2021-08-21 12:34:15,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394463381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:15,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843641988] [2021-08-21 12:34:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:34:15,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:15,957 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 12:34:15,958 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 12:34:20,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:34:20,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:20,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:34:20,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:20,968 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 88 [2021-08-21 12:34:22,145 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 155 [2021-08-21 12:34:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 122 [2021-08-21 12:34:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:23,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843641988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:23,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:23,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:34:23,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755248765] [2021-08-21 12:34:23,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:34:23,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:23,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:34:23,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:34:23,140 INFO L87 Difference]: Start difference. First operand 372 states and 1164 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:24,746 INFO L93 Difference]: Finished difference Result 615 states and 1813 transitions. [2021-08-21 12:34:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:34:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:34:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:24,747 INFO L225 Difference]: With dead ends: 615 [2021-08-21 12:34:24,747 INFO L226 Difference]: Without dead ends: 585 [2021-08-21 12:34:24,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1642.3ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:34:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-21 12:34:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 375. [2021-08-21 12:34:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.141711229946524) internal successors, (1175), 374 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1175 transitions. [2021-08-21 12:34:24,752 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1175 transitions. Word has length 20 [2021-08-21 12:34:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:24,752 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1175 transitions. [2021-08-21 12:34:24,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1175 transitions. [2021-08-21 12:34:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:34:24,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:24,753 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:24,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 12:34:24,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-08-21 12:34:24,957 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:34:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -82335449, now seen corresponding path program 43 times [2021-08-21 12:34:24,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:24,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593405629] [2021-08-21 12:34:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:24,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:25,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:25,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593405629] [2021-08-21 12:34:25,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593405629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:25,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206106549] [2021-08-21 12:34:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:34:25,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:25,260 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 12:34:25,261 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 12:34:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:29,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:34:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:30,746 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:30,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 104 [2021-08-21 12:34:31,241 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 164 [2021-08-21 12:34:31,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 139 [2021-08-21 12:34:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:32,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206106549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:32,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:32,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:34:32,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917638141] [2021-08-21 12:34:32,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:34:32,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:34:32,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:34:32,160 INFO L87 Difference]: Start difference. First operand 375 states and 1175 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:34,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:34,149 INFO L93 Difference]: Finished difference Result 636 states and 1869 transitions. [2021-08-21 12:34:34,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:34:34,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:34:34,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:34,151 INFO L225 Difference]: With dead ends: 636 [2021-08-21 12:34:34,151 INFO L226 Difference]: Without dead ends: 606 [2021-08-21 12:34:34,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1944.7ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:34:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-08-21 12:34:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 375. [2021-08-21 12:34:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.141711229946524) internal successors, (1175), 374 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1175 transitions. [2021-08-21 12:34:34,156 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1175 transitions. Word has length 20 [2021-08-21 12:34:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:34,156 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1175 transitions. [2021-08-21 12:34:34,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1175 transitions. [2021-08-21 12:34:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:34:34,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:34,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:34,185 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 12:34:34,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:34,385 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:34:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -59738901, now seen corresponding path program 44 times [2021-08-21 12:34:34,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:34,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032096924] [2021-08-21 12:34:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:34,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:34,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:34,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032096924] [2021-08-21 12:34:34,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032096924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:34,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47760290] [2021-08-21 12:34:34,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:34:34,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:34,709 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 12:34:34,710 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 12:34:39,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:34:39,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:34:39,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:40,191 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:40,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 102 [2021-08-21 12:34:40,757 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:40,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 173 [2021-08-21 12:34:40,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2021-08-21 12:34:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:42,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47760290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:42,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:34:42,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244621934] [2021-08-21 12:34:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:34:42,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:34:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:34:42,118 INFO L87 Difference]: Start difference. First operand 375 states and 1175 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:44,025 INFO L93 Difference]: Finished difference Result 636 states and 1857 transitions. [2021-08-21 12:34:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:34:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:34:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:44,026 INFO L225 Difference]: With dead ends: 636 [2021-08-21 12:34:44,026 INFO L226 Difference]: Without dead ends: 592 [2021-08-21 12:34:44,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1894.0ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:34:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-21 12:34:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 378. [2021-08-21 12:34:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.145888594164456) internal successors, (1186), 377 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1186 transitions. [2021-08-21 12:34:44,031 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1186 transitions. Word has length 20 [2021-08-21 12:34:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:44,031 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1186 transitions. [2021-08-21 12:34:44,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1186 transitions. [2021-08-21 12:34:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:34:44,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:44,032 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:44,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:44,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:44,253 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:34:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:44,253 INFO L82 PathProgramCache]: Analyzing trace with hash 511715905, now seen corresponding path program 45 times [2021-08-21 12:34:44,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:44,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277551784] [2021-08-21 12:34:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:44,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:44,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:44,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277551784] [2021-08-21 12:34:44,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277551784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:44,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909036435] [2021-08-21 12:34:44,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:34:44,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:44,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:44,571 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 12:34:44,571 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 12:34:49,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:34:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:34:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:50,125 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:50,125 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 115 treesize of output 102 [2021-08-21 12:34:51,201 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 151 [2021-08-21 12:34:51,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 130 [2021-08-21 12:34:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:51,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909036435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:51,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:51,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:34:51,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108341533] [2021-08-21 12:34:51,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:34:51,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:34:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:34:51,916 INFO L87 Difference]: Start difference. First operand 378 states and 1186 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:53,231 INFO L93 Difference]: Finished difference Result 572 states and 1708 transitions. [2021-08-21 12:34:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:34:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:34:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:53,232 INFO L225 Difference]: With dead ends: 572 [2021-08-21 12:34:53,232 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 12:34:53,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1316.3ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:34:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 12:34:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 375. [2021-08-21 12:34:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.141711229946524) internal successors, (1175), 374 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1175 transitions. [2021-08-21 12:34:53,238 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1175 transitions. Word has length 20 [2021-08-21 12:34:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:53,238 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1175 transitions. [2021-08-21 12:34:53,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1175 transitions. [2021-08-21 12:34:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:34:53,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:53,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:53,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 12:34:53,453 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,SelfDestructingSolverStorable196 [2021-08-21 12:34:53,453 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:34:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash -465240029, now seen corresponding path program 46 times [2021-08-21 12:34:53,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:53,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586262292] [2021-08-21 12:34:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:53,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:53,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586262292] [2021-08-21 12:34:53,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586262292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:53,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623243892] [2021-08-21 12:34:53,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:34:53,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:53,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:53,895 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 12:34:53,896 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 12:34:58,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:34:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:34:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:58,825 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:58,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 103 [2021-08-21 12:34:59,468 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:34:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 156 [2021-08-21 12:34:59,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 121 [2021-08-21 12:35:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:00,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623243892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:00,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:00,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:35:00,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084506628] [2021-08-21 12:35:00,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:35:00,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:35:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:35:00,874 INFO L87 Difference]: Start difference. First operand 375 states and 1175 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:03,942 INFO L93 Difference]: Finished difference Result 805 states and 2372 transitions. [2021-08-21 12:35:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:35:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:35:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:03,944 INFO L225 Difference]: With dead ends: 805 [2021-08-21 12:35:03,944 INFO L226 Difference]: Without dead ends: 775 [2021-08-21 12:35:03,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3066.0ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:35:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-08-21 12:35:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 379. [2021-08-21 12:35:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.1613756613756614) internal successors, (1195), 378 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1195 transitions. [2021-08-21 12:35:03,951 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1195 transitions. Word has length 20 [2021-08-21 12:35:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:03,951 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1195 transitions. [2021-08-21 12:35:03,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1195 transitions. [2021-08-21 12:35:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:35:03,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:03,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:03,982 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 12:35:04,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:04,152 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:35:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1519710791, now seen corresponding path program 47 times [2021-08-21 12:35:04,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:04,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347714930] [2021-08-21 12:35:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:04,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:04,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:04,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347714930] [2021-08-21 12:35:04,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347714930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:04,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471022334] [2021-08-21 12:35:04,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:35:04,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:04,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:04,645 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 12:35:04,645 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 12:35:09,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:35:09,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:35:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:09,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2021-08-21 