/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:59:49,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:59:49,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:59:49,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 17:59:49,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:59:49,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:59:49,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:59:49,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:59:49,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:59:49,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:59:49,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:59:49,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:59:49,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:59:49,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:59:49,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:59:49,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:59:49,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 17:59:49,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:59:49,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:59:49,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:59:49,280 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-Delay.epf [2021-08-21 17:59:49,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:59:49,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:59:49,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:59:49,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:59:49,297 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:59:49,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:59:49,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:59:49,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:59:49,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:59:49,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:59:49,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:59:49,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:59:49,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:59:49,299 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:59:49,299 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:59:49,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:59:49,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:59:49,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:59:49,573 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:59:49,574 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:59:49,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-08-21 17:59:49,575 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-08-21 17:59:49,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:59:49,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:59:49,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:59:49,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:59:49,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:59:49,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:59:49,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:59:49,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:59:49,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:59:49,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:59:49,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:59:49,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:59:49,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:59:49,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/1) ... [2021-08-21 17:59:49,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:59:49,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:49,667 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 17:59:49,685 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 17:59:49,699 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:59:49,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:59:49,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:59:49,700 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:59:49,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:59:49,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:59:49,700 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:59:49,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:59:49,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:59:49,701 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 17:59:49,820 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:59:49,820 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 17:59:49,821 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 17:59:49,822 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:59:49 BoogieIcfgContainer [2021-08-21 17:59:49,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:59:49,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:59:49,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:59:49,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:59:49,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:59:49" (1/2) ... [2021-08-21 17:59:49,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636c95ab and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:59:49, skipping insertion in model container [2021-08-21 17:59:49,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:59:49" (2/2) ... [2021-08-21 17:59:49,827 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-08-21 17:59:49,830 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:59:49,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:59:49,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:59:49,830 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:59:49,867 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:59:49,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:59:49,925 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 17:59:49,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:59:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:59:49,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:49,980 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:49,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:49,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1693748667, now seen corresponding path program 1 times [2021-08-21 17:59:49,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:49,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865896642] [2021-08-21 17:59:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:49,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:50,164 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 17:59:50,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:50,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865896642] [2021-08-21 17:59:50,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865896642] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:59:50,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:59:50,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:59:50,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666979843] [2021-08-21 17:59:50,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:59:50,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:59:50,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:59:50,179 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:50,202 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2021-08-21 17:59:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:59:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:59:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:50,209 INFO L225 Difference]: With dead ends: 54 [2021-08-21 17:59:50,209 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:59:50,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:59:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:59:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-08-21 17:59:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2021-08-21 17:59:50,238 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 11 [2021-08-21 17:59:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:50,238 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2021-08-21 17:59:50,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2021-08-21 17:59:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:59:50,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:50,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:50,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:59:50,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:50,243 INFO L82 PathProgramCache]: Analyzing trace with hash 573813990, now seen corresponding path program 1 times [2021-08-21 17:59:50,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:50,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197770767] [2021-08-21 17:59:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:50,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:50,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:50,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197770767] [2021-08-21 17:59:50,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197770767] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:59:50,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:59:50,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:59:50,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663574600] [2021-08-21 17:59:50,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:59:50,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:59:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:59:50,300 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:50,311 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2021-08-21 17:59:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:59:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 17:59:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:50,312 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:59:50,312 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:59:50,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:59:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:59:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-21 17:59:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 40 transitions. [2021-08-21 17:59:50,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 40 transitions. Word has length 13 [2021-08-21 17:59:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:50,316 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 40 transitions. [2021-08-21 17:59:50,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 40 transitions. [2021-08-21 17:59:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:59:50,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:50,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:50,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:59:50,317 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:50,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:50,318 INFO L82 PathProgramCache]: Analyzing trace with hash 609695206, now seen corresponding path program 1 times [2021-08-21 17:59:50,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:50,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476074265] [2021-08-21 17:59:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:50,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:50,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:50,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476074265] [2021-08-21 17:59:50,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476074265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:50,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653330569] [2021-08-21 17:59:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:50,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:50,453 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 17:59:50,455 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 17:59:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:59:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:50,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 17:59:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:50,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653330569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:50,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:50,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:59:50,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560745531] [2021-08-21 17:59:50,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:59:50,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:50,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:59:50,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:59:50,743 INFO L87 Difference]: Start difference. First operand 27 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:59:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:50,803 INFO L93 Difference]: Finished difference Result 52 states and 80 transitions. [2021-08-21 17:59:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:59:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:59:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:50,809 INFO L225 Difference]: With dead ends: 52 [2021-08-21 17:59:50,810 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 17:59:50,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:59:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 17:59:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-08-21 17:59:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 54 transitions. [2021-08-21 17:59:50,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 54 transitions. Word has length 16 [2021-08-21 17:59:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:50,813 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 54 transitions. [2021-08-21 17:59:50,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:59:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 54 transitions. [2021-08-21 17:59:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:59:50,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:50,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:50,832 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 17:59:51,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:51,015 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:51,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1383769658, now seen corresponding path program 1 times [2021-08-21 17:59:51,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:51,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782676120] [2021-08-21 17:59:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:51,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:51,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:51,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782676120] [2021-08-21 17:59:51,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782676120] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:59:51,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:59:51,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:59:51,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547038525] [2021-08-21 17:59:51,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:59:51,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:59:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:59:51,043 INFO L87 Difference]: Start difference. First operand 35 states and 54 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 17:59:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:51,054 INFO L93 Difference]: Finished difference Result 41 states and 65 transitions. [2021-08-21 17:59:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:59:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 17:59:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:51,056 INFO L225 Difference]: With dead ends: 41 [2021-08-21 17:59:51,056 INFO L226 Difference]: Without dead ends: 41 [2021-08-21 17:59:51,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:59:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-21 17:59:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-08-21 17:59:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 53 transitions. [2021-08-21 17:59:51,060 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 53 transitions. Word has length 16 [2021-08-21 17:59:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:51,060 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 53 transitions. [2021-08-21 17:59:51,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 17:59:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 53 transitions. [2021-08-21 17:59:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:59:51,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:51,061 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:51,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:59:51,061 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2019748793, now seen corresponding path program 2 times [2021-08-21 17:59:51,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:51,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124140197] [2021-08-21 17:59:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:51,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:51,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:51,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124140197] [2021-08-21 17:59:51,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124140197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:59:51,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:59:51,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:59:51,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396317642] [2021-08-21 17:59:51,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:59:51,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:59:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:59:51,103 INFO L87 Difference]: Start difference. First operand 35 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:51,119 INFO L93 Difference]: Finished difference Result 90 states and 137 transitions. [2021-08-21 17:59:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:59:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 17:59:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:51,122 INFO L225 Difference]: With dead ends: 90 [2021-08-21 17:59:51,122 INFO L226 Difference]: Without dead ends: 90 [2021-08-21 17:59:51,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:59:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-21 17:59:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-08-21 17:59:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 61 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 107 transitions. [2021-08-21 17:59:51,139 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 107 transitions. Word has length 18 [2021-08-21 17:59:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:51,140 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 107 transitions. [2021-08-21 17:59:51,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 107 transitions. [2021-08-21 17:59:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:59:51,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:51,141 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:51,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 17:59:51,141 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:51,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2052485403, now seen corresponding path program 3 times [2021-08-21 17:59:51,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:51,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716587030] [2021-08-21 17:59:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:51,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:51,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:51,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716587030] [2021-08-21 17:59:51,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716587030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:51,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156110506] [2021-08-21 17:59:51,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:51,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:51,188 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 17:59:51,191 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 17:59:51,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:59:51,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:51,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 17:59:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:51,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156110506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:51,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:51,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 17:59:51,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82534983] [2021-08-21 17:59:51,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:59:51,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:59:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:59:51,305 INFO L87 Difference]: Start difference. First operand 62 states and 107 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:51,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:51,315 INFO L93 Difference]: Finished difference Result 85 states and 137 transitions. [2021-08-21 17:59:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:59:51,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:59:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:51,317 INFO L225 Difference]: With dead ends: 85 [2021-08-21 17:59:51,317 INFO L226 Difference]: Without dead ends: 85 [2021-08-21 17:59:51,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:59:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-21 17:59:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-08-21 17:59:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6835443037974684) internal successors, (133), 79 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 133 transitions. [2021-08-21 17:59:51,331 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 133 transitions. Word has length 21 [2021-08-21 17:59:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:51,331 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 133 transitions. [2021-08-21 17:59:51,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 133 transitions. [2021-08-21 17:59:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:59:51,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:51,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:51,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:51,544 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,SelfDestructingSolverStorable5 [2021-08-21 17:59:51,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 249017029, now seen corresponding path program 1 times [2021-08-21 17:59:51,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:51,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370617072] [2021-08-21 17:59:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:51,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:51,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:51,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370617072] [2021-08-21 17:59:51,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370617072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:51,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133927943] [2021-08-21 17:59:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:51,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:51,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:51,694 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 17:59:51,694 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 17:59:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:59:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:52,071 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 17:59:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-08-21 17:59:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:52,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133927943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:52,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:52,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 17:59:52,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710469709] [2021-08-21 17:59:52,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:59:52,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:59:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:59:52,122 INFO L87 Difference]: Start difference. First operand 80 states and 133 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:52,175 INFO L93 Difference]: Finished difference Result 131 states and 221 transitions. [2021-08-21 17:59:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:59:52,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:59:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:52,176 INFO L225 Difference]: With dead ends: 131 [2021-08-21 17:59:52,177 INFO L226 Difference]: Without dead ends: 122 [2021-08-21 17:59:52,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:59:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-21 17:59:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-08-21 17:59:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.6813186813186813) internal successors, (153), 91 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 153 transitions. [2021-08-21 17:59:52,179 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 153 transitions. Word has length 21 [2021-08-21 17:59:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:52,179 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 153 transitions. [2021-08-21 17:59:52,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 153 transitions. [2021-08-21 17:59:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:59:52,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:52,180 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:52,198 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 17:59:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:52,396 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash -899358851, now seen corresponding path program 2 times [2021-08-21 17:59:52,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:52,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840958179] [2021-08-21 17:59:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:52,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:52,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:52,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840958179] [2021-08-21 17:59:52,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840958179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:52,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990099635] [2021-08-21 17:59:52,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:59:52,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:52,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:52,529 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 17:59:52,550 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 17:59:52,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:52,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:59:52,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:52,919 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 17:59:52,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-08-21 17:59:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:52,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990099635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:52,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:52,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 17:59:52,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295642928] [2021-08-21 17:59:52,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:59:52,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:59:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:59:52,961 INFO L87 Difference]: Start difference. First operand 92 states and 153 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:53,074 INFO L93 Difference]: Finished difference Result 159 states and 267 transitions. [2021-08-21 17:59:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:59:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:59:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:53,075 INFO L225 Difference]: With dead ends: 159 [2021-08-21 17:59:53,076 INFO L226 Difference]: Without dead ends: 150 [2021-08-21 17:59:53,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:59:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-21 17:59:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 96. [2021-08-21 