12:35:10,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 149 [2021-08-21 12:35:10,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 123 [2021-08-21 12:35:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:12,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471022334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:12,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:12,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:35:12,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664831734] [2021-08-21 12:35:12,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:35:12,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:12,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:35:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:35:12,003 INFO L87 Difference]: Start difference. First operand 379 states and 1195 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:15,135 INFO L93 Difference]: Finished difference Result 766 states and 2227 transitions. [2021-08-21 12:35:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:35:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:35:15,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:15,137 INFO L225 Difference]: With dead ends: 766 [2021-08-21 12:35:15,137 INFO L226 Difference]: Without dead ends: 736 [2021-08-21 12:35:15,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3285.0ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:35:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-08-21 12:35:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 377. [2021-08-21 12:35:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.154255319148936) internal successors, (1186), 376 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1186 transitions. [2021-08-21 12:35:15,143 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1186 transitions. Word has length 20 [2021-08-21 12:35:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:15,143 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1186 transitions. [2021-08-21 12:35:15,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1186 transitions. [2021-08-21 12:35:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:35:15,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:15,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:15,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 12:35:15,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:15,345 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:35:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1653859553, now seen corresponding path program 48 times [2021-08-21 12:35:15,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:15,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123652243] [2021-08-21 12:35:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:15,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:15,651 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 12:35:15,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:15,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123652243] [2021-08-21 12:35:15,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123652243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:15,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066406427] [2021-08-21 12:35:15,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:35:15,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:15,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:15,653 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 12:35:15,653 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 12:35:20,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:35:20,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:20,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:35:20,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:21,340 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:35:21,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 106 [2021-08-21 12:35:22,087 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:35:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 155 [2021-08-21 12:35:22,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 125 [2021-08-21 12:35:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:24,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066406427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:24,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:24,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:35:24,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778053071] [2021-08-21 12:35:24,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:35:24,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:24,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:35:24,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:35:24,004 INFO L87 Difference]: Start difference. First operand 377 states and 1186 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:27,185 INFO L93 Difference]: Finished difference Result 806 states and 2306 transitions. [2021-08-21 12:35:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:35:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:35:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:27,186 INFO L225 Difference]: With dead ends: 806 [2021-08-21 12:35:27,186 INFO L226 Difference]: Without dead ends: 776 [2021-08-21 12:35:27,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3143.9ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:35:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-08-21 12:35:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 377. [2021-08-21 12:35:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.154255319148936) internal successors, (1186), 376 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1186 transitions. [2021-08-21 12:35:27,192 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1186 transitions. Word has length 20 [2021-08-21 12:35:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:27,192 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1186 transitions. [2021-08-21 12:35:27,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1186 transitions. [2021-08-21 12:35:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:35:27,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:27,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:27,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:27,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:27,393 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:35:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:27,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1680967075, now seen corresponding path program 49 times [2021-08-21 12:35:27,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:27,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512166296] [2021-08-21 12:35:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:27,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:27,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:27,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512166296] [2021-08-21 12:35:27,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512166296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:27,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901136521] [2021-08-21 12:35:27,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:35:27,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:27,748 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 12:35:27,749 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 12:35:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:35:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:33,625 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:35:33,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 106 [2021-08-21 12:35:34,332 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:35:34,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 161 [2021-08-21 12:35:34,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 129 [2021-08-21 12:35:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:36,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901136521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:36,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:36,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:35:36,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336708739] [2021-08-21 12:35:36,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:35:36,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:36,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:35:36,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:35:36,446 INFO L87 Difference]: Start difference. First operand 377 states and 1186 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:40,033 INFO L93 Difference]: Finished difference Result 927 states and 2610 transitions. [2021-08-21 12:35:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:35:40,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:35:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:40,034 INFO L225 Difference]: With dead ends: 927 [2021-08-21 12:35:40,034 INFO L226 Difference]: Without dead ends: 853 [2021-08-21 12:35:40,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3665.3ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:35:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-08-21 12:35:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 383. [2021-08-21 12:35:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.175392670157068) internal successors, (1213), 382 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1213 transitions. [2021-08-21 12:35:40,041 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1213 transitions. Word has length 20 [2021-08-21 12:35:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:40,041 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1213 transitions. [2021-08-21 12:35:40,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1213 transitions. [2021-08-21 12:35:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:35:40,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:40,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:40,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:40,252 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,SelfDestructingSolverStorable200 [2021-08-21 12:35:40,252 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:35:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash 383606787, now seen corresponding path program 50 times [2021-08-21 12:35:40,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:40,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483327586] [2021-08-21 12:35:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:40,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:40,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483327586] [2021-08-21 12:35:40,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483327586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:40,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428045946] [2021-08-21 12:35:40,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:35:40,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:40,669 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 12:35:40,670 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 12:35:46,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:35:46,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:46,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:35:46,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:46,789 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:35:46,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 106 [2021-08-21 12:35:47,731 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:35:47,732 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 178 treesize of output 157 [2021-08-21 12:35:47,735 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 151 treesize of output 127 [2021-08-21 12:35:49,400 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 12:35:49,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428045946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:49,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:49,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:35:49,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090184747] [2021-08-21 12:35:49,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:35:49,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:49,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:35:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:35:49,402 INFO L87 Difference]: Start difference. First operand 383 states and 1213 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:52,737 INFO L93 Difference]: Finished difference Result 814 states and 2400 transitions. [2021-08-21 12:35:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:35:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:35:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:52,739 INFO L225 Difference]: With dead ends: 814 [2021-08-21 12:35:52,739 INFO L226 Difference]: Without dead ends: 784 [2021-08-21 12:35:52,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3159.6ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:35:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-08-21 12:35:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 384. [2021-08-21 12:35:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.1827676240208875) internal successors, (1219), 383 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1219 transitions. [2021-08-21 12:35:52,745 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1219 transitions. Word has length 20 [2021-08-21 12:35:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:52,745 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1219 transitions. [2021-08-21 12:35:52,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1219 transitions. [2021-08-21 12:35:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:35:52,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:52,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:52,780 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 12:35:52,964 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,SelfDestructingSolverStorable201 [2021-08-21 12:35:52,965 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:35:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:52,965 INFO L82 PathProgramCache]: Analyzing trace with hash 560636147, now seen corresponding path program 51 times [2021-08-21 12:35:52,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:52,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318944943] [2021-08-21 12:35:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:52,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:53,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:53,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318944943] [2021-08-21 12:35:53,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318944943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:53,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121384748] [2021-08-21 12:35:53,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:35:53,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:53,368 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 12:35:53,370 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 12:35:58,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:35:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:58,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:35:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:59,135 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:35:59,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 106 [2021-08-21 12:36:00,599 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 166 [2021-08-21 12:36:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 139 [2021-08-21 12:36:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:01,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121384748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:01,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:36:01,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318898055] [2021-08-21 12:36:01,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:36:01,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:36:01,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:36:01,978 INFO L87 Difference]: Start difference. First operand 384 states and 1219 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:03,523 INFO L93 Difference]: Finished difference Result 681 states and 2014 transitions. [2021-08-21 12:36:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:36:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:36:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:03,524 INFO L225 Difference]: With dead ends: 681 [2021-08-21 12:36:03,524 INFO L226 Difference]: Without dead ends: 633 [2021-08-21 12:36:03,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1573.0ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:36:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-08-21 12:36:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 390. [2021-08-21 12:36:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.190231362467866) internal successors, (1241), 389 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1241 transitions. [2021-08-21 12:36:03,530 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1241 transitions. Word has length 20 [2021-08-21 12:36:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:03,530 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1241 transitions. [2021-08-21 12:36:03,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1241 transitions. [2021-08-21 12:36:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:36:03,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:03,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:03,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:03,748 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,SelfDestructingSolverStorable202 [2021-08-21 12:36:03,749 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:36:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -399504521, now seen corresponding path program 52 times [2021-08-21 12:36:03,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:03,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843139760] [2021-08-21 12:36:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:03,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:04,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:04,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843139760] [2021-08-21 12:36:04,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843139760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:04,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272049662] [2021-08-21 12:36:04,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:36:04,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:04,327 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 12:36:04,340 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 12:36:09,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:36:09,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:36:09,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:10,058 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:10,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 100 [2021-08-21 12:36:11,980 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 180 [2021-08-21 12:36:11,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 149 [2021-08-21 12:36:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272049662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:13,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:13,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:36:13,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952261035] [2021-08-21 12:36:13,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:36:13,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:36:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:36:13,463 INFO L87 Difference]: Start difference. First operand 390 states and 1241 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:16,964 INFO L93 Difference]: Finished difference Result 763 states and 2229 transitions. [2021-08-21 12:36:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:36:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:36:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:16,966 INFO L225 Difference]: With dead ends: 763 [2021-08-21 12:36:16,966 INFO L226 Difference]: Without dead ends: 689 [2021-08-21 12:36:16,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3310.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:36:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-08-21 12:36:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 402. [2021-08-21 12:36:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1895261845386536) internal successors, (1279), 401 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1279 transitions. [2021-08-21 12:36:16,972 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1279 transitions. Word has length 20 [2021-08-21 12:36:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:16,972 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1279 transitions. [2021-08-21 12:36:16,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1279 transitions. [2021-08-21 12:36:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:36:16,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:16,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:17,005 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 12:36:17,184 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,SelfDestructingSolverStorable203 [2021-08-21 12:36:17,185 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:36:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash -656629011, now seen corresponding path program 53 times [2021-08-21 12:36:17,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:17,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923196219] [2021-08-21 12:36:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:17,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:17,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:17,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923196219] [2021-08-21 12:36:17,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923196219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:17,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248155952] [2021-08-21 12:36:17,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:36:17,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:17,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:17,686 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 12:36:17,687 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 12:36:23,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:36:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:23,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:36:23,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:23,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2021-08-21 12:36:23,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 125 [2021-08-21 12:36:23,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 103 [2021-08-21 12:36:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:24,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248155952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:24,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:24,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:36:24,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100683579] [2021-08-21 12:36:24,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:36:24,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:24,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:36:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:36:24,849 INFO L87 Difference]: Start difference. First operand 402 states and 1279 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:27,424 INFO L93 Difference]: Finished difference Result 772 states and 2267 transitions. [2021-08-21 12:36:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:36:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:36:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:27,425 INFO L225 Difference]: With dead ends: 772 [2021-08-21 12:36:27,425 INFO L226 Difference]: Without dead ends: 727 [2021-08-21 12:36:27,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2751.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:36:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-08-21 12:36:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 402. [2021-08-21 12:36:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1895261845386536) internal successors, (1279), 401 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1279 transitions. [2021-08-21 12:36:27,431 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1279 transitions. Word has length 20 [2021-08-21 12:36:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:27,432 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1279 transitions. [2021-08-21 12:36:27,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1279 transitions. [2021-08-21 12:36:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:36:27,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:27,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:27,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 12:36:27,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:27,649 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:36:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:27,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1426144563, now seen corresponding path program 54 times [2021-08-21 12:36:27,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:27,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967946141] [2021-08-21 12:36:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:27,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:27,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:27,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967946141] [2021-08-21 12:36:27,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967946141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:27,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259033352] [2021-08-21 12:36:27,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:36:27,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:27,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:27,969 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 12:36:27,970 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 12:36:33,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:36:33,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:33,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:36:33,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:33,734 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:36:36,049 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:36,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 144 [2021-08-21 12:36:36,052 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 141 treesize of output 119 [2021-08-21 12:36:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:36,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259033352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:36,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:36,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:36:36,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044127595] [2021-08-21 12:36:36,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:36:36,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:36,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:36:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:36:36,821 INFO L87 Difference]: Start difference. First operand 402 states and 1279 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:38,639 INFO L93 Difference]: Finished difference Result 745 states and 2247 transitions. [2021-08-21 12:36:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:36:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:36:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:38,640 INFO L225 Difference]: With dead ends: 745 [2021-08-21 12:36:38,640 INFO L226 Difference]: Without dead ends: 730 [2021-08-21 12:36:38,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1869.0ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:36:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-21 12:36:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 406. [2021-08-21 12:36:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.197530864197531) internal successors, (1295), 405 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1295 transitions. [2021-08-21 12:36:38,646 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1295 transitions. Word has length 20 [2021-08-21 12:36:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:38,647 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1295 transitions. [2021-08-21 12:36:38,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1295 transitions. [2021-08-21 12:36:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:36:38,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:38,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:38,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:38,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:38,848 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:36:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1930670125, now seen corresponding path program 55 times [2021-08-21 12:36:38,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:38,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692382315] [2021-08-21 12:36:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:38,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:39,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:39,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692382315] [2021-08-21 12:36:39,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692382315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:39,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840018755] [2021-08-21 12:36:39,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:36:39,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:39,203 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 12:36:39,203 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 12:36:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:44,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:36:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:45,077 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:45,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 98 [2021-08-21 12:36:47,513 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:47,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:36:47,517 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 123 treesize of output 101 [2021-08-21 12:36:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:48,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840018755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:48,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:48,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:36:48,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242383206] [2021-08-21 12:36:48,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:36:48,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:36:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:36:48,076 INFO L87 Difference]: Start difference. First operand 406 states and 1295 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:49,705 INFO L93 Difference]: Finished difference Result 693 states and 2088 transitions. [2021-08-21 12:36:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:36:49,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:36:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:49,707 INFO L225 Difference]: With dead ends: 693 [2021-08-21 12:36:49,707 INFO L226 Difference]: Without dead ends: 678 [2021-08-21 12:36:49,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:36:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-21 12:36:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 411. [2021-08-21 12:36:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.204878048780488) internal successors, (1314), 410 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1314 transitions. [2021-08-21 12:36:49,713 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1314 transitions. Word has length 20 [2021-08-21 12:36:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:49,713 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1314 transitions. [2021-08-21 12:36:49,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1314 transitions. [2021-08-21 12:36:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:36:49,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:49,713 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:49,748 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 12:36:49,932 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,SelfDestructingSolverStorable206 [2021-08-21 12:36:49,933 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:36:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2044381081, now seen corresponding path program 56 times [2021-08-21 12:36:49,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:49,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983128638] [2021-08-21 12:36:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:49,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:50,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:50,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983128638] [2021-08-21 12:36:50,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983128638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:50,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382473242] [2021-08-21 12:36:50,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:36:50,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:50,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:50,272 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 12:36:50,273 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 12:36:56,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:36:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:56,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:36:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:56,412 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:56,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 90 [2021-08-21 12:36:57,954 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:36:57,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 138 [2021-08-21 12:36:57,957 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 132 treesize of output 110 [2021-08-21 12:36:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:58,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382473242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:58,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:58,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:36:58,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627254770] [2021-08-21 12:36:58,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:36:58,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:36:58,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:36:58,855 INFO L87 Difference]: Start difference. First operand 411 states and 1314 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:02,211 INFO L93 Difference]: Finished difference Result 965 states and 2817 transitions. [2021-08-21 12:37:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:37:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:37:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:02,213 INFO L225 Difference]: With dead ends: 965 [2021-08-21 12:37:02,213 INFO L226 Difference]: Without dead ends: 935 [2021-08-21 12:37:02,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3112.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:37:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-08-21 12:37:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 416. [2021-08-21 12:37:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.216867469879518) internal successors, (1335), 415 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1335 transitions. [2021-08-21 12:37:02,220 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1335 transitions. Word has length 20 [2021-08-21 12:37:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:02,220 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1335 transitions. [2021-08-21 12:37:02,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1335 transitions. [2021-08-21 12:37:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:37:02,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:02,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:02,256 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 12:37:02,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:02,445 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:37:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash -59430261, now seen corresponding path program 57 times [2021-08-21 12:37:02,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:02,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664102484] [2021-08-21 12:37:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:02,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:02,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664102484] [2021-08-21 12:37:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664102484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:02,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428639032] [2021-08-21 12:37:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:37:02,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:02,703 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 12:37:02,704 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 12:37:08,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:37:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:37:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:08,816 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 90 [2021-08-21 12:37:10,240 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:10,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 139 [2021-08-21 12:37:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 111 [2021-08-21 12:37:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:11,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428639032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:11,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:11,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:37:11,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939003349] [2021-08-21 12:37:11,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:11,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:11,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:11,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:11,102 