17:59:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 95 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2021-08-21 17:59:53,083 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 21 [2021-08-21 17:59:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:53,083 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2021-08-21 17:59:53,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2021-08-21 17:59:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:59:53,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:53,085 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:53,103 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 17:59:53,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:53,297 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2058805031, now seen corresponding path program 3 times [2021-08-21 17:59:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:53,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095228037] [2021-08-21 17:59:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:53,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:53,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095228037] [2021-08-21 17:59:53,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095228037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631684095] [2021-08-21 17:59:53,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:53,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:53,434 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 17:59:53,435 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 17:59:53,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:59:53,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 17:59:53,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:53,761 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 17:59:53,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-08-21 17:59:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:53,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631684095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:53,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:53,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 17:59:53,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022251260] [2021-08-21 17:59:53,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:59:53,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:59:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:53,799 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:53,856 INFO L93 Difference]: Finished difference Result 142 states and 234 transitions. [2021-08-21 17:59:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:59:53,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:59:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:53,858 INFO L225 Difference]: With dead ends: 142 [2021-08-21 17:59:53,858 INFO L226 Difference]: Without dead ends: 133 [2021-08-21 17:59:53,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-21 17:59:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2021-08-21 17:59:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.6732673267326732) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 169 transitions. [2021-08-21 17:59:53,863 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 169 transitions. Word has length 21 [2021-08-21 17:59:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:53,863 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 169 transitions. [2021-08-21 17:59:53,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 169 transitions. [2021-08-21 17:59:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:59:53,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:53,865 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:53,882 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 17:59:54,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:54,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash -994610872, now seen corresponding path program 4 times [2021-08-21 17:59:54,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:54,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661228452] [2021-08-21 17:59:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:54,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:54,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:54,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661228452] [2021-08-21 17:59:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661228452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:54,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087107738] [2021-08-21 17:59:54,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:54,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:54,129 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 17:59:54,134 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 17:59:54,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:59:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:54,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087107738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:54,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:54,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 17:59:54,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640760913] [2021-08-21 17:59:54,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:59:54,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:59:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:59:54,344 INFO L87 Difference]: Start difference. First operand 102 states and 169 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 17:59:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:54,367 INFO L93 Difference]: Finished difference Result 205 states and 327 transitions. [2021-08-21 17:59:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:59:54,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 23 [2021-08-21 17:59:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:54,368 INFO L225 Difference]: With dead ends: 205 [2021-08-21 17:59:54,369 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 17:59:54,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:59:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 17:59:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2021-08-21 17:59:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.703125) internal successors, (218), 128 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 218 transitions. [2021-08-21 17:59:54,372 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 218 transitions. Word has length 23 [2021-08-21 17:59:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:54,372 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 218 transitions. [2021-08-21 17:59:54,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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 17:59:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 218 transitions. [2021-08-21 17:59:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:59:54,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:54,373 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:54,390 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 17:59:54,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:54,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1084179814, now seen corresponding path program 5 times [2021-08-21 17:59:54,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:54,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585523936] [2021-08-21 17:59:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:54,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:59:54,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:54,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585523936] [2021-08-21 17:59:54,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585523936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:54,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414209876] [2021-08-21 17:59:54,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:54,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:54,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:54,807 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 17:59:54,828 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 17:59:54,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:59:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:54,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:59:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:55,390 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 17:59:55,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 17:59:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:55,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414209876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:55,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:55,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-21 17:59:55,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567176021] [2021-08-21 17:59:55,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:59:55,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:59:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:59:55,438 INFO L87 Difference]: Start difference. First operand 129 states and 218 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:55,575 INFO L93 Difference]: Finished difference Result 253 states and 418 transitions. [2021-08-21 17:59:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:59:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:59:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:55,576 INFO L225 Difference]: With dead ends: 253 [2021-08-21 17:59:55,576 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 17:59:55,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:59:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 17:59:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 161. [2021-08-21 17:59:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.7) internal successors, (272), 160 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 272 transitions. [2021-08-21 17:59:55,580 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 272 transitions. Word has length 26 [2021-08-21 17:59:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:55,580 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 272 transitions. [2021-08-21 17:59:55,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 272 transitions. [2021-08-21 17:59:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:59:55,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:55,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:55,599 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 17:59:55,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:55,797 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:55,797 INFO L82 PathProgramCache]: Analyzing trace with hash -389792290, now seen corresponding path program 6 times [2021-08-21 17:59:55,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:55,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321000514] [2021-08-21 17:59:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:55,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:55,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:55,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321000514] [2021-08-21 17:59:55,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321000514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:55,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518177406] [2021-08-21 17:59:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:55,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:55,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:55,997 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 17:59:56,007 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 17:59:56,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:59:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:56,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:59:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:56,666 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 17:59:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 17:59:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:56,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518177406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:56,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:56,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 17:59:56,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022700602] [2021-08-21 17:59:56,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:59:56,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:59:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:59:56,711 INFO L87 Difference]: Start difference. First operand 161 states and 272 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:56,868 INFO L93 Difference]: Finished difference Result 287 states and 490 transitions. [2021-08-21 17:59:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:59:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:59:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:56,869 INFO L225 Difference]: With dead ends: 287 [2021-08-21 17:59:56,869 INFO L226 Difference]: Without dead ends: 269 [2021-08-21 17:59:56,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:59:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-21 17:59:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 172. [2021-08-21 17:59:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.6900584795321638) internal successors, (289), 171 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 289 transitions. [2021-08-21 17:59:56,872 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 289 transitions. Word has length 26 [2021-08-21 17:59:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:56,873 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 289 transitions. [2021-08-21 17:59:56,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 289 transitions. [2021-08-21 17:59:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:59:56,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:56,873 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:56,892 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 17:59:57,084 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,SelfDestructingSolverStorable11 [2021-08-21 17:59:57,085 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1064823240, now seen corresponding path program 7 times [2021-08-21 17:59:57,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:57,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195836930] [2021-08-21 17:59:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:57,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:57,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:57,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195836930] [2021-08-21 17:59:57,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195836930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:57,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005278623] [2021-08-21 17:59:57,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:59:57,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:57,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:57,268 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 17:59:57,292 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 17:59:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:57,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:59:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:57,949 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 17:59:57,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 17:59:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:57,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005278623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:57,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:57,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 17:59:57,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255432422] [2021-08-21 17:59:57,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:59:57,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:59:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:59:57,983 INFO L87 Difference]: Start difference. First operand 172 states and 289 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:58,125 INFO L93 Difference]: Finished difference Result 289 states and 489 transitions. [2021-08-21 17:59:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:59:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:59:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:58,127 INFO L225 Difference]: With dead ends: 289 [2021-08-21 17:59:58,127 INFO L226 Difference]: Without dead ends: 280 [2021-08-21 17:59:58,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:59:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-21 17:59:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 175. [2021-08-21 17:59:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.6896551724137931) internal successors, (294), 174 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 294 transitions. [2021-08-21 17:59:58,133 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 294 transitions. Word has length 26 [2021-08-21 17:59:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:58,133 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 294 transitions. [2021-08-21 17:59:58,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 294 transitions. [2021-08-21 17:59:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:59:58,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:58,134 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:58,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:58,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 17:59:58,345 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 74009518, now seen corresponding path program 8 times [2021-08-21 17:59:58,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:58,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601255383] [2021-08-21 17:59:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:58,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:59:58,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:58,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601255383] [2021-08-21 17:59:58,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601255383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:58,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188410572] [2021-08-21 17:59:58,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:59:58,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:58,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:58,523 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 17:59:58,524 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 17:59:58,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:58,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:58,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:59:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:59,272 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 17:59:59,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 17:59:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188410572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:59,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:59,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-21 17:59:59,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952128625] [2021-08-21 17:59:59,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:59:59,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:59:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:59:59,308 INFO L87 Difference]: Start difference. First operand 175 states and 294 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:59,511 INFO L93 Difference]: Finished difference Result 415 states and 681 transitions. [2021-08-21 17:59:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:59:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:59:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:59,513 INFO L225 Difference]: With dead ends: 415 [2021-08-21 17:59:59,513 INFO L226 Difference]: Without dead ends: 346 [2021-08-21 17:59:59,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:59:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-21 17:59:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 198. [2021-08-21 17:59:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.6903553299492386) internal successors, (333), 197 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 333 transitions. [2021-08-21 17:59:59,519 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 333 transitions. Word has length 26 [2021-08-21 17:59:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:59,519 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 333 transitions. [2021-08-21 17:59:59,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 333 transitions. [2021-08-21 17:59:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:59:59,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:59,520 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:59,539 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 17:59:59,736 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,SelfDestructingSolverStorable13 [2021-08-21 17:59:59,737 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1399962586, now seen corresponding path program 9 times [2021-08-21 17:59:59,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:59,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915612099] [2021-08-21 17:59:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:59,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:59,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:59,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915612099] [2021-08-21 17:59:59,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915612099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:59,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165746454] [2021-08-21 17:59:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:59,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:59,923 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 17:59:59,923 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 18:00:00,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:00,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:00,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:00:00,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:00,913 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-08-21 18:00:00,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 51 [2021-08-21 18:00:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:00,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165746454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:00,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:00,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 18:00:00,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51758117] [2021-08-21 18:00:00,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:00:00,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:00:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:00:00,952 INFO L87 Difference]: Start difference. First operand 198 states and 333 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:01,253 INFO L93 Difference]: Finished difference Result 459 states and 760 transitions. [2021-08-21 18:00:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:00:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:01,255 INFO L225 Difference]: With dead ends: 459 [2021-08-21 18:00:01,255 INFO L226 Difference]: Without dead ends: 405 [2021-08-21 18:00:01,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-21 18:00:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 189. [2021-08-21 18:00:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.702127659574468) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 320 transitions. [2021-08-21 18:00:01,266 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 320 transitions. Word has length 26 [2021-08-21 18:00:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:01,267 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 320 transitions. [2021-08-21 18:00:01,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 320 transitions. [2021-08-21 18:00:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:00:01,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:01,267 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:01,286 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 18:00:01,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:00:01,473 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash 54652944, now seen corresponding path program 10 times [2021-08-21 18:00:01,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:01,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648570661] [2021-08-21 18:00:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:01,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:01,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:01,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648570661] [2021-08-21 18:00:01,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648570661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:01,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773642655] [2021-08-21 18:00:01,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:01,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:01,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:01,691 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 18:00:01,692 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 18:00:02,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:02,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:00:02,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:02,581 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 18:00:02,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 18:00:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:02,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773642655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:02,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:02,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 18:00:02,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239037061] [2021-08-21 18:00:02,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:00:02,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:00:02,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:00:02,616 INFO L87 Difference]: Start difference. First operand 189 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:02,808 INFO L93 Difference]: Finished difference Result 368 states and 624 transitions. [2021-08-21 18:00:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:00:02,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:02,810 INFO L225 Difference]: With dead ends: 368 [2021-08-21 18:00:02,810 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 18:00:02,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 18:00:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 189. [2021-08-21 18:00:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.702127659574468) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 320 transitions. [2021-08-21 18:00:02,814 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 320 transitions. Word has length 26 [2021-08-21 18:00:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:02,814 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 320 transitions. [2021-08-21 18:00:02,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 320 transitions. [2021-08-21 18:00:02,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:00:02,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:02,815 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:02,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-21 18:00:03,031 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,SelfDestructingSolverStorable15 [2021-08-21 18:00:03,032 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash 906668680, now seen corresponding path program 11 times [2021-08-21 18:00:03,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:03,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763765407] [2021-08-21 18:00:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:03,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:03,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:03,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763765407] [2021-08-21 18:00:03,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763765407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:03,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571156641] [2021-08-21 18:00:03,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:03,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:03,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:03,228 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 18:00:03,229 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 18:00:03,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:00:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:03,638 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:00:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:04,185 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-21 18:00:04,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-21 18:00:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:04,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571156641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:04,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:04,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 18:00:04,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071686677] [2021-08-21 18:00:04,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:00:04,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:00:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:00:04,227 INFO L87 Difference]: Start difference. First operand 189 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:04,390 INFO L93 Difference]: Finished difference Result 322 states and 550 transitions. [2021-08-21 18:00:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:00:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:04,392 INFO L225 Difference]: With dead ends: 322 [2021-08-21 18:00:04,392 INFO L226 Difference]: Without dead ends: 313 [2021-08-21 18:00:04,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-21 18:00:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 198. [2021-08-21 18:00:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.700507614213198) internal successors, (335), 197 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 335 transitions. [2021-08-21 18:00:04,396 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 335 transitions. Word has length 26 [2021-08-21 18:00:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:04,396 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 335 transitions. [2021-08-21 18:00:04,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 335 transitions. [2021-08-21 18:00:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:00:04,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:04,397 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:04,448 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 18:00:04,597 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,SelfDestructingSolverStorable16 [2021-08-21 18:00:04,598 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:04,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:04,598 INFO L82 PathProgramCache]: Analyzing trace with hash 613844548, now seen corresponding path program 12 times [2021-08-21 18:00:04,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:04,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328518723] [2021-08-21 18:00:04,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:04,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:00:04,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:04,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328518723] [2021-08-21 18:00:04,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328518723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:04,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254462276] [2021-08-21 18:00:04,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:04,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:04,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:04,820 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 18:00:04,820 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 18:00:05,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:00:05,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:05,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:00:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:05,821 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:00:05,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-21 18:00:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254462276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:05,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:05,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-08-21 18:00:05,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168345529] [2021-08-21 18:00:05,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:00:05,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:05,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:00:05,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:00:05,868 INFO L87 Difference]: Start difference. First operand 198 states and 335 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:06,076 INFO L93 Difference]: Finished difference Result 467 states and 759 transitions. [2021-08-21 18:00:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:00:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:06,078 INFO L225 Difference]: With dead ends: 467 [2021-08-21 18:00:06,078 INFO L226 Difference]: Without dead ends: 386 [2021-08-21 18:00:06,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 305.6ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:00:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-21 18:00:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 236. [2021-08-21 18:00:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.6978723404255318) internal successors, (399), 235 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 399 transitions. [2021-08-21 18:00:06,082 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 399 transitions. Word has length 26 [2021-08-21 18:00:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:06,083 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 399 transitions. [2021-08-21 18:00:06,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 399 transitions. [2021-08-21 18:00:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:00:06,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:06,083 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:06,106 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 18:00:06,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:06,284 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:06,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:06,284 INFO L82 PathProgramCache]: Analyzing trace with hash -860127556, now seen corresponding path program 13 times [2021-08-21 18:00:06,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:06,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013903019] [2021-08-21 18:00:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:06,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:06,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:06,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013903019] [2021-08-21 18:00:06,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013903019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:06,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157686651] [2021-08-21 18:00:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:06,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:06,508 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 18:00:06,509 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 18:00:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:07,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:00:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:07,501 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:00:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-21 18:00:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:07,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157686651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:07,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:07,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 18:00:07,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899676336] [2021-08-21 18:00:07,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:00:07,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:00:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:00:07,538 INFO L87 Difference]: Start difference. First operand 236 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:07,743 INFO L93 Difference]: Finished difference Result 496 states and 846 transitions. [2021-08-21 18:00:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:07,745 INFO L225 Difference]: With dead ends: 496 [2021-08-21 18:00:07,745 INFO L226 Difference]: Without dead ends: 469 [2021-08-21 18:00:07,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:07,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-21 18:00:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 233. [2021-08-21 18:00:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.6982758620689655) internal successors, (394), 232 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 394 transitions. [2021-08-21 18:00:07,751 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 394 transitions. Word has length 26 [2021-08-21 18:00:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:07,751 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 394 transitions. [2021-08-21 18:00:07,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 394 transitions. [2021-08-21 18:00:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:00:07,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:07,751 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:07,774 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 18:00:07,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:07,968 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 594487974, now seen corresponding path program 14 times [2021-08-21 18:00:07,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:07,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803559148] [2021-08-21 18:00:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:07,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:08,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:08,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803559148] [2021-08-21 18:00:08,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803559148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:08,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6263889] [2021-08-21 18:00:08,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:08,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:08,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:08,196 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 18:00:08,197 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 18:00:08,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:08,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:08,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:00:08,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:09,126 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:00:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-21 18:00:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:09,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6263889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:09,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:09,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 18:00:09,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207274270] [2021-08-21 18:00:09,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:00:09,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:00:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:00:09,169 INFO L87 Difference]: Start difference. First operand 233 states and 394 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:09,440 INFO L93 Difference]: Finished difference Result 424 states and 718 transitions. [2021-08-21 18:00:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:09,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:09,442 INFO L225 Difference]: With dead ends: 424 [2021-08-21 18:00:09,442 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 18:00:09,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 18:00:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 232. [2021-08-21 18:00:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.7012987012987013) internal successors, (393), 231 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 393 transitions. [2021-08-21 18:00:09,446 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 393 transitions. Word has length 26 [2021-08-21 18:00:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:09,447 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 393 transitions. [2021-08-21 18:00:09,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 393 transitions. [2021-08-21 18:00:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:00:09,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:09,447 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:09,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:09,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:09,667 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1446503710, now seen corresponding path program 15 times [2021-08-21 18:00:09,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:09,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060604776] [2021-08-21 18:00:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:09,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:09,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:09,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060604776] [2021-08-21 18:00:09,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060604776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:09,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131425514] [2021-08-21 18:00:09,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:09,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:09,924 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 18:00:09,925 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 18:00:10,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:10,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:00:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:11,022 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 18:00:11,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-21 18:00:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:11,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131425514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:11,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:11,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-21 18:00:11,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67102264] [2021-08-21 18:00:11,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:00:11,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:00:11,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:00:11,071 INFO L87 Difference]: Start difference. First operand 232 states and 393 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:11,295 INFO L93 Difference]: Finished difference Result 411 states and 699 transitions. [2021-08-21 18:00:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:11,297 INFO L225 Difference]: With dead ends: 411 [2021-08-21 18:00:11,297 INFO L226 Difference]: Without dead ends: 402 [2021-08-21 18:00:11,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:00:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-21 18:00:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 217. [2021-08-21 18:00:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.6944444444444444) internal successors, (366), 216 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 366 transitions. [2021-08-21 18:00:11,301 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 366 transitions. Word has length 26 [2021-08-21 18:00:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:11,301 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 366 transitions. [2021-08-21 18:00:11,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 366 transitions. [2021-08-21 18:00:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:00:11,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:11,302 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:11,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:11,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:11,520 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:11,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash -827310456, now seen corresponding path program 16 times [2021-08-21 18:00:11,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:11,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351670433] [2021-08-21 18:00:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:11,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:11,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:11,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351670433] [2021-08-21 18:00:11,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351670433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:11,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979432962] [2021-08-21 18:00:11,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:11,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:11,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:11,713 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 18:00:11,713 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 18:00:12,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:12,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:12,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:00:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:12,698 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-21 18:00:12,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-08-21 18:00:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:12,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979432962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:12,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:12,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-21 18:00:12,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978975150] [2021-08-21 18:00:12,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:00:12,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:12,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:00:12,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:00:12,735 INFO L87 Difference]: Start difference. First operand 217 states and 366 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:12,925 INFO L93 Difference]: Finished difference Result 296 states and 498 transitions. [2021-08-21 18:00:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:00:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:00:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:12,928 INFO L225 Difference]: With dead ends: 296 [2021-08-21 18:00:12,928 INFO L226 Difference]: Without dead ends: 287 [2021-08-21 18:00:12,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:00:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-21 18:00:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 223. [2021-08-21 18:00:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.6936936936936937) internal successors, (376), 222 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 376 transitions. [2021-08-21 18:00:12,932 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 376 transitions. Word has length 26 [2021-08-21 18:00:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:12,932 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 376 transitions. [2021-08-21 18:00:12,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 376 transitions. [2021-08-21 18:00:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:00:12,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:12,933 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:12,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 18:00:13,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:13,151 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:13,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2720663, now seen corresponding path program 17 times [2021-08-21 18:00:13,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:13,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767083810] [2021-08-21 18:00:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:13,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:13,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:13,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767083810] [2021-08-21 18:00:13,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767083810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:13,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718575663] [2021-08-21 18:00:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:13,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:13,193 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 18:00:13,202 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 18:00:13,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:00:13,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:00:13,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:13,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718575663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:13,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:13,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:00:13,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878754426] [2021-08-21 18:00:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:00:13,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:00:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:00:13,935 INFO L87 Difference]: Start difference. First operand 223 states and 376 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 18:00:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:13,952 INFO L93 Difference]: Finished difference Result 373 states and 610 transitions. [2021-08-21 18:00:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:00:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 28 [2021-08-21 18:00:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:13,953 INFO L225 Difference]: With dead ends: 373 [2021-08-21 18:00:13,954 INFO L226 Difference]: Without dead ends: 373 [2021-08-21 18:00:13,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:00:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-21 18:00:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 256. [2021-08-21 18:00:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.7058823529411764) internal successors, (435), 255 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 435 transitions. [2021-08-21 18:00:13,961 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 435 transitions. Word has length 28 [2021-08-21 18:00:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:13,961 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 435 transitions. [2021-08-21 18:00:13,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 18:00:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 435 transitions. [2021-08-21 18:00:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:13,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:13,962 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:13,983 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 18:00:14,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:14,177 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1616321075, now seen corresponding path program 18 times [2021-08-21 18:00:14,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:14,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854463173] [2021-08-21 18:00:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:14,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:00:14,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:14,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854463173] [2021-08-21 18:00:14,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854463173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:14,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943113191] [2021-08-21 18:00:14,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:14,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:14,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:14,508 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 18:00:14,511 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 18:00:15,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:00:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:15,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:15,815 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:15,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:15,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943113191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:15,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:15,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 18:00:15,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340274603] [2021-08-21 18:00:15,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:15,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:15,855 INFO L87 Difference]: Start difference. First operand 256 states and 435 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:16,078 INFO L93 Difference]: Finished difference Result 543 states and 907 transitions. [2021-08-21 18:00:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:00:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:16,080 INFO L225 Difference]: With dead ends: 543 [2021-08-21 18:00:16,080 INFO L226 Difference]: Without dead ends: 474 [2021-08-21 18:00:16,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-21 18:00:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 316. [2021-08-21 18:00:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.6984126984126984) internal successors, (535), 315 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 18:00:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 535 transitions. [2021-08-21 18:00:16,085 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 535 transitions. Word has length 31 [2021-08-21 18:00:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:16,085 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 535 transitions. [2021-08-21 18:00:16,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 535 transitions. [2021-08-21 18:00:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:16,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:16,086 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:16,113 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 18:00:16,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:00:16,289 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1530270341, now seen corresponding path program 19 times [2021-08-21 18:00:16,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:16,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93066020] [2021-08-21 18:00:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:16,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:16,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:16,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93066020] [2021-08-21 18:00:16,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93066020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:16,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300691985] [2021-08-21 18:00:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:16,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:16,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:16,563 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 18:00:16,576 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 18:00:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:17,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:18,016 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:18,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:18,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300691985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:18,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:18,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:18,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626801624] [2021-08-21 18:00:18,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:18,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:18,059 INFO L87 Difference]: Start difference. First