INFO L87 Difference]: Start difference. First operand 416 states and 1335 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:12,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:12,817 INFO L93 Difference]: Finished difference Result 719 states and 2170 transitions. [2021-08-21 12:37:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:37:12,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:37:12,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:12,818 INFO L225 Difference]: With dead ends: 719 [2021-08-21 12:37:12,818 INFO L226 Difference]: Without dead ends: 704 [2021-08-21 12:37:12,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1616.4ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:37:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-08-21 12:37:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 412. [2021-08-21 12:37:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.2092457420924574) internal successors, (1319), 411 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1319 transitions. [2021-08-21 12:37:12,840 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1319 transitions. Word has length 20 [2021-08-21 12:37:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:12,840 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1319 transitions. [2021-08-21 12:37:12,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1319 transitions. [2021-08-21 12:37:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:37:12,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:12,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:12,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:13,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:13,065 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:37:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:13,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1228206391, now seen corresponding path program 58 times [2021-08-21 12:37:13,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:13,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127038659] [2021-08-21 12:37:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:13,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:13,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:13,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127038659] [2021-08-21 12:37:13,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127038659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:13,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278242164] [2021-08-21 12:37:13,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:37:13,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:13,316 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 12:37:13,318 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 12:37:18,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:37:18,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:18,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:37:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:19,192 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:19,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:37:21,234 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:21,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 134 [2021-08-21 12:37:21,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 109 [2021-08-21 12:37:21,794 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 12:37:21,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278242164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:21,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:21,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:37:21,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122797997] [2021-08-21 12:37:21,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:21,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:21,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:21,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:21,795 INFO L87 Difference]: Start difference. First operand 412 states and 1319 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:24,459 INFO L93 Difference]: Finished difference Result 1013 states and 2933 transitions. [2021-08-21 12:37:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:37:24,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:37:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:24,461 INFO L225 Difference]: With dead ends: 1013 [2021-08-21 12:37:24,461 INFO L226 Difference]: Without dead ends: 983 [2021-08-21 12:37:24,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2564.9ms TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:37:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-08-21 12:37:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 418. [2021-08-21 12:37:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.2158273381294964) internal successors, (1341), 417 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1341 transitions. [2021-08-21 12:37:24,468 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1341 transitions. Word has length 20 [2021-08-21 12:37:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:24,469 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1341 transitions. [2021-08-21 12:37:24,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1341 transitions. [2021-08-21 12:37:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:37:24,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:24,469 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:24,505 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 12:37:24,684 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,SelfDestructingSolverStorable209 [2021-08-21 12:37:24,685 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:37:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1378762825, now seen corresponding path program 59 times [2021-08-21 12:37:24,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:24,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718473300] [2021-08-21 12:37:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:24,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:25,082 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 12:37:25,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:25,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718473300] [2021-08-21 12:37:25,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718473300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:25,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394184720] [2021-08-21 12:37:25,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:37:25,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:25,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:25,083 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 12:37:25,085 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 12:37:30,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:37:30,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:37:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:30,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2021-08-21 12:37:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 130 [2021-08-21 12:37:31,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 110 [2021-08-21 12:37:32,794 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 12:37:32,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394184720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:32,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:32,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:37:32,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374617805] [2021-08-21 12:37:32,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:37:32,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:37:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:37:32,795 INFO L87 Difference]: Start difference. First operand 418 states and 1341 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:34,998 INFO L93 Difference]: Finished difference Result 781 states and 2332 transitions. [2021-08-21 12:37:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:37:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:37:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:34,999 INFO L225 Difference]: With dead ends: 781 [2021-08-21 12:37:34,999 INFO L226 Difference]: Without dead ends: 766 [2021-08-21 12:37:35,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2508.2ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:37:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-21 12:37:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 415. [2021-08-21 12:37:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.21256038647343) internal successors, (1330), 414 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1330 transitions. [2021-08-21 12:37:35,007 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1330 transitions. Word has length 20 [2021-08-21 12:37:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:35,007 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1330 transitions. [2021-08-21 12:37:35,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1330 transitions. [2021-08-21 12:37:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:37:35,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:35,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:35,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:35,232 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,SelfDestructingSolverStorable210 [2021-08-21 12:37:35,233 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:37:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1401359373, now seen corresponding path program 60 times [2021-08-21 12:37:35,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:35,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542540973] [2021-08-21 12:37:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:35,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:35,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:35,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542540973] [2021-08-21 12:37:35,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542540973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:35,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418204316] [2021-08-21 12:37:35,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:37:35,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:35,637 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 12:37:35,638 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 12:37:41,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:37:41,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:41,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:37:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:42,234 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:42,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 93 [2021-08-21 12:37:43,876 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:43,877 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 165 treesize of output 148 [2021-08-21 12:37:43,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2021-08-21 12:37:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:44,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418204316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:44,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:44,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:37:44,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391997668] [2021-08-21 12:37:44,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:44,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:44,997 INFO L87 Difference]: Start difference. First operand 415 states and 1330 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:47,061 INFO L93 Difference]: Finished difference Result 751 states and 2265 transitions. [2021-08-21 12:37:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:37:47,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:37:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:47,063 INFO L225 Difference]: With dead ends: 751 [2021-08-21 12:37:47,063 INFO L226 Difference]: Without dead ends: 729 [2021-08-21 12:37:47,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2099.5ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:37:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-08-21 12:37:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 412. [2021-08-21 12:37:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.2092457420924574) internal successors, (1319), 411 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1319 transitions. [2021-08-21 12:37:47,069 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1319 transitions. Word has length 20 [2021-08-21 12:37:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:47,069 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1319 transitions. [2021-08-21 12:37:47,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1319 transitions. [2021-08-21 12:37:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:37:47,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:47,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:47,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:47,270 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,SelfDestructingSolverStorable211 [2021-08-21 12:37:47,270 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:37:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1950681239, now seen corresponding path program 61 times [2021-08-21 12:37:47,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:47,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145934733] [2021-08-21 12:37:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:47,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:47,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:47,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145934733] [2021-08-21 12:37:47,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145934733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:47,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148523279] [2021-08-21 12:37:47,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:37:47,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:47,644 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 12:37:47,645 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 12:37:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:53,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:37:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:54,185 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:54,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 98 [2021-08-21 12:37:56,287 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:37:56,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:37:56,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 105 [2021-08-21 12:37:56,833 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 12:37:56,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148523279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:56,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:56,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:37:56,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201706367] [2021-08-21 12:37:56,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:56,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:56,834 INFO L87 Difference]: Start difference. First operand 412 states and 1319 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:59,625 INFO L93 Difference]: Finished difference Result 857 states and 2539 transitions. [2021-08-21 12:37:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:37:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:37:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:59,627 INFO L225 Difference]: With dead ends: 857 [2021-08-21 12:37:59,627 INFO L226 Difference]: Without dead ends: 827 [2021-08-21 12:37:59,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2625.6ms TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:37:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-21 12:37:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 407. [2021-08-21 12:37:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.2019704433497536) internal successors, (1300), 406 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1300 transitions. [2021-08-21 12:37:59,634 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1300 transitions. Word has length 20 [2021-08-21 12:37:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:59,634 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1300 transitions. [2021-08-21 12:37:59,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1300 transitions. [2021-08-21 12:37:59,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:37:59,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:59,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:59,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:59,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 12:37:59,845 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:37:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash -143180819, now seen corresponding path program 62 times [2021-08-21 12:37:59,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:59,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395318043] [2021-08-21 12:37:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:59,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:00,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:00,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395318043] [2021-08-21 12:38:00,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395318043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:00,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294798799] [2021-08-21 12:38:00,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:38:00,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:00,275 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 12:38:00,276 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 12:38:06,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:38:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:38:06,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:06,946 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:06,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:38:09,388 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:09,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 143 [2021-08-21 12:38:09,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12:38:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:09,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294798799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:09,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:09,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:38:09,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724495983] [2021-08-21 12:38:09,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:38:09,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:38:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:38:09,883 INFO L87 Difference]: Start difference. First operand 407 states and 1300 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:11,264 INFO L93 Difference]: Finished difference Result 693 states and 2093 transitions. [2021-08-21 12:38:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:38:11,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:38:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:11,266 INFO L225 Difference]: With dead ends: 693 [2021-08-21 12:38:11,266 INFO L226 Difference]: Without dead ends: 678 [2021-08-21 12:38:11,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1414.1ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:38:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-21 12:38:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 410. [2021-08-21 12:38:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.2053789731051343) internal successors, (1311), 409 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1311 transitions. [2021-08-21 12:38:11,272 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1311 transitions. Word has length 20 [2021-08-21 12:38:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:11,272 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1311 transitions. [2021-08-21 12:38:11,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1311 transitions. [2021-08-21 12:38:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:38:11,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:11,273 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:11,314 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 12:38:11,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:11,495 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:38:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1757238697, now seen corresponding path program 63 times [2021-08-21 12:38:11,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:11,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761139654] [2021-08-21 12:38:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:11,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:11,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:11,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761139654] [2021-08-21 12:38:11,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761139654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:11,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041470087] [2021-08-21 12:38:11,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:38:11,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:11,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:11,893 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 12:38:11,894 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 12:38:18,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:38:18,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:18,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:38:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:18,658 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:18,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 95 [2021-08-21 12:38:20,522 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:20,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 144 [2021-08-21 12:38:20,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2021-08-21 12:38:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:21,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041470087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:21,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:21,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:38:21,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964656766] [2021-08-21 12:38:21,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:38:21,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:21,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:38:21,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:38:21,732 INFO L87 Difference]: Start difference. First operand 410 states and 1311 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:24,973 INFO L93 Difference]: Finished difference Result 812 states and 2450 transitions. [2021-08-21 12:38:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:38:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:38:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:24,974 INFO L225 Difference]: With dead ends: 812 [2021-08-21 12:38:24,975 INFO L226 Difference]: Without dead ends: 770 [2021-08-21 12:38:24,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3089.2ms TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:38:24,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-08-21 12:38:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 415. [2021-08-21 12:38:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.217391304347826) internal successors, (1332), 414 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1332 transitions. [2021-08-21 12:38:24,980 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1332 transitions. Word has length 20 [2021-08-21 12:38:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:24,980 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1332 transitions. [2021-08-21 12:38:24,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1332 transitions. [2021-08-21 12:38:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:38:24,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:24,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:25,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:38:25,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:25,198 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:38:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2130312615, now seen corresponding path program 64 times [2021-08-21 12:38:25,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:25,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690022843] [2021-08-21 12:38:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:25,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:25,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:25,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690022843] [2021-08-21 12:38:25,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690022843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:25,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440693337] [2021-08-21 12:38:25,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:38:25,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:25,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:25,436 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 12:38:25,437 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 12:38:31,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:38:31,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:38:31,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:31,839 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:31,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 93 [2021-08-21 12:38:32,655 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:32,655 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 158 treesize of output 139 [2021-08-21 12:38:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 106 [2021-08-21 12:38:33,912 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 12:38:33,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440693337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:33,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:33,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:38:33,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963468462] [2021-08-21 12:38:33,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:38:33,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:38:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:38:33,913 INFO L87 Difference]: Start difference. First operand 415 states and 1332 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:37,645 INFO L93 Difference]: Finished difference Result 1032 states and 2976 transitions. [2021-08-21 12:38:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:38:37,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:38:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:37,647 INFO L225 Difference]: With dead ends: 1032 [2021-08-21 12:38:37,647 INFO L226 Difference]: Without dead ends: 1002 [2021-08-21 12:38:37,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3585.1ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:38:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-08-21 12:38:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 418. [2021-08-21 12:38:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.2302158273381294) internal successors, (1347), 417 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1347 transitions. [2021-08-21 12:38:37,656 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1347 transitions. Word has length 20 [2021-08-21 12:38:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:37,656 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1347 transitions. [2021-08-21 12:38:37,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1347 transitions. [2021-08-21 12:38:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:38:37,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:37,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:37,691 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 12:38:37,876 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,SelfDestructingSolverStorable215 [2021-08-21 12:38:37,876 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:38:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash -179703861, now seen corresponding path program 65 times [2021-08-21 12:38:37,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:37,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154298270] [2021-08-21 12:38:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:37,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:38,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:38,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154298270] [2021-08-21 12:38:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154298270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:38,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450075707] [2021-08-21 12:38:38,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:38:38,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:38,188 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 12:38:38,189 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 12:38:44,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:38:44,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:38:44,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:44,985 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 97 treesize of output 79 [2021-08-21 12:38:45,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12:38:45,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 106 [2021-08-21 12:38:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:46,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450075707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:46,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:46,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:38:46,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976609643] [2021-08-21 12:38:46,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:38:46,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:38:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:38:46,799 INFO L87 Difference]: Start difference. First operand 418 states and 1347 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:38:48,881 INFO L93 Difference]: Finished difference Result 768 states and 2295 transitions. [2021-08-21 12:38:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:38:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:38:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:38:48,882 INFO L225 Difference]: With dead ends: 768 [2021-08-21 12:38:48,882 INFO L226 Difference]: Without dead ends: 753 [2021-08-21 12:38:48,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2226.1ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:38:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-08-21 12:38:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 416. [2021-08-21 12:38:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.2240963855421687) internal successors, (1338), 415 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1338 transitions. [2021-08-21 12:38:48,889 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1338 transitions. Word has length 20 [2021-08-21 12:38:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:38:48,889 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1338 transitions. [2021-08-21 12:38:48,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:38:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1338 transitions. [2021-08-21 12:38:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:38:48,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:38:48,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:38:48,925 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 12:38:49,108 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,SelfDestructingSolverStorable216 [2021-08-21 12:38:49,109 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:38:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:38:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash 941693091, now seen corresponding path program 66 times [2021-08-21 12:38:49,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:38:49,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912463442] [2021-08-21 12:38:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:38:49,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:38:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:38:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:49,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:38:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912463442] [2021-08-21 12:38:49,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912463442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:49,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979336380] [2021-08-21 12:38:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:38:49,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:38:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:38:49,467 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 12:38:49,468 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 12:38:56,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 12:38:56,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:38:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:38:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:38:56,784 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:56,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:38:57,530 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:38:57,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 141 [2021-08-21 12:38:57,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 110 [2021-08-21 12:38:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:38:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979336380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:38:59,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:38:59,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:38:59,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36412162] [2021-08-21 12:38:59,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:38:59,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:38:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:38:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:38:59,153 INFO L87 Difference]: Start difference. First operand 416 states and 1338 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:00,975 INFO L93 Difference]: Finished difference Result 775 states and 2311 transitions. [2021-08-21 12:39:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:39:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:39:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:00,976 INFO L225 Difference]: With dead ends: 775 [2021-08-21 12:39:00,976 INFO L226 Difference]: Without dead ends: 760 [2021-08-21 12:39:00,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1886.4ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:39:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-08-21 12:39:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 416. [2021-08-21 12:39:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.2240963855421687) internal successors, (1338), 415 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1338 transitions. [2021-08-21 12:39:00,983 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1338 transitions. Word has length 20 [2021-08-21 12:39:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:00,983 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1338 transitions. [2021-08-21 12:39:00,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1338 transitions. [2021-08-21 12:39:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:39:00,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:00,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:01,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:01,195 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,SelfDestructingSolverStorable217 [2021-08-21 12:39:01,195 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:39:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash -18447577, now seen corresponding path program 67 times [2021-08-21 12:39:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:01,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053555094] [2021-08-21 12:39:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:01,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:01,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:01,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053555094] [2021-08-21 12:39:01,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053555094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:01,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848702334] [2021-08-21 12:39:01,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:39:01,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:01,487 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 12:39:01,488 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 12:39:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:08,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:39:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:09,040 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 90 [2021-08-21 12:39:09,877 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:09,877 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 161 treesize of output 144 [2021-08-21 12:39:09,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 118 [2021-08-21 12:39:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:11,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848702334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:11,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:11,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:39:11,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800507763] [2021-08-21 12:39:11,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:39:11,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:39:11,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:39:11,868 INFO L87 Difference]: Start difference. First operand 416 states and 1338 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:15,027 INFO L93 Difference]: Finished difference Result 987 states and 2862 transitions. [2021-08-21 12:39:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:39:15,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:39:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:15,028 INFO L225 Difference]: With dead ends: 987 [2021-08-21 12:39:15,029 INFO L226 Difference]: Without dead ends: 943 [2021-08-21 