operand 316 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:18,337 INFO L93 Difference]: Finished difference Result 635 states and 1087 transitions. [2021-08-21 18:00:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:00:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:18,339 INFO L225 Difference]: With dead ends: 635 [2021-08-21 18:00:18,339 INFO L226 Difference]: Without dead ends: 608 [2021-08-21 18:00:18,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-21 18:00:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 336. [2021-08-21 18:00:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.6925373134328359) internal successors, (567), 335 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 567 transitions. [2021-08-21 18:00:18,353 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 567 transitions. Word has length 31 [2021-08-21 18:00:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:18,359 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 567 transitions. [2021-08-21 18:00:18,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 567 transitions. [2021-08-21 18:00:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:18,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:18,360 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:18,383 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 18:00:18,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 18:00:18,565 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash 193466927, now seen corresponding path program 20 times [2021-08-21 18:00:18,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:18,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90904735] [2021-08-21 18:00:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:18,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:18,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:18,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90904735] [2021-08-21 18:00:18,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90904735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:18,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233958410] [2021-08-21 18:00:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:18,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:18,815 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 18:00:18,815 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 18:00:19,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:19,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:19,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:20,344 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:20,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:20,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233958410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:20,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:20,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:20,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053244856] [2021-08-21 18:00:20,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:20,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:20,382 INFO L87 Difference]: Start difference. First operand 336 states and 567 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:20,772 INFO L93 Difference]: Finished difference Result 687 states and 1175 transitions. [2021-08-21 18:00:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:00:20,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:20,774 INFO L225 Difference]: With dead ends: 687 [2021-08-21 18:00:20,774 INFO L226 Difference]: Without dead ends: 660 [2021-08-21 18:00:20,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:00:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-08-21 18:00:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 347. [2021-08-21 18:00:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.69364161849711) internal successors, (586), 346 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 586 transitions. [2021-08-21 18:00:20,781 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 586 transitions. Word has length 31 [2021-08-21 18:00:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:20,781 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 586 transitions. [2021-08-21 18:00:20,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 586 transitions. [2021-08-21 18:00:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:20,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:20,782 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:20,806 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 18:00:20,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:00:20,997 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash 410841319, now seen corresponding path program 21 times [2021-08-21 18:00:20,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:20,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458334179] [2021-08-21 18:00:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:20,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:21,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:21,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458334179] [2021-08-21 18:00:21,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458334179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:21,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223086777] [2021-08-21 18:00:21,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:21,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:21,276 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 18:00:21,276 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 18:00:22,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:22,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:22,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:22,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:23,040 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:23,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:23,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223086777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:23,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:23,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:23,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133971908] [2021-08-21 18:00:23,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:23,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:23,086 INFO L87 Difference]: Start difference. First operand 347 states and 586 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:23,388 INFO L93 Difference]: Finished difference Result 633 states and 1080 transitions. [2021-08-21 18:00:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:00:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:23,390 INFO L225 Difference]: With dead ends: 633 [2021-08-21 18:00:23,390 INFO L226 Difference]: Without dead ends: 615 [2021-08-21 18:00:23,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:00:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-21 18:00:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 350. [2021-08-21 18:00:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.6934097421203438) internal successors, (591), 349 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 591 transitions. [2021-08-21 18:00:23,399 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 591 transitions. Word has length 31 [2021-08-21 18:00:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:23,399 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 591 transitions. [2021-08-21 18:00:23,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 591 transitions. [2021-08-21 18:00:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:23,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:23,400 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:23,420 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 18:00:23,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:23,618 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash -589947869, now seen corresponding path program 22 times [2021-08-21 18:00:23,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:23,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733878113] [2021-08-21 18:00:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:23,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:00:23,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:23,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733878113] [2021-08-21 18:00:23,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733878113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:23,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016595732] [2021-08-21 18:00:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:23,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:23,836 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 18:00:23,836 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 18:00:24,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:24,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:24,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:24,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:25,327 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:25,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:25,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016595732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:25,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:25,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-08-21 18:00:25,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837499553] [2021-08-21 18:00:25,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:00:25,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:00:25,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:00:25,362 INFO L87 Difference]: Start difference. First operand 350 states and 591 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:25,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:25,592 INFO L93 Difference]: Finished difference Result 657 states and 1089 transitions. [2021-08-21 18:00:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:00:25,593 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:25,594 INFO L225 Difference]: With dead ends: 657 [2021-08-21 18:00:25,594 INFO L226 Difference]: Without dead ends: 576 [2021-08-21 18:00:25,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-08-21 18:00:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 379. [2021-08-21 18:00:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.693121693121693) internal successors, (640), 378 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 640 transitions. [2021-08-21 18:00:25,600 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 640 transitions. Word has length 31 [2021-08-21 18:00:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:25,600 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 640 transitions. [2021-08-21 18:00:25,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 640 transitions. [2021-08-21 18:00:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:25,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:25,601 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:25,620 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 18:00:25,817 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,SelfDestructingSolverStorable27 [2021-08-21 18:00:25,817 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1738323749, now seen corresponding path program 23 times [2021-08-21 18:00:25,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:25,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539152146] [2021-08-21 18:00:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:25,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:26,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:26,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539152146] [2021-08-21 18:00:26,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539152146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:26,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239850129] [2021-08-21 18:00:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:26,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:26,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:26,071 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 18:00:26,072 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 18:00:26,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:00:26,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:26,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:26,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:27,649 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:27,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239850129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:27,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:27,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 18:00:27,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887150298] [2021-08-21 18:00:27,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:00:27,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:00:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:00:27,684 INFO L87 Difference]: Start difference. First operand 379 states and 640 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:27,863 INFO L93 Difference]: Finished difference Result 734 states and 1252 transitions. [2021-08-21 18:00:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:27,865 INFO L225 Difference]: With dead ends: 734 [2021-08-21 18:00:27,865 INFO L226 Difference]: Without dead ends: 707 [2021-08-21 18:00:27,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-21 18:00:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 377. [2021-08-21 18:00:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.6914893617021276) internal successors, (636), 376 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 636 transitions. [2021-08-21 18:00:27,871 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 636 transitions. Word has length 31 [2021-08-21 18:00:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:27,871 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 636 transitions. [2021-08-21 18:00:27,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 636 transitions. [2021-08-21 18:00:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:27,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:27,871 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:27,890 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 18:00:28,078 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,SelfDestructingSolverStorable28 [2021-08-21 18:00:28,078 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:28,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1219840133, now seen corresponding path program 24 times [2021-08-21 18:00:28,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:28,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616665107] [2021-08-21 18:00:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:28,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:28,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:28,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616665107] [2021-08-21 18:00:28,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616665107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:28,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802767946] [2021-08-21 18:00:28,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:28,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:28,373 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 18:00:28,375 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 18:00:29,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:00:29,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:29,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:29,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:29,982 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:29,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:30,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802767946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:30,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:30,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 18:00:30,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285929756] [2021-08-21 18:00:30,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:30,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:30,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:30,018 INFO L87 Difference]: Start difference. First operand 377 states and 636 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:30,268 INFO L93 Difference]: Finished difference Result 758 states and 1294 transitions. [2021-08-21 18:00:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:00:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:30,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:30,270 INFO L225 Difference]: With dead ends: 758 [2021-08-21 18:00:30,270 INFO L226 Difference]: Without dead ends: 731 [2021-08-21 18:00:30,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-08-21 18:00:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 375. [2021-08-21 18:00:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.6898395721925135) internal successors, (632), 374 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 632 transitions. [2021-08-21 18:00:30,276 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 632 transitions. Word has length 31 [2021-08-21 18:00:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:30,276 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 632 transitions. [2021-08-21 18:00:30,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 632 transitions. [2021-08-21 18:00:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:30,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:30,277 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:30,297 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 18:00:30,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:30,492 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1437214525, now seen corresponding path program 25 times [2021-08-21 18:00:30,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:30,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918905430] [2021-08-21 18:00:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:30,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:30,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:30,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918905430] [2021-08-21 18:00:30,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918905430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:30,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60808763] [2021-08-21 18:00:30,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:30,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:30,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:30,813 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 18:00:30,840 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 18:00:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:31,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:32,528 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:32,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60808763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:32,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:32,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:32,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089221504] [2021-08-21 18:00:32,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:32,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:32,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:32,563 INFO L87 Difference]: Start difference. First operand 375 states and 632 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:32,843 INFO L93 Difference]: Finished difference Result 729 states and 1247 transitions. [2021-08-21 18:00:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:00:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:32,845 INFO L225 Difference]: With dead ends: 729 [2021-08-21 18:00:32,846 INFO L226 Difference]: Without dead ends: 702 [2021-08-21 18:00:32,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-21 18:00:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 356. [2021-08-21 18:00:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.6929577464788732) internal successors, (601), 355 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 601 transitions. [2021-08-21 18:00:32,851 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 601 transitions. Word has length 31 [2021-08-21 18:00:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:32,851 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 601 transitions. [2021-08-21 18:00:32,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 601 transitions. [2021-08-21 18:00:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:32,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:32,852 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:32,874 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 18:00:33,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:33,061 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 964355175, now seen corresponding path program 26 times [2021-08-21 18:00:33,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:33,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234175147] [2021-08-21 18:00:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:33,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:33,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:33,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234175147] [2021-08-21 18:00:33,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234175147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:33,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266311984] [2021-08-21 18:00:33,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:33,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:33,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:33,387 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 18:00:33,388 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 18:00:34,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:34,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:34,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:35,255 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:35,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:35,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266311984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:35,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:35,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:35,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242103724] [2021-08-21 18:00:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:35,291 INFO L87 Difference]: Start difference. First operand 356 states and 601 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:35,532 INFO L93 Difference]: Finished difference Result 748 states and 1277 transitions. [2021-08-21 18:00:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:35,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:35,535 INFO L225 Difference]: With dead ends: 748 [2021-08-21 18:00:35,535 INFO L226 Difference]: Without dead ends: 730 [2021-08-21 18:00:35,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-21 18:00:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 354. [2021-08-21 18:00:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.6968838526912182) internal successors, (599), 353 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 599 transitions. [2021-08-21 18:00:35,545 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 599 transitions. Word has length 31 [2021-08-21 18:00:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:35,545 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 599 transitions. [2021-08-21 18:00:35,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 599 transitions. [2021-08-21 18:00:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:35,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:35,546 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:35,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 18:00:35,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:35,753 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -839993113, now seen corresponding path program 27 times [2021-08-21 18:00:35,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:35,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632129940] [2021-08-21 18:00:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:35,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:36,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:36,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632129940] [2021-08-21 18:00:36,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632129940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:36,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692170072] [2021-08-21 18:00:36,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:36,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:36,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:36,016 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 18:00:36,016 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 18:00:37,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:37,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:37,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:38,084 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-21 18:00:38,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 56 [2021-08-21 18:00:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:38,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692170072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:38,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:38,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:38,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933063279] [2021-08-21 18:00:38,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:38,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:38,119 INFO L87 Difference]: Start difference. First operand 354 states and 599 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:38,441 INFO L93 Difference]: Finished difference Result 627 states and 1059 transitions. [2021-08-21 18:00:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:00:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:38,443 INFO L225 Difference]: With dead ends: 627 [2021-08-21 18:00:38,443 INFO L226 Difference]: Without dead ends: 618 [2021-08-21 18:00:38,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:00:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-08-21 18:00:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 385. [2021-08-21 18:00:38,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.6979166666666667) internal successors, (652), 384 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 652 transitions. [2021-08-21 18:00:38,450 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 652 transitions. Word has length 31 [2021-08-21 18:00:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:38,450 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 652 transitions. [2021-08-21 18:00:38,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 652 transitions. [2021-08-21 18:00:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:38,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:38,451 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:38,471 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 18:00:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:38,671 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:38,671 INFO L82 PathProgramCache]: Analyzing trace with hash -622618721, now seen corresponding path program 28 times [2021-08-21 18:00:38,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:38,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455571708] [2021-08-21 18:00:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:38,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:38,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:38,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455571708] [2021-08-21 18:00:38,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455571708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:38,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531394413] [2021-08-21 18:00:38,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:38,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:38,960 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 