12:39:15,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3127.1ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:39:15,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-21 12:39:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 415. [2021-08-21 12:39:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.217391304347826) internal successors, (1332), 414 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1332 transitions. [2021-08-21 12:39:15,035 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1332 transitions. Word has length 20 [2021-08-21 12:39:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:15,035 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1332 transitions. [2021-08-21 12:39:15,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1332 transitions. [2021-08-21 12:39:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:39:15,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:15,036 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:15,072 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 12:39:15,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:15,249 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:39:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1315807865, now seen corresponding path program 68 times [2021-08-21 12:39:15,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:15,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493551823] [2021-08-21 12:39:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:15,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:15,497 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 12:39:15,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:15,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493551823] [2021-08-21 12:39:15,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493551823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:15,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772549444] [2021-08-21 12:39:15,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:39:15,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:15,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:15,498 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 12:39:15,499 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 12:39:22,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:39:22,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:22,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:39:22,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:22,912 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 92 [2021-08-21 12:39:24,090 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:24,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 167 [2021-08-21 12:39:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2021-08-21 12:39:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:25,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772549444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:25,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:25,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:39:25,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815279576] [2021-08-21 12:39:25,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:39:25,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:39:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:39:25,407 INFO L87 Difference]: Start difference. First operand 415 states and 1332 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:27,819 INFO L93 Difference]: Finished difference Result 774 states and 2300 transitions. [2021-08-21 12:39:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:39:27,819 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:39:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:27,821 INFO L225 Difference]: With dead ends: 774 [2021-08-21 12:39:27,821 INFO L226 Difference]: Without dead ends: 759 [2021-08-21 12:39:27,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2412.0ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:39:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-08-21 12:39:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 416. [2021-08-21 12:39:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.2240963855421687) internal successors, (1338), 415 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1338 transitions. [2021-08-21 12:39:27,827 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1338 transitions. Word has length 20 [2021-08-21 12:39:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:27,827 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1338 transitions. [2021-08-21 12:39:27,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1338 transitions. [2021-08-21 12:39:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:39:27,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:27,827 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:27,866 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 12:39:28,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:28,028 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:39:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:28,028 INFO L82 PathProgramCache]: Analyzing trace with hash 31322891, now seen corresponding path program 69 times [2021-08-21 12:39:28,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:28,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123144302] [2021-08-21 12:39:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:28,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:28,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:28,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123144302] [2021-08-21 12:39:28,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123144302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:28,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014289448] [2021-08-21 12:39:28,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:39:28,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:28,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:28,371 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 12:39:28,371 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 12:39:35,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:39:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 12:39:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:35,604 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:35,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:39:36,444 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 150 [2021-08-21 12:39:36,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 122 [2021-08-21 12:39:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:37,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014289448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:37,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:37,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:39:37,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955754104] [2021-08-21 12:39:37,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:39:37,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:37,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:39:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:39:37,895 INFO L87 Difference]: Start difference. First operand 416 states and 1338 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:42,172 INFO L93 Difference]: Finished difference Result 1038 states and 3004 transitions. [2021-08-21 12:39:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:39:42,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:39:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:42,174 INFO L225 Difference]: With dead ends: 1038 [2021-08-21 12:39:42,174 INFO L226 Difference]: Without dead ends: 979 [2021-08-21 12:39:42,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4090.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:39:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-08-21 12:39:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 417. [2021-08-21 12:39:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.230769230769231) internal successors, (1344), 416 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1344 transitions. [2021-08-21 12:39:42,181 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1344 transitions. Word has length 20 [2021-08-21 12:39:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:42,181 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1344 transitions. [2021-08-21 12:39:42,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1344 transitions. [2021-08-21 12:39:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:39:42,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:42,182 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:42,218 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 12:39:42,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:42,396 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:39:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash 893349789, now seen corresponding path program 70 times [2021-08-21 12:39:42,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:42,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794901006] [2021-08-21 12:39:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:42,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:42,703 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 12:39:42,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:42,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794901006] [2021-08-21 12:39:42,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794901006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:42,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375668635] [2021-08-21 12:39:42,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:39:42,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:42,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:42,704 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 12:39:42,705 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 12:39:49,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:39:49,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:39:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:39:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:39:50,420 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:50,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 104 [2021-08-21 12:39:51,990 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:39:51,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 144 [2021-08-21 12:39:51,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 121 [2021-08-21 12:39:52,805 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 12:39:52,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375668635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:52,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:39:52,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:39:52,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667190188] [2021-08-21 12:39:52,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:39:52,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:39:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:39:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:39:52,806 INFO L87 Difference]: Start difference. First operand 417 states and 1344 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:39:54,022 INFO L93 Difference]: Finished difference Result 703 states and 2145 transitions. [2021-08-21 12:39:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:39:54,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:39:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:39:54,024 INFO L225 Difference]: With dead ends: 703 [2021-08-21 12:39:54,024 INFO L226 Difference]: Without dead ends: 688 [2021-08-21 12:39:54,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1207.1ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:39:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-21 12:39:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 423. [2021-08-21 12:39:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.2298578199052135) internal successors, (1363), 422 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1363 transitions. [2021-08-21 12:39:54,030 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1363 transitions. Word has length 20 [2021-08-21 12:39:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:39:54,030 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1363 transitions. [2021-08-21 12:39:54,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:39:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1363 transitions. [2021-08-21 12:39:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:39:54,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:39:54,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:39:54,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 12:39:54,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:54,231 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:39:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:39:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash -794648291, now seen corresponding path program 71 times [2021-08-21 12:39:54,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:39:54,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143461316] [2021-08-21 12:39:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:39:54,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:39:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:39:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:39:54,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:39:54,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143461316] [2021-08-21 12:39:54,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143461316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:39:54,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199946357] [2021-08-21 12:39:54,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:39:54,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:39:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:39:54,714 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 12:39:54,715 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 12:40:01,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:40:01,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:01,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:40:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:02,144 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 90 treesize of output 76 [2021-08-21 12:40:02,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 129 [2021-08-21 12:40:02,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2021-08-21 12:40:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:03,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199946357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:03,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:03,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:40:03,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259836453] [2021-08-21 12:40:03,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:40:03,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:40:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:40:03,624 INFO L87 Difference]: Start difference. First operand 423 states and 1363 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:07,050 INFO L93 Difference]: Finished difference Result 853 states and 2490 transitions. [2021-08-21 12:40:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:40:07,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:40:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:07,051 INFO L225 Difference]: With dead ends: 853 [2021-08-21 12:40:07,051 INFO L226 Difference]: Without dead ends: 823 [2021-08-21 12:40:07,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3589.4ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:40:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-08-21 12:40:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 423. [2021-08-21 12:40:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.2298578199052135) internal successors, (1363), 422 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1363 transitions. [2021-08-21 12:40:07,058 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1363 transitions. Word has length 20 [2021-08-21 12:40:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:07,058 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1363 transitions. [2021-08-21 12:40:07,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1363 transitions. [2021-08-21 12:40:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:40:07,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:07,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:07,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:07,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 12:40:07,259 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:40:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash -772051743, now seen corresponding path program 72 times [2021-08-21 12:40:07,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:07,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756064224] [2021-08-21 12:40:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:07,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:07,585 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 12:40:07,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756064224] [2021-08-21 12:40:07,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756064224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745625893] [2021-08-21 12:40:07,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:40:07,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:07,586 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 12:40:07,587 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 12:40:14,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:40:14,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:40:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:15,458 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:15,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-21 12:40:16,754 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:16,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 12:40:16,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 112 [2021-08-21 12:40:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:17,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745625893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:17,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:17,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:40:17,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008193211] [2021-08-21 12:40:17,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:40:17,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:40:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:40:17,791 INFO L87 Difference]: Start difference. First operand 423 states and 1363 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:20,425 INFO L93 Difference]: Finished difference Result 860 states and 2515 transitions. [2021-08-21 12:40:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:40:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:40:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:20,427 INFO L225 Difference]: With dead ends: 860 [2021-08-21 12:40:20,427 INFO L226 Difference]: Without dead ends: 801 [2021-08-21 12:40:20,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2559.2ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:40:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-08-21 