18:00:38,961 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 18:00:40,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:40,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:40,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:41,026 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:41,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:41,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531394413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:41,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:41,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:41,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53551952] [2021-08-21 18:00:41,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:41,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:41,063 INFO L87 Difference]: Start difference. First operand 385 states and 652 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:41,427 INFO L93 Difference]: Finished difference Result 669 states and 1129 transitions. [2021-08-21 18:00:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:00:41,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:41,429 INFO L225 Difference]: With dead ends: 669 [2021-08-21 18:00:41,429 INFO L226 Difference]: Without dead ends: 660 [2021-08-21 18:00:41,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:00:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-08-21 18:00:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 385. [2021-08-21 18:00:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.6979166666666667) internal successors, (652), 384 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 652 transitions. [2021-08-21 18:00:41,436 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 652 transitions. Word has length 31 [2021-08-21 18:00:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:41,436 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 652 transitions. [2021-08-21 18:00:41,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 652 transitions. [2021-08-21 18:00:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:41,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:41,437 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:41,461 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 18:00:41,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-21 18:00:41,653 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1623407909, now seen corresponding path program 29 times [2021-08-21 18:00:41,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:41,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813429166] [2021-08-21 18:00:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:41,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:41,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:41,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813429166] [2021-08-21 18:00:41,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813429166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:41,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899653194] [2021-08-21 18:00:41,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:41,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:41,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:41,867 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 18:00:41,868 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 18:00:43,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:00:43,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:43,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:43,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:43,974 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-21 18:00:43,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 56 [2021-08-21 18:00:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:44,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899653194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:44,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:44,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 18:00:44,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728820283] [2021-08-21 18:00:44,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:00:44,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:00:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:00:44,008 INFO L87 Difference]: Start difference. First operand 385 states and 652 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:44,450 INFO L93 Difference]: Finished difference Result 779 states and 1287 transitions. [2021-08-21 18:00:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:00:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:44,452 INFO L225 Difference]: With dead ends: 779 [2021-08-21 18:00:44,452 INFO L226 Difference]: Without dead ends: 686 [2021-08-21 18:00:44,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:00:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-08-21 18:00:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 421. [2021-08-21 18:00:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.6952380952380952) internal successors, (712), 420 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 712 transitions. [2021-08-21 18:00:44,458 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 712 transitions. Word has length 31 [2021-08-21 18:00:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:44,458 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 712 transitions. [2021-08-21 18:00:44,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 712 transitions. [2021-08-21 18:00:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:44,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:44,458 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:44,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 18:00:44,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:44,672 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:44,672 INFO L82 PathProgramCache]: Analyzing trace with hash 186380093, now seen corresponding path program 30 times [2021-08-21 18:00:44,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:44,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017549791] [2021-08-21 18:00:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:44,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:44,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:44,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017549791] [2021-08-21 18:00:44,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017549791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:44,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628196413] [2021-08-21 18:00:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:44,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:44,985 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 18:00:44,986 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 18:00:46,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:00:46,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:46,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:46,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:47,042 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:47,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:47,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628196413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:47,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:47,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 18:00:47,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637499959] [2021-08-21 18:00:47,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:47,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:47,078 INFO L87 Difference]: Start difference. First operand 421 states and 712 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:47,345 INFO L93 Difference]: Finished difference Result 892 states and 1514 transitions. [2021-08-21 18:00:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:00:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:47,347 INFO L225 Difference]: With dead ends: 892 [2021-08-21 18:00:47,347 INFO L226 Difference]: Without dead ends: 865 [2021-08-21 18:00:47,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-08-21 18:00:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 443. [2021-08-21 18:00:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.6968325791855203) internal successors, (750), 442 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 750 transitions. [2021-08-21 18:00:47,353 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 750 transitions. Word has length 31 [2021-08-21 18:00:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:47,354 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 750 transitions. [2021-08-21 18:00:47,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 750 transitions. [2021-08-21 18:00:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:47,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:47,354 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:47,376 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 18:00:47,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:47,569 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash 403754485, now seen corresponding path program 31 times [2021-08-21 18:00:47,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:47,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399939378] [2021-08-21 18:00:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:47,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:47,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:47,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399939378] [2021-08-21 18:00:47,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399939378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:47,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214225879] [2021-08-21 18:00:47,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:47,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:47,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:47,809 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 18:00:47,811 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 18:00:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:49,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:49,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:49,890 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:49,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:49,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214225879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:49,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:49,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:49,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379028863] [2021-08-21 18:00:49,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:49,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:49,926 INFO L87 Difference]: Start difference. First operand 443 states and 750 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:50,184 INFO L93 Difference]: Finished difference Result 864 states and 1468 transitions. [2021-08-21 18:00:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:00:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:50,186 INFO L225 Difference]: With dead ends: 864 [2021-08-21 18:00:50,187 INFO L226 Difference]: Without dead ends: 837 [2021-08-21 18:00:50,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-08-21 18:00:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 441. [2021-08-21 18:00:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.6954545454545455) internal successors, (746), 440 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 746 transitions. [2021-08-21 18:00:50,193 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 746 transitions. Word has length 31 [2021-08-21 18:00:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:50,193 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 746 transitions. [2021-08-21 18:00:50,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 746 transitions. [2021-08-21 18:00:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:50,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:50,194 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:50,229 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 18:00:50,404 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,SelfDestructingSolverStorable36 [2021-08-21 18:00:50,404 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -69104865, now seen corresponding path program 32 times [2021-08-21 18:00:50,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:50,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17028057] [2021-08-21 18:00:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:50,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:50,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:50,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17028057] [2021-08-21 18:00:50,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17028057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:50,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671576318] [2021-08-21 18:00:50,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:50,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:50,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:50,757 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 18:00:50,758 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 18:00:52,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:52,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:52,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:52,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:53,029 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:53,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:53,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671576318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:53,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:53,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:00:53,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911203071] [2021-08-21 18:00:53,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:53,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:53,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:53,067 INFO L87 Difference]: Start difference. First operand 441 states and 746 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:53,330 INFO L93 Difference]: Finished difference Result 843 states and 1436 transitions. [2021-08-21 18:00:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:53,333 INFO L225 Difference]: With dead ends: 843 [2021-08-21 18:00:53,333 INFO L226 Difference]: Without dead ends: 825 [2021-08-21 18:00:53,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-08-21 18:00:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 439. [2021-08-21 18:00:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.6940639269406392) internal successors, (742), 438 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 18:00:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 742 transitions. [2021-08-21 18:00:53,339 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 742 transitions. Word has length 31 [2021-08-21 18:00:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:53,340 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 742 transitions. [2021-08-21 18:00:53,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 742 transitions. [2021-08-21 18:00:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:53,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:53,340 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:53,360 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 18:00:53,552 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,SelfDestructingSolverStorable37 [2021-08-21 18:00:53,552 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 463328099, now seen corresponding path program 33 times [2021-08-21 18:00:53,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:53,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115360846] [2021-08-21 18:00:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:53,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:53,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:53,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115360846] [2021-08-21 18:00:53,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115360846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:53,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29171610] [2021-08-21 18:00:53,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:53,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:53,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:53,789 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 18:00:53,790 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 18:00:55,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:00:55,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:55,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:55,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:56,005 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:56,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:56,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29171610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:56,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:56,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-21 18:00:56,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141368170] [2021-08-21 18:00:56,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:00:56,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:00:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:00:56,046 INFO L87 Difference]: Start difference. First operand 439 states and 742 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:56,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:56,209 INFO L93 Difference]: Finished difference Result 814 states and 1384 transitions. [2021-08-21 18:00:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:00:56,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:56,211 INFO L225 Difference]: With dead ends: 814 [2021-08-21 18:00:56,211 INFO L226 Difference]: Without dead ends: 769 [2021-08-21 18:00:56,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:00:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-21 18:00:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 473. [2021-08-21 18:00:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.6991525423728813) internal successors, (802), 472 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 802 transitions. [2021-08-21 18:00:56,217 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 802 transitions. Word has length 31 [2021-08-21 18:00:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:56,217 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 802 transitions. [2021-08-21 18:00:56,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 802 transitions. [2021-08-21 18:00:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:56,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:56,218 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:56,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:00:56,436 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,SelfDestructingSolverStorable38 [2021-08-21 18:00:56,437 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2021851195, now seen corresponding path program 34 times [2021-08-21 18:00:56,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:56,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889517570] [2021-08-21 18:00:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:56,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:56,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:56,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889517570] [2021-08-21 18:00:56,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889517570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:56,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095103381] [2021-08-21 18:00:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:56,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:56,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:56,681 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 18:00:56,712 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 18:00:58,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:58,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:58,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:58,968 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:00:58,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:00:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:59,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095103381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:59,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:59,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-21 18:00:59,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677187132] [2021-08-21 18:00:59,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:59,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:59,005 INFO L87 Difference]: Start difference. First operand 473 states and 802 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:59,266 INFO L93 Difference]: Finished difference Result 888 states and 1512 transitions. [2021-08-21 18:00:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:00:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:00:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:59,268 INFO L225 Difference]: With dead ends: 888 [2021-08-21 18:00:59,268 INFO L226 Difference]: Without dead ends: 861 [2021-08-21 18:00:59,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-08-21 18:00:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 463. [2021-08-21 18:00:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.696969696969697) internal successors, (784), 462 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 784 transitions. [2021-08-21 18:00:59,274 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 784 transitions. Word has length 31 [2021-08-21 18:00:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:59,274 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 784 transitions. [2021-08-21 18:00:59,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 784 transitions. [2021-08-21 18:00:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:00:59,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:59,275 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:59,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 18:00:59,475 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,SelfDestructingSolverStorable39 [2021-08-21 18:00:59,475 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1804476803, now seen corresponding path program 35 times [2021-08-21 18:00:59,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:59,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082452759] [2021-08-21 18:00:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:59,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:59,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:59,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082452759] [2021-08-21 18:00:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082452759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:59,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721741552] [2021-08-21 18:00:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:59,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:59,745 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 18:00:59,746 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 18:01:01,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:01:01,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:01,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:01:01,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:02,043 INFO L354 Elim1Store]: treesize reduction 296, result has 4.2 percent of original size [2021-08-21 18:01:02,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 62 treesize of output 46 [2021-08-21 18:01:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:02,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721741552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:02,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:02,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-21 18:01:02,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644272729] [2021-08-21 18:01:02,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:01:02,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:02,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:01:02,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:01:02,087 INFO L87 Difference]: Start difference. First operand 463 states and 784 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:03,017 INFO L93 Difference]: Finished difference Result 975 states and 1641 transitions. [2021-08-21 18:01:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:01:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:03,021 INFO L225 Difference]: With dead ends: 975 [2021-08-21 18:01:03,021 INFO L226 Difference]: Without dead ends: 912 [2021-08-21 18:01:03,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 926.