12:40:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 426. [2021-08-21 12:40:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.232941176470588) internal successors, (1374), 425 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1374 transitions. [2021-08-21 12:40:20,434 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1374 transitions. Word has length 20 [2021-08-21 12:40:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:20,434 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1374 transitions. [2021-08-21 12:40:20,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1374 transitions. [2021-08-21 12:40:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:40:20,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:20,434 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:20,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:20,644 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,SelfDestructingSolverStorable223 [2021-08-21 12:40:20,645 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:40:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1901240915, now seen corresponding path program 73 times [2021-08-21 12:40:20,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:20,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437577174] [2021-08-21 12:40:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:20,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:21,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:21,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437577174] [2021-08-21 12:40:21,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437577174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:21,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367156826] [2021-08-21 12:40:21,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:40:21,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:21,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:21,061 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 12:40:21,062 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 12:40:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:29,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:40:29,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:30,093 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:30,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 94 [2021-08-21 12:40:31,059 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 137 [2021-08-21 12:40:31,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2021-08-21 12:40:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:31,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367156826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:31,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:31,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:40:31,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33483301] [2021-08-21 12:40:31,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:40:31,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:31,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:40:31,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:40:31,571 INFO L87 Difference]: Start difference. First operand 426 states and 1374 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:32,684 INFO L93 Difference]: Finished difference Result 636 states and 1965 transitions. [2021-08-21 12:40:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:40:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:40:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:32,686 INFO L225 Difference]: With dead ends: 636 [2021-08-21 12:40:32,686 INFO L226 Difference]: Without dead ends: 621 [2021-08-21 12:40:32,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1146.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:40:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-21 12:40:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 429. [2021-08-21 12:40:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2289719626168223) internal successors, (1382), 428 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1382 transitions. [2021-08-21 12:40:32,691 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1382 transitions. Word has length 20 [2021-08-21 12:40:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:32,691 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1382 transitions. [2021-08-21 12:40:32,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1382 transitions. [2021-08-21 12:40:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:40:32,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:32,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:32,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 12:40:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 12:40:32,893 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:40:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 399261225, now seen corresponding path program 74 times [2021-08-21 12:40:32,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:32,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924066170] [2021-08-21 12:40:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:32,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:33,335 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 12:40:33,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:33,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924066170] [2021-08-21 12:40:33,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924066170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:33,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775643938] [2021-08-21 12:40:33,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:40:33,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:33,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:33,337 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 12:40:33,337 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 12:40:41,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:40:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:40:41,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:42,098 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:42,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 92 [2021-08-21 12:40:42,697 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:42,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 145 [2021-08-21 12:40:42,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 122 [2021-08-21 12:40:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:44,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775643938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:44,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:44,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:40:44,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974010302] [2021-08-21 12:40:44,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:40:44,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:44,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:40:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:40:44,154 INFO L87 Difference]: Start difference. First operand 429 states and 1382 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:45,550 INFO L93 Difference]: Finished difference Result 666 states and 2026 transitions. [2021-08-21 12:40:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:40:45,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:40:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:45,553 INFO L225 Difference]: With dead ends: 666 [2021-08-21 12:40:45,553 INFO L226 Difference]: Without dead ends: 651 [2021-08-21 12:40:45,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1430.4ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:40:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-08-21 12:40:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 429. [2021-08-21 12:40:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2289719626168223) internal successors, (1382), 428 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1382 transitions. [2021-08-21 12:40:45,561 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1382 transitions. Word has length 20 [2021-08-21 12:40:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:45,562 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1382 transitions. [2021-08-21 12:40:45,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1382 transitions. [2021-08-21 12:40:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:40:45,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:45,563 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:45,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:45,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:45,777 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:40:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 421857773, now seen corresponding path program 75 times [2021-08-21 12:40:45,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:45,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733919572] [2021-08-21 12:40:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:45,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:46,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:46,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733919572] [2021-08-21 12:40:46,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733919572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:46,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32963289] [2021-08-21 12:40:46,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:40:46,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:46,248 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 12:40:46,249 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 12:40:53,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:40:53,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:40:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:40:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:40:54,917 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:54,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 102 [2021-08-21 12:40:55,448 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:40:55,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 154 [2021-08-21 12:40:55,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 127 [2021-08-21 12:40:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:56,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32963289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:56,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:40:56,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:40:56,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044835751] [2021-08-21 12:40:56,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:40:56,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:40:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:40:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:40:56,595 INFO L87 Difference]: Start difference. First operand 429 states and 1382 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:40:58,843 INFO L93 Difference]: Finished difference Result 736 states and 2193 transitions. [2021-08-21 12:40:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:40:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:40:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:40:58,844 INFO L225 Difference]: With dead ends: 736 [2021-08-21 12:40:58,844 INFO L226 Difference]: Without dead ends: 677 [2021-08-21 12:40:58,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2387.1ms TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:40:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-08-21 12:40:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 429. [2021-08-21 12:40:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2289719626168223) internal successors, (1382), 428 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1382 transitions. [2021-08-21 12:40:58,850 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1382 transitions. Word has length 20 [2021-08-21 12:40:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:40:58,850 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1382 transitions. [2021-08-21 12:40:58,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:40:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1382 transitions. [2021-08-21 12:40:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:40:58,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:40:58,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:40:58,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 12:40:59,064 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,SelfDestructingSolverStorable226 [2021-08-21 12:40:59,065 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:40:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:40:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1749535311, now seen corresponding path program 76 times [2021-08-21 12:40:59,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:40:59,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803828555] [2021-08-21 12:40:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:40:59,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:40:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:40:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:40:59,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:40:59,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803828555] [2021-08-21 12:40:59,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803828555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:40:59,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949828261] [2021-08-21 12:40:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:40:59,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:40:59,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:40:59,339 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 12:40:59,340 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 12:41:06,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:41:06,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:06,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:41:06,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:07,465 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:41:07,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 109 [2021-08-21 12:41:08,312 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:41:08,313 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 200 treesize of output 175 [2021-08-21 12:41:08,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 144 [2021-08-21 12:41:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:09,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949828261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:09,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:09,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:41:09,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439423297] [2021-08-21 12:41:09,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:41:09,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:41:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:41:09,402 INFO L87 Difference]: Start difference. First operand 429 states and 1382 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:11,657 INFO L93 Difference]: Finished difference Result 755 states and 2245 transitions. [2021-08-21 12:41:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:41:11,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:41:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:11,659 INFO L225 Difference]: With dead ends: 755 [2021-08-21 12:41:11,659 INFO L226 Difference]: Without dead ends: 683 [2021-08-21 12:41:11,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2302.0ms TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:41:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-21 12:41:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 429. [2021-08-21 12:41:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2289719626168223) internal successors, (1382), 428 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1382 transitions. [2021-08-21 12:41:11,665 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1382 transitions. Word has length 20 [2021-08-21 12:41:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:11,665 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1382 transitions. [2021-08-21 12:41:11,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1382 transitions. [2021-08-21 12:41:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:41:11,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:11,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:11,703 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 12:41:11,866 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,SelfDestructingSolverStorable227 [2021-08-21 12:41:11,866 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:41:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash -465591913, now seen corresponding path program 77 times [2021-08-21 12:41:11,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:11,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157125010] [2021-08-21 12:41:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:11,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:12,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:12,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157125010] [2021-08-21 12:41:12,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157125010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:12,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409973474] [2021-08-21 12:41:12,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:41:12,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:12,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:12,220 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 12:41:12,221 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 12:41:19,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:41:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:41:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:19,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 12:41:20,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 127 [2021-08-21 12:41:20,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 103 [2021-08-21 12:41:21,417 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 12:41:21,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409973474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:21,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:21,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 12:41:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358317665] [2021-08-21 12:41:21,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:41:21,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:41:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:41:21,418 INFO L87 Difference]: Start difference. First operand 429 states and 1382 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:24,252 INFO L93 Difference]: Finished difference Result 695 states and 2123 transitions. [2021-08-21 12:41:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:41:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:41:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:24,254 INFO L225 Difference]: With dead ends: 695 [2021-08-21 12:41:24,254 INFO L226 Difference]: Without dead ends: 665 [2021-08-21 12:41:24,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2915.8ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:41:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-08-21 