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:01:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-08-21 18:01:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 477. [2021-08-21 18:01:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.6932773109243697) internal successors, (806), 476 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 806 transitions. [2021-08-21 18:01:03,027 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 806 transitions. Word has length 31 [2021-08-21 18:01:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:03,027 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 806 transitions. [2021-08-21 18:01:03,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 806 transitions. [2021-08-21 18:01:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:03,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:03,028 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:03,049 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 18:01:03,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:03,230 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:03,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:03,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2017631143, now seen corresponding path program 36 times [2021-08-21 18:01:03,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:03,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170609613] [2021-08-21 18:01:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:03,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:03,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:03,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170609613] [2021-08-21 18:01:03,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170609613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:03,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135276626] [2021-08-21 18:01:03,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:03,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:03,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:03,480 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 18:01:03,480 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 18:01:05,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:01:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:05,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:05,898 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:01:05,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:01:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:05,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135276626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:05,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:05,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:01:05,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020946029] [2021-08-21 18:01:05,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:01:05,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:01:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:01:05,941 INFO L87 Difference]: Start difference. First operand 477 states and 806 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:06,193 INFO L93 Difference]: Finished difference Result 787 states and 1339 transitions. [2021-08-21 18:01:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:06,195 INFO L225 Difference]: With dead ends: 787 [2021-08-21 18:01:06,195 INFO L226 Difference]: Without dead ends: 778 [2021-08-21 18:01:06,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:01:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-08-21 18:01:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 477. [2021-08-21 18:01:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.6932773109243697) internal successors, (806), 476 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 806 transitions. [2021-08-21 18:01:06,201 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 806 transitions. Word has length 31 [2021-08-21 18:01:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:06,201 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 806 transitions. [2021-08-21 18:01:06,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 806 transitions. [2021-08-21 18:01:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:06,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:06,202 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:06,223 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 18:01:06,404 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,SelfDestructingSolverStorable41 [2021-08-21 18:01:06,405 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash 461024351, now seen corresponding path program 37 times [2021-08-21 18:01:06,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:06,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310325653] [2021-08-21 18:01:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:06,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:06,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:06,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310325653] [2021-08-21 18:01:06,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310325653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:06,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068430128] [2021-08-21 18:01:06,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:06,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:06,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:06,669 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 18:01:06,670 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 18:01:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:08,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:08,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:09,106 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-21 18:01:09,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-21 18:01:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:09,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068430128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:09,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:09,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-21 18:01:09,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036060965] [2021-08-21 18:01:09,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:01:09,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:01:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:01:09,145 INFO L87 Difference]: Start difference. First operand 477 states and 806 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:09,342 INFO L93 Difference]: Finished difference Result 794 states and 1352 transitions. [2021-08-21 18:01:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:09,344 INFO L225 Difference]: With dead ends: 794 [2021-08-21 18:01:09,344 INFO L226 Difference]: Without dead ends: 785 [2021-08-21 18:01:09,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:01:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-08-21 18:01:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 486. [2021-08-21 18:01:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.6927835051546392) internal successors, (821), 485 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 821 transitions. [2021-08-21 18:01:09,350 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 821 transitions. Word has length 31 [2021-08-21 18:01:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:09,350 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 821 transitions. [2021-08-21 18:01:09,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 821 transitions. [2021-08-21 18:01:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:09,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:09,351 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:09,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:09,565 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,SelfDestructingSolverStorable42 [2021-08-21 18:01:09,565 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:09,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1326284719, now seen corresponding path program 38 times [2021-08-21 18:01:09,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:09,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928383669] [2021-08-21 18:01:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:09,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:09,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:09,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928383669] [2021-08-21 18:01:09,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928383669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:09,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262128500] [2021-08-21 18:01:09,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:09,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:09,832 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 18:01:09,832 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 18:01:11,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:11,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:11,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:12,212 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:12,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:12,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262128500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:12,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:12,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:01:12,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512284907] [2021-08-21 18:01:12,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:12,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:12,247 INFO L87 Difference]: Start difference. First operand 486 states and 821 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:12,545 INFO L93 Difference]: Finished difference Result 1017 states and 1699 transitions. [2021-08-21 18:01:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:01:12,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:12,548 INFO L225 Difference]: With dead ends: 1017 [2021-08-21 18:01:12,548 INFO L226 Difference]: Without dead ends: 936 [2021-08-21 18:01:12,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:01:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-08-21 18:01:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 564. [2021-08-21 18:01:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.6856127886323269) internal successors, (949), 563 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 949 transitions. [2021-08-21 18:01:12,554 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 949 transitions. Word has length 31 [2021-08-21 18:01:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:12,554 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 949 transitions. [2021-08-21 18:01:12,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 949 transitions. [2021-08-21 18:01:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:12,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:12,555 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:12,578 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 18:01:12,768 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,SelfDestructingSolverStorable43 [2021-08-21 18:01:12,769 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash -941520183, now seen corresponding path program 39 times [2021-08-21 18:01:12,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:12,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076304683] [2021-08-21 18:01:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:12,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:13,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:13,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076304683] [2021-08-21 18:01:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076304683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:13,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459979177] [2021-08-21 18:01:13,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:13,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:13,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:13,022 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 18:01:13,022 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 18:01:14,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:01:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:14,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:01:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:15,536 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-21 18:01:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 48 [2021-08-21 18:01:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459979177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:15,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:15,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:01:15,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143198924] [2021-08-21 18:01:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:15,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:15,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:15,574 INFO L87 Difference]: Start difference. First operand 564 states and 949 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:15,860 INFO L93 Difference]: Finished difference Result 994 states and 1662 transitions. [2021-08-21 18:01:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:01:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:15,862 INFO L225 Difference]: With dead ends: 994 [2021-08-21 18:01:15,862 INFO L226 Difference]: Without dead ends: 931 [2021-08-21 18:01:15,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:01:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-08-21 18:01:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 620. [2021-08-21 18:01:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 1.6882067851373181) internal successors, (1045), 619 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1045 transitions. [2021-08-21 18:01:15,869 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1045 transitions. Word has length 31 [2021-08-21 18:01:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:15,869 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1045 transitions. [2021-08-21 18:01:15,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1045 transitions. [2021-08-21 18:01:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:15,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:15,870 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:15,891 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 18:01:16,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:16,080 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1942309371, now seen corresponding path program 40 times [2021-08-21 18:01:16,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:16,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186328996] [2021-08-21 18:01:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:16,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:16,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186328996] [2021-08-21 18:01:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186328996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730568563] [2021-08-21 18:01:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:16,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:16,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:16,333 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 18:01:16,334 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 18:01:18,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:18,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:18,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:18,824 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:18,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:18,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730568563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:18,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:18,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 18:01:18,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278945720] [2021-08-21 18:01:18,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:01:18,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:01:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:18,859 INFO L87 Difference]: Start difference. First operand 620 states and 1045 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:19,155 INFO L93 Difference]: Finished difference Result 1065 states and 1771 transitions. [2021-08-21 18:01:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:01:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:19,157 INFO L225 Difference]: With dead ends: 1065 [2021-08-21 18:01:19,158 INFO L226 Difference]: Without dead ends: 966 [2021-08-21 18:01:19,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:01:19,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-08-21 18:01:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 549. [2021-08-21 18:01:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.697080291970803) internal successors, (930), 548 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 930 transitions. [2021-08-21 18:01:19,164 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 930 transitions. Word has length 31 [2021-08-21 18:01:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:19,164 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 930 transitions. [2021-08-21 18:01:19,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 930 transitions. [2021-08-21 18:01:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:19,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:19,165 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:19,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:19,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:19,381 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 84853023, now seen corresponding path program 41 times [2021-08-21 18:01:19,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:19,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70380663] [2021-08-21 18:01:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:19,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:19,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:19,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70380663] [2021-08-21 18:01:19,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70380663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:19,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122586596] [2021-08-21 18:01:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:19,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:19,631 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 18:01:19,632 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 18:01:21,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:01:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:21,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:22,286 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:22,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:22,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122586596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:22,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:22,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:01:22,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702617357] [2021-08-21 18:01:22,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:22,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:22,321 INFO L87 Difference]: Start difference. First operand 549 states and 930 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:22,594 INFO L93 Difference]: Finished difference Result 1055 states and 1797 transitions. [2021-08-21 18:01:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:01:22,595 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:22,597 INFO L225 Difference]: With dead ends: 1055 [2021-08-21 18:01:22,597 INFO L226 Difference]: Without dead ends: 1028 [2021-08-21 18:01:22,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:01:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-08-21 18:01:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 573. [2021-08-21 18:01:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.6993006993006994) internal successors, (972), 572 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 972 transitions. [2021-08-21 18:01:22,604 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 972 transitions. Word has length 31 [2021-08-21 18:01:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:22,604 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 972 transitions. [2021-08-21 18:01:22,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 972 transitions. [2021-08-21 18:01:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:22,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:22,605 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:22,627 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 18:01:22,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:01:22,817 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash -388006327, now seen corresponding path program 42 times [2021-08-21 18:01:22,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:22,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629151382] [2021-08-21 18:01:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:22,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:23,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:23,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629151382] [2021-08-21 18:01:23,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629151382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:23,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018832757] [2021-08-21 18:01:23,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:23,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:23,090 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 18:01:23,091 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 18:01:25,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:01:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:25,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:25,686 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:25,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:25,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018832757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:25,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:25,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:01:25,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42654651] [2021-08-21 18:01:25,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:25,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:25,722 INFO L87 Difference]: Start difference. First operand 573 states and 972 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:25,972 INFO L93 Difference]: Finished difference Result 957 states and 1636 transitions. [2021-08-21 18:01:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:01:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:25,974 INFO L225 Difference]: With dead ends: 957 [2021-08-21 18:01:25,974 INFO L226 Difference]: Without dead ends: 939 [2021-08-21 18:01:25,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:01:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-08-21 18:01:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 576. [2021-08-21 18:01:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.6991304347826086) internal successors, (977), 575 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 18:01:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 977 transitions. [2021-08-21 18:01:25,980 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 977 transitions. Word has length 31 [2021-08-21 18:01:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:25,981 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 977 transitions. [2021-08-21 18:01:25,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 977 transitions. [2021-08-21 18:01:25,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:25,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:25,982 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:26,003 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 18:01:26,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:01:26,188 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:26,188 INFO L82 PathProgramCache]: Analyzing trace with hash 144426637, now seen corresponding path program 43 times [2021-08-21 18:01:26,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:26,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082115725] [2021-08-21 18:01:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:26,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:26,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:26,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082115725] [2021-08-21 18:01:26,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082115725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:26,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773954275] [2021-08-21 18:01:26,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:26,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:26,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:26,455 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 18:01:26,455 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 18:01:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:28,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:29,144 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:29,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:29,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773954275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:29,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:29,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 18:01:29,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006198613] [2021-08-21 18:01:29,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:01:29,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:29,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:01:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:29,180 INFO L87 Difference]: Start difference. First operand 576 states and 977 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:29,401 INFO L93 Difference]: Finished difference Result 1119 states and 1903 transitions. [2021-08-21 18:01:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:01:29,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:29,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:29,403 INFO L225 Difference]: With dead ends: 1119 [2021-08-21 18:01:29,403 INFO L226 Difference]: Without dead ends: 1068 [2021-08-21 18:01:29,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-08-21 18:01:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 637. [2021-08-21 18:01:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.7075471698113207) internal successors, (1086), 636 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1086 transitions. [2021-08-21 18:01:29,410 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1086 transitions. Word has length 31 [2021-08-21 18:01:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:29,410 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1086 transitions. [2021-08-21 18:01:29,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1086 transitions. [2021-08-21 18:01:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:29,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:29,411 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:29,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:01:29,619 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,SelfDestructingSolverStorable48 [2021-08-21 18:01:29,619 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2123378265, now seen corresponding path program 44 times [2021-08-21 18:01:29,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:29,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924445271] [2021-08-21 18:01:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:29,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:29,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:29,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924445271] [2021-08-21 18:01:29,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924445271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:29,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939053738] [2021-08-21 18:01:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:29,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:29,933 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 18:01:29,960 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 18:01:32,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:32,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:32,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:32,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:32,752 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:32,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:32,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939053738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:32,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:32,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:01:32,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27489488] [2021-08-21 18:01:32,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:32,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:32,793 INFO L87 Difference]: Start difference. First operand 637 states and 1086 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:33,073 INFO L93 Difference]: Finished difference Result 1110 states and 1900 transitions. [2021-08-21 18:01:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:33,075 INFO L225 Difference]: With dead ends: 1110 [2021-08-21 18:01:33,075 INFO L226 Difference]: Without dead ends: 1083 [2021-08-21 18:01:33,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-08-21 18:01:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 648. [2021-08-21 18:01:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7109737248840804) internal successors, (1107), 647 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1107 transitions. [2021-08-21 18:01:33,082 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1107 transitions. Word has length 31 [2021-08-21 18:01:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:33,082 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1107 transitions. [2021-08-21 18:01:33,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1107 transitions. [2021-08-21 18:01:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:33,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:33,083 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:33,104 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 18:01:33,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:33,284 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1698729681, now seen corresponding path program 45 times [2021-08-21 18:01:33,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:33,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416470433] [2021-08-21 18:01:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:33,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:33,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:33,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416470433] [2021-08-21 18:01:33,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416470433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:33,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153827198] [2021-08-21 18:01:33,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:33,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:33,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:33,549 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 18:01:33,550 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 18:01:35,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:01:35,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:35,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:35,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:36,335 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:36,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:36,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153827198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:36,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:36,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:01:36,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079532591] [2021-08-21 18:01:36,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:36,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:36,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:36,370 INFO L87 Difference]: Start difference. First operand 648 states and 1107 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:36,599 INFO L93 Difference]: Finished difference Result 924 states and 1582 transitions. [2021-08-21 18:01:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:36,605 INFO L225 Difference]: With dead ends: 924 [2021-08-21 18:01:36,605 INFO L226 Difference]: Without dead ends: 915 [2021-08-21 18:01:36,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-21 18:01:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 648. [2021-08-21 18:01:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7109737248840804) internal successors, (1107), 647 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1107 transitions. [2021-08-21 18:01:36,612 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1107 transitions. Word has length 31 [2021-08-21 18:01:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:36,612 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1107 transitions. [2021-08-21 18:01:36,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1107 transitions. [2021-08-21 18:01:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:36,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:36,613 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:36,637 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 18:01:36,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:36,827 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 142122889, now seen corresponding path program 46 times [2021-08-21 18:01:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:36,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088012102] [2021-08-21 18:01:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:36,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:37,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:37,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088012102] [2021-08-21 18:01:37,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088012102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:37,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550619770] [2021-08-21 18:01:37,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:37,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:37,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:37,187 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 18:01:37,188 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 18:01:39,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:39,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:39,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:39,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:40,105 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:01:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:01:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:40,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550619770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:40,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:40,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:01:40,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816642] [2021-08-21 18:01:40,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:40,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:40,139 INFO L87 Difference]: Start difference. First operand 648 states and 1107 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:40,457 INFO L93 Difference]: Finished difference Result 931 states and 1595 transitions. [2021-08-21 18:01:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:40,459 INFO L225 Difference]: With dead ends: 931 [2021-08-21 18:01:40,459 INFO L226 Difference]: Without dead ends: 922 [2021-08-21 18:01:40,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-08-21 18:01:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 648. [2021-08-21 18:01:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7109737248840804) internal successors, (1107), 647 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1107 transitions. [2021-08-21 18:01:40,469 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1107 transitions. Word has length 31 [2021-08-21 18:01:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:40,469 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1107 transitions. [2021-08-21 18:01:40,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1107 transitions. [2021-08-21 18:01:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:40,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:40,471 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:40,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:40,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:40,689 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1353400477, now seen corresponding path program 47 times [2021-08-21 18:01:40,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:40,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745980630] [2021-08-21 18:01:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:40,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:40,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:40,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745980630] [2021-08-21 18:01:40,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745980630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:40,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597974360] [2021-08-21 18:01:40,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:40,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:40,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:40,997 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 18:01:40,998 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 18:01:43,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:01:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:43,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:43,923 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:01:43,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 18:01:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:43,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597974360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:43,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:43,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-21 18:01:43,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327467070] [2021-08-21 18:01:43,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:01:43,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:43,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:01:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:01:43,959 INFO L87 Difference]: Start difference. First operand 648 states and 1107 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:44,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:44,131 INFO L93 Difference]: Finished difference Result 978 states and 1664 transitions. [2021-08-21 18:01:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:44,132 INFO L225 Difference]: With dead ends: 978 [2021-08-21 18:01:44,132 INFO L226 Difference]: Without dead ends: 921 [2021-08-21 18:01:44,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:01:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-08-21 18:01:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 668. [2021-08-21 18:01:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.719640179910045) internal successors, (1147), 667 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1147 transitions. [2021-08-21 18:01:44,139 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1147 transitions. Word has length 31 [2021-08-21 18:01:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:44,139 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1147 transitions. [2021-08-21 18:01:44,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1147 transitions. [2021-08-21 18:01:44,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:44,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:44,140 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:44,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 18:01:44,343 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,SelfDestructingSolverStorable52 [2021-08-21 18:01:44,343 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:44,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1793190939, now seen corresponding path program 48 times [2021-08-21 18:01:44,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:44,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813963436] [2021-08-21 18:01:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:44,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:44,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:44,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813963436] [2021-08-21 18:01:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813963436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:44,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325828917] [2021-08-21 18:01:44,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:44,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:44,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:44,595 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 18:01:44,598 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 18:01:46,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:01:46,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:46,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:46,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:47,523 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:01:47,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 18:01:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:47,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325828917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:47,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:47,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-21 18:01:47,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939404511] [2021-08-21 18:01:47,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:01:47,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:01:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:01:47,558 INFO L87 Difference]: Start difference. First operand 668 states and 1147 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:47,793 INFO L93 Difference]: Finished difference Result 1134 states and 1956 transitions. [2021-08-21 18:01:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:47,794 INFO L225 Difference]: With dead ends: 1134 [2021-08-21 18:01:47,794 INFO L226 Difference]: Without dead ends: 1107 [2021-08-21 18:01:47,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:01:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-08-21 18:01:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 664. [2021-08-21 18:01:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.7179487179487178) internal successors, (1139), 663 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1139 transitions. [2021-08-21 18:01:47,802 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1139 transitions. Word has length 31 [2021-08-21 18:01:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:47,802 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1139 transitions. [2021-08-21 18:01:47,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1139 transitions. [2021-08-21 18:01:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:47,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:47,803 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:47,830 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 18:01:48,018 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,SelfDestructingSolverStorable53 [2021-08-21 18:01:48,018 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:48,019 INFO L82 PathProgramCache]: Analyzing trace with hash 673761917, now seen corresponding path program 49 times [2021-08-21 18:01:48,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:48,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068045060] [2021-08-21 18:01:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:48,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:48,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068045060] [2021-08-21 18:01:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068045060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899808346] [2021-08-21 18:01:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:48,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:48,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:48,299 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 18:01:48,299 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 18:01:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:50,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:51,300 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:01:51,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 18:01:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:51,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899808346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:51,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:51,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 18:01:51,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802458827] [2021-08-21 18:01:51,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:01:51,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:01:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:51,335 INFO L87 Difference]: Start difference. First operand 664 states and 1139 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:51,583 INFO L93 Difference]: Finished difference Result 1114 states and 1906 transitions. [2021-08-21 18:01:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:51,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:51,585 INFO L225 Difference]: With dead ends: 1114 [2021-08-21 18:01:51,585 INFO L226 Difference]: Without dead ends: 1087 [2021-08-21 18:01:51,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-08-21 18:01:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 654. [2021-08-21 18:01:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.7166921898928025) internal successors, (1121), 653 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1121 transitions. [2021-08-21 18:01:51,592 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1121 transitions. Word has length 31 [2021-08-21 18:01:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:51,592 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1121 transitions. [2021-08-21 18:01:51,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1121 transitions. [2021-08-21 18:01:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:51,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:51,593 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:51,618 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 18:01:51,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:51,817 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 200902567, now seen corresponding path program 50 times [2021-08-21 18:01:51,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:51,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529429040] [2021-08-21 18:01:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:51,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:52,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:52,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529429040] [2021-08-21 18:01:52,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529429040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:52,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700428060] [2021-08-21 18:01:52,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:52,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:52,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:52,163 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 18:01:52,188 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 18:01:54,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:54,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:54,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:54,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:55,172 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:01:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 18:01:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:55,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700428060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:55,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:55,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 18:01:55,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495416901] [2021-08-21 18:01:55,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:01:55,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:01:55,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:55,208 INFO L87 Difference]: Start difference. First operand 654 states and 1121 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:55,475 INFO L93 Difference]: Finished difference Result 952 states and 1636 transitions. [2021-08-21 18:01:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:55,476 INFO L225 Difference]: With dead ends: 952 [2021-08-21 18:01:55,477 INFO L226 Difference]: Without dead ends: 943 [2021-08-21 18:01:55,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-21 18:01:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 653. [2021-08-21 18:01:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.7177914110429449) internal successors, (1120), 652 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1120 transitions. [2021-08-21 18:01:55,483 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1120 transitions. Word has length 31 [2021-08-21 18:01:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:55,483 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1120 transitions. [2021-08-21 18:01:55,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1120 transitions. [2021-08-21 18:01:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:55,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:55,484 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:55,506 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 18:01:55,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 18:01:55,692 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:55,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1355704225, now seen corresponding path program 51 times [2021-08-21 18:01:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:55,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107871042] [2021-08-21 18:01:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:55,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:56,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:56,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107871042] [2021-08-21 18:01:56,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107871042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:56,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546858140] [2021-08-21 18:01:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:56,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:56,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:56,054 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 18:01:56,080 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 18:01:58,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:01:58,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:58,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:58,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:59,167 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 18:01:59,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-21 18:01:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:59,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546858140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:59,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:59,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 18:01:59,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748950604] [2021-08-21 18:01:59,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:01:59,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:01:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:59,203 INFO L87 Difference]: Start difference. First operand 653 states and 1120 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:59,383 INFO L93 Difference]: Finished difference Result 943 states and 1619 transitions. [2021-08-21 18:01:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:01:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:59,385 INFO L225 Difference]: With dead ends: 943 [2021-08-21 18:01:59,385 INFO L226 Difference]: Without dead ends: 934 [2021-08-21 18:01:59,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 357.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:01:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-08-21 18:01:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 648. [2021-08-21 18:01:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7171561051004636) internal successors, (1111), 647 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1111 transitions. [2021-08-21 18:01:59,391 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1111 transitions. Word has length 31 [2021-08-21 18:01:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:59,392 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1111 transitions. [2021-08-21 18:01:59,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1111 transitions. [2021-08-21 18:01:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:01:59,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:59,392 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:59,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:01:59,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 18:01:59,593 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -507006199, now seen corresponding path program 52 times [2021-08-21 18:01:59,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:59,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789592218] [2021-08-21 18:01:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:59,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:59,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:59,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789592218] [2021-08-21 18:01:59,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789592218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:59,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635823931] [2021-08-21 18:01:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:59,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:59,861 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 18:01:59,862 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 18:02:02,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:02,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:02,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:02,898 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:02:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 32 [2021-08-21 18:02:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:02,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635823931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:02,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:02,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-21 18:02:02,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96027924] [2021-08-21 18:02:02,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:02:02,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:02:02,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:02:02,932 INFO L87 Difference]: Start difference. First operand 648 states and 1111 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 18:02:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:03,171 INFO L93 Difference]: Finished difference Result 855 states and 1461 transitions. [2021-08-21 18:02:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:02:03,171 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 31 [2021-08-21 18:02:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:03,173 INFO L225 Difference]: With dead ends: 855 [2021-08-21 18:02:03,173 INFO L226 Difference]: Without dead ends: 846 [2021-08-21 18:02:03,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:02:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-21 18:02:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 654. [2021-08-21 18:02:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.7166921898928025) internal successors, (1121), 653 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1121 transitions. [2021-08-21 18:02:03,179 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1121 transitions. Word has length 31 [2021-08-21 18:02:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:03,179 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1121 transitions. [2021-08-21 18:02:03,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 18:02:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1121 transitions. [2021-08-21 18:02:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:03,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:03,180 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:03,206 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 18:02:03,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:03,381 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1427974998, now seen corresponding path program 53 times [2021-08-21 18:02:03,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:03,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848038101] [2021-08-21 18:02:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:03,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:03,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:03,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848038101] [2021-08-21 18:02:03,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848038101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:03,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536593331] [2021-08-21 18:02:03,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:03,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:03,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:03,429 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 18:02:03,464 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 18:02:06,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:02:06,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:02:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:06,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536593331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:06,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:06,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:02:06,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706177583] [2021-08-21 18:02:06,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:02:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:02:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:02:06,136 INFO L87 Difference]: Start difference. First operand 654 states and 1121 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:06,158 INFO L93 Difference]: Finished difference Result 877 states and 1473 transitions. [2021-08-21 18:02:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:02:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:06,159 INFO L225 Difference]: With dead ends: 877 [2021-08-21 18:02:06,159 INFO L226 Difference]: Without dead ends: 877 [2021-08-21 18:02:06,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:02:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-08-21 