12:41:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 433. [2021-08-21 12:41:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.236111111111111) internal successors, (1398), 432 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1398 transitions. [2021-08-21 12:41:24,259 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1398 transitions. Word has length 20 [2021-08-21 12:41:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:24,260 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1398 transitions. [2021-08-21 12:41:24,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1398 transitions. [2021-08-21 12:41:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:41:24,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:24,260 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:24,300 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 12:41:24,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:24,463 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:41:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash -145675823, now seen corresponding path program 78 times [2021-08-21 12:41:24,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:24,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371783702] [2021-08-21 12:41:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:24,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:24,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:24,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371783702] [2021-08-21 12:41:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371783702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:24,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965801288] [2021-08-21 12:41:24,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:41:24,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:24,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:24,886 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 12:41:24,887 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 12:41:32,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:41:32,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:41:32,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:41:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:33,149 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:41:33,149 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 103 treesize of output 90 [2021-08-21 12:41:34,580 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:41:34,581 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 158 treesize of output 141 [2021-08-21 12:41:34,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 115 [2021-08-21 12:41:35,534 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 12:41:35,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965801288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:35,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:35,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:41:35,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063486226] [2021-08-21 12:41:35,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:41:35,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:35,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:41:35,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:41:35,535 INFO L87 Difference]: Start difference. First operand 433 states and 1398 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:37,660 INFO L93 Difference]: Finished difference Result 820 states and 2420 transitions. [2021-08-21 12:41:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:41:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:41:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:37,662 INFO L225 Difference]: With dead ends: 820 [2021-08-21 12:41:37,662 INFO L226 Difference]: Without dead ends: 790 [2021-08-21 12:41:37,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2080.6ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-08-21 12:41:37,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 435. [2021-08-21 12:41:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.2419354838709675) internal successors, (1407), 434 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1407 transitions. [2021-08-21 12:41:37,674 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1407 transitions. Word has length 20 [2021-08-21 12:41:37,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:37,674 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1407 transitions. [2021-08-21 12:41:37,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1407 transitions. [2021-08-21 12:41:37,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:41:37,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:37,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:37,715 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 12:41:37,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:37,888 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:41:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:37,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1839274997, now seen corresponding path program 79 times [2021-08-21 12:41:37,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:37,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065798853] [2021-08-21 12:41:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:37,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:38,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:38,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065798853] [2021-08-21 12:41:38,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065798853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:38,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416556824] [2021-08-21 12:41:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:41:38,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:38,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:38,251 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 12:41:38,301 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 12:41:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:41:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:41:46,945 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:41:46,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 90 [2021-08-21 12:41:48,220 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:41:48,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 130 [2021-08-21 12:41:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-08-21 12:41:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:49,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416556824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:49,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:41:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:41:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071567177] [2021-08-21 12:41:49,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:41:49,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:41:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:41:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:41:49,197 INFO L87 Difference]: Start difference. First operand 435 states and 1407 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:41:51,412 INFO L93 Difference]: Finished difference Result 764 states and 2294 transitions. [2021-08-21 12:41:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:41:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:41:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:41:51,414 INFO L225 Difference]: With dead ends: 764 [2021-08-21 12:41:51,414 INFO L226 Difference]: Without dead ends: 734 [2021-08-21 12:41:51,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2072.1ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:41:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-08-21 12:41:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 431. [2021-08-21 12:41:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.2348837209302324) internal successors, (1391), 430 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1391 transitions. [2021-08-21 12:41:51,420 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1391 transitions. Word has length 20 [2021-08-21 12:41:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:41:51,421 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1391 transitions. [2021-08-21 12:41:51,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:41:51,421 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1391 transitions. [2021-08-21 12:41:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:41:51,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:41:51,421 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:41:51,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 12:41:51,641 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,SelfDestructingSolverStorable230 [2021-08-21 12:41:51,641 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:41:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:41:51,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1341908507, now seen corresponding path program 80 times [2021-08-21 12:41:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:41:51,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695575066] [2021-08-21 12:41:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:41:51,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:41:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:41:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:41:52,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:41:52,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695575066] [2021-08-21 12:41:52,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695575066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:41:52,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741281128] [2021-08-21 12:41:52,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:41:52,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:41:52,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:41:52,029 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 12:41:52,029 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 12:42:00,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:42:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:42:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:42:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:42:01,058 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:42:01,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 90 [2021-08-21 12:42:03,616 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 12:42:03,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 143 [2021-08-21 12:42:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 116 [2021-08-21 12:42:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:42:04,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741281128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:04,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:42:04,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:42:04,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025072195] [2021-08-21 12:42:04,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:42:04,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:42:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:42:04,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:42:04,300 INFO L87 Difference]: Start difference. First operand 431 states and 1391 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:42:05,447 INFO L93 Difference]: Finished difference Result 659 states and 2033 transitions. [2021-08-21 12:42:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:42:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:42:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:42:05,449 INFO L225 Difference]: With dead ends: 659 [2021-08-21 12:42:05,449 INFO L226 Difference]: Without dead ends: 644 [2021-08-21 12:42:05,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1184.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:42:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-08-21 12:42:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 431. [2021-08-21 12:42:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.2348837209302324) internal successors, (1391), 430 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1391 transitions. [2021-08-21 12:42:05,457 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1391 transitions. Word has length 20 [2021-08-21 12:42:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:42:05,457 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1391 transitions. [2021-08-21 12:42:05,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:42:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1391 transitions. [2021-08-21 12:42:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:42:05,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:42:05,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:42:05,506 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 12:42:05,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:05,683 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:42:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:42:05,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1052639273, now seen corresponding path program 81 times [2021-08-21 12:42:05,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:42:05,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655380994] [2021-08-21 12:42:05,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:42:05,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:42:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:42:05,921 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 12:42:05,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:42:05,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655380994] [2021-08-21 12:42:05,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655380994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:42:05,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506879201] [2021-08-21 12:42:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:42:05,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:42:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:42:05,922 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 12:42:05,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:42:07,828 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 12:42:07,828 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:42:08,848 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:42:08,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 12:42:09,029 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-21 12:42:09,049 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,SelfDestructingSolverStorable232 [2021-08-21 12:42:09,049 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 1,while executing Executor. [2021-08-21 12:42:09,051 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:42:09,051 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:42:09,051 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 12:42:09,054 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:42:09,054 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:42:09,055 INFO L202 PluginConnector]: Adding new model word-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:42:09 BasicIcfg [2021-08-21 12:42:09,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:42:09,056 INFO L168 Benchmark]: Toolchain (without parser) took 862435.18 ms. Allocated memory was 172.0 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 152.7 MB in the beginning and 961.9 MB in the end (delta: -809.1 MB). Peak memory consumption was 2.1 GB. Max. memory is 8.0 GB. [2021-08-21 12:42:09,056 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 172.0 MB. Free memory was 154.2 MB in the beginning and 154.1 MB in the end (delta: 131.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:42:09,056 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.29 ms. Allocated memory is still 172.0 MB. Free memory was 152.7 MB in the beginning and 151.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:42:09,056 INFO L168 Benchmark]: Boogie Preprocessor took 12.64 ms. Allocated memory is still 172.0 MB. Free memory was 151.1 MB in the beginning and 150.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 12:42:09,056 INFO L168 Benchmark]: RCFGBuilder took 284.36 ms. Allocated memory is still 172.0 MB. Free memory was 150.0 MB in the beginning and 125.3 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:42:09,056 INFO L168 Benchmark]: TraceAbstraction took 862108.19 ms. Allocated memory was 172.0 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 124.7 MB in the beginning and 961.9 MB in the end (delta: -837.1 MB). Peak memory consumption was 2.0 GB. Max. memory is 8.0 GB. [2021-08-21 12:42:09,076 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 0.09 ms. Allocated memory is still 172.0 MB. Free memory was 154.2 MB in the beginning and 154.1 MB in the end (delta: 131.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.29 ms. Allocated memory is still 172.0 MB. Free memory was 152.7 MB in the beginning and 151.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.64 ms. Allocated memory is still 172.0 MB. Free memory was 151.1 MB in the beginning and 150.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.36 ms. Allocated memory is still 172.0 MB. Free memory was 150.0 MB in the beginning and 125.3 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 862108.19 ms. Allocated memory was 172.0 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 124.7 MB in the beginning and 961.9 MB in the end (delta: -837.1 MB). Peak memory consumption was 2.0 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: 128]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 122]: 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 21 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 121]: 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 21 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 118]: 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 21 with TraceHistMax 1,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 862046.8ms, OverallIterations: 233, TraceHistogramMax: 1, EmptinessCheckTime: 127.7ms, AutomataDifference: 216385.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12649 SDtfs, 24081 SDslu, 73415 SDs, 0 SdLazy, 63618 SolverSat, 3143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38156.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5569 GetRequests, 1738 SyntacticMatches, 81 SemanticMatches, 3750 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7652 ImplicationChecksByTransitivity, 212662.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=230, InterpolantAutomatonStates: 2309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1168.1ms AutomataMinimizationTime, 232 MinimizatonAttempts, 49607 StatesRemovedByMinimization, 231 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 569.2ms SsaConstructionTime, 2420.1ms SatisfiabilityAnalysisTime, 268073.7ms InterpolantComputationTime, 6292 NumberOfCodeBlocks, 6292 NumberOfCodeBlocksAsserted, 434 NumberOfCheckSat, 5950 ConstructedInterpolants, 443 QuantifiedInterpolants, 137455 SizeOfPredicates, 1187 NumberOfNonLiveVariables, 8430 ConjunctsInSsa, 2115 ConjunctsInUnsatCore, 342 InterpolantComputations, 122 PerfectInterpolantSequences, 0/540 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 [2021-08-21 12:42:09,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137