18:02:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 705. [2021-08-21 18:02:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 1.71875) internal successors, (1210), 704 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1210 transitions. [2021-08-21 18:02:06,166 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1210 transitions. Word has length 33 [2021-08-21 18:02:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:06,166 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1210 transitions. [2021-08-21 18:02:06,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1210 transitions. [2021-08-21 18:02:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:02:06,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:06,167 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:06,193 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 18:02:06,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:06,393 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1558742331, now seen corresponding path program 54 times [2021-08-21 18:02:06,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:06,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738869280] [2021-08-21 18:02:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:06,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:02:06,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:06,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738869280] [2021-08-21 18:02:06,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738869280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:06,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199529095] [2021-08-21 18:02:06,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:06,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:06,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:06,633 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 18:02:06,667 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 18:02:09,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:02:09,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:09,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:02:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:10,010 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:02:10,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:02:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:10,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199529095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:10,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:10,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 18:02:10,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306509474] [2021-08-21 18:02:10,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:02:10,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:02:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:02:10,055 INFO L87 Difference]: Start difference. First operand 705 states and 1210 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:10,335 INFO L93 Difference]: Finished difference Result 1166 states and 2004 transitions. [2021-08-21 18:02:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:02:10,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:02:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:10,337 INFO L225 Difference]: With dead ends: 1166 [2021-08-21 18:02:10,337 INFO L226 Difference]: Without dead ends: 1157 [2021-08-21 18:02:10,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:02:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-08-21 18:02:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 725. [2021-08-21 18:02:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.718232044198895) internal successors, (1244), 724 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1244 transitions. [2021-08-21 18:02:10,345 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1244 transitions. Word has length 34 [2021-08-21 18:02:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:10,345 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 1244 transitions. [2021-08-21 18:02:10,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1244 transitions. [2021-08-21 18:02:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:02:10,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:10,346 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:10,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 18:02:10,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:02:10,547 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1294435523, now seen corresponding path program 55 times [2021-08-21 18:02:10,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:10,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761299273] [2021-08-21 18:02:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:10,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:10,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:10,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761299273] [2021-08-21 18:02:10,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761299273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:10,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518908746] [2021-08-21 18:02:10,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:10,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:10,799 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 18:02:10,800 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 18:02:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:13,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:14,258 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:02:14,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:02:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518908746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:14,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:14,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-21 18:02:14,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233349695] [2021-08-21 18:02:14,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:02:14,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:02:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:02:14,295 INFO L87 Difference]: Start difference. First operand 725 states and 1244 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:14,675 INFO L93 Difference]: Finished difference Result 1312 states and 2254 transitions. [2021-08-21 18:02:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:02:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:02:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:14,677 INFO L225 Difference]: With dead ends: 1312 [2021-08-21 18:02:14,677 INFO L226 Difference]: Without dead ends: 1285 [2021-08-21 18:02:14,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:02:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-08-21 18:02:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 751. [2021-08-21 18:02:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.7173333333333334) internal successors, (1288), 750 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1288 transitions. [2021-08-21 18:02:14,685 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1288 transitions. Word has length 34 [2021-08-21 18:02:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:14,685 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1288 transitions. [2021-08-21 18:02:14,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1288 transitions. [2021-08-21 18:02:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:02:14,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:14,686 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:14,711 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 18:02:14,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:14,889 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash -482435801, now seen corresponding path program 56 times [2021-08-21 18:02:14,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:14,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185734932] [2021-08-21 18:02:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:14,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:15,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:15,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185734932] [2021-08-21 18:02:15,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185734932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:15,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520869477] [2021-08-21 18:02:15,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:02:15,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:15,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:15,138 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 18:02:15,138 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 18:02:17,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:02:17,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:17,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:17,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:18,577 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-21 18:02:18,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-21 18:02:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:18,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520869477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:18,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:18,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-21 18:02:18,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513247717] [2021-08-21 18:02:18,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:02:18,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:02:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:02:18,611 INFO L87 Difference]: Start difference. First operand 751 states and 1288 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:18,892 INFO L93 Difference]: Finished difference Result 1248 states and 2138 transitions. [2021-08-21 18:02:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:02:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:02:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:18,894 INFO L225 Difference]: With dead ends: 1248 [2021-08-21 18:02:18,894 INFO L226 Difference]: Without dead ends: 1221 [2021-08-21 18:02:18,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 441.5ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:02:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-08-21 18:02:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 745. [2021-08-21 18:02:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.7150537634408602) internal successors, (1276), 744 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1276 transitions. [2021-08-21 18:02:18,901 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1276 transitions. Word has length 34 [2021-08-21 18:02:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:18,901 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1276 transitions. [2021-08-21 18:02:18,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1276 transitions. [2021-08-21 18:02:18,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:02:18,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:18,902 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:18,926 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 18:02:19,102 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,SelfDestructingSolverStorable61 [2021-08-21 18:02:19,103 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1898273288, now seen corresponding path program 57 times [2021-08-21 18:02:19,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:19,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667404235] [2021-08-21 18:02:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:19,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:02:19,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667404235] [2021-08-21 18:02:19,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667404235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322599956] [2021-08-21 18:02:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:02:19,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:19,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:19,432 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 18:02:19,432 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 18:02:22,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:02:22,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:22,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:02:22,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:23,215 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:02:23,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:02:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:23,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322599956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:23,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:23,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 18:02:23,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523345419] [2021-08-21 18:02:23,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:02:23,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:23,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:02:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:02:23,269 INFO L87 Difference]: Start difference. First operand 745 states and 1276 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:23,604 INFO L93 Difference]: Finished difference Result 1472 states and 2541 transitions. [2021-08-21 18:02:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:02:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:02:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:23,606 INFO L225 Difference]: With dead ends: 1472 [2021-08-21 18:02:23,614 INFO L226 Difference]: Without dead ends: 1454 [2021-08-21 18:02:23,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 599.1ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:02:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-21 18:02:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 773. [2021-08-21 18:02:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.7124352331606219) internal successors, (1322), 772 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1322 transitions. [2021-08-21 18:02:23,622 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1322 transitions. Word has length 36 [2021-08-21 18:02:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:23,622 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1322 transitions. [2021-08-21 18:02:23,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1322 transitions. [2021-08-21 18:02:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:02:23,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:23,623 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:23,650 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 18:02:23,840 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,SelfDestructingSolverStorable62 [2021-08-21 18:02:23,841 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1856858978, now seen corresponding path program 58 times [2021-08-21 18:02:23,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:23,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011969061] [2021-08-21 18:02:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:23,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:02:24,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:24,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011969061] [2021-08-21 18:02:24,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011969061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:24,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897132356] [2021-08-21 18:02:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:24,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:24,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:24,121 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 18:02:24,152 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 18:02:26,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:26,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:26,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:02:26,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:27,944 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:02:27,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:02:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:28,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897132356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:28,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:28,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 18:02:28,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521396937] [2021-08-21 18:02:28,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:02:28,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:28,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:02:28,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:02:28,005 INFO L87 Difference]: Start difference. First operand 773 states and 1322 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:28,532 INFO L93 Difference]: Finished difference Result 1694 states and 2918 transitions. [2021-08-21 18:02:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:02:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:02:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:28,541 INFO L225 Difference]: With dead ends: 1694 [2021-08-21 18:02:28,541 INFO L226 Difference]: Without dead ends: 1676 [2021-08-21 18:02:28,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:02:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-08-21 18:02:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 856. [2021-08-21 18:02:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.7228070175438597) internal successors, (1473), 855 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1473 transitions. [2021-08-21 18:02:28,560 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1473 transitions. Word has length 36 [2021-08-21 18:02:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:28,560 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1473 transitions. [2021-08-21 18:02:28,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1473 transitions. [2021-08-21 18:02:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:02:28,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:28,561 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:28,586 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 18:02:28,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:28,777 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 164294152, now seen corresponding path program 59 times [2021-08-21 18:02:28,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:28,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191182859] [2021-08-21 18:02:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:28,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:02:29,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:29,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191182859] [2021-08-21 18:02:29,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191182859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:29,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931753657] [2021-08-21 18:02:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:29,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:29,059 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 18:02:29,059 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 18:02:32,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:02:32,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:32,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:02:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:32,971 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:02:32,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:02:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931753657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:33,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:33,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 18:02:33,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8669004] [2021-08-21 18:02:33,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:02:33,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:02:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:02:33,027 INFO L87 Difference]: Start difference. First operand 856 states and 1473 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:33,483 INFO L93 Difference]: Finished difference Result 1303 states and 2245 transitions. [2021-08-21 18:02:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:02:33,483 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:02:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:33,485 INFO L225 Difference]: With dead ends: 1303 [2021-08-21 18:02:33,485 INFO L226 Difference]: Without dead ends: 1294 [2021-08-21 18:02:33,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:02:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-08-21 18:02:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 862. [2021-08-21 18:02:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.7224157955865274) internal successors, (1483), 861 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1483 transitions. [2021-08-21 18:02:33,504 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1483 transitions. Word has length 36 [2021-08-21 18:02:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:33,504 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1483 transitions. [2021-08-21 18:02:33,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1483 transitions. [2021-08-21 18:02:33,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:02:33,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:33,505 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:33,531 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 18:02:33,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:33,709 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1800921984, now seen corresponding path program 60 times [2021-08-21 18:02:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:33,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844458587] [2021-08-21 18:02:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:33,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:33,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:33,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844458587] [2021-08-21 18:02:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844458587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:33,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411554444] [2021-08-21 18:02:33,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:33,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:33,999 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 18:02:34,035 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 18:02:37,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:02:37,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:37,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:02:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:38,151 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:02:38,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:02:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411554444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:38,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:38,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:02:38,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778130847] [2021-08-21 18:02:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:02:38,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:02:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:02:38,205 INFO L87 Difference]: Start difference. First operand 862 states and 1483 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:38,567 INFO L93 Difference]: Finished difference Result 1929 states and 3327 transitions. [2021-08-21 18:02:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:02:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:02:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:38,569 INFO L225 Difference]: With dead ends: 1929 [2021-08-21 18:02:38,569 INFO L226 Difference]: Without dead ends: 1893 [2021-08-21 18:02:38,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 695.0ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:02:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-21 18:02:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 902. [2021-08-21 18:02:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 1.7214206437291897) internal successors, (1551), 901 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1551 transitions. [2021-08-21 18:02:38,580 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1551 transitions. Word has length 36 [2021-08-21 18:02:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:38,580 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1551 transitions. [2021-08-21 18:02:38,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1551 transitions. [2021-08-21 18:02:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:02:38,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:38,582 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:38,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:38,806 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,SelfDestructingSolverStorable65 [2021-08-21 18:02:38,807 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1261086954, now seen corresponding path program 61 times [2021-08-21 18:02:38,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:38,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301356287] [2021-08-21 18:02:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:38,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:39,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:39,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301356287] [2021-08-21 18:02:39,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301356287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:39,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309752132] [2021-08-21 18:02:39,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:39,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:39,105 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 18:02:39,139 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 18:02:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:42,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:02:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:43,192 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:02:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:02:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:43,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309752132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:43,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:43,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:02:43,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018627729] [2021-08-21 18:02:43,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:02:43,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:43,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:02:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:02:43,248 INFO L87 Difference]: Start difference. First operand 902 states and 1551 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:43,725 INFO L93 Difference]: Finished difference Result 2014 states and 3478 transitions. [2021-08-21 18:02:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:02:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:02:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:43,728 INFO L225 Difference]: With dead ends: 2014 [2021-08-21 18:02:43,728 INFO L226 Difference]: Without dead ends: 1978 [2021-08-21 18:02:43,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 688.5ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:02:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-08-21 18:02:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 984. [2021-08-21 18:02:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.7243133265513733) internal successors, (1695), 983 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1695 transitions. [2021-08-21 18:02:43,739 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1695 transitions. Word has length 36 [2021-08-21 18:02:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:43,739 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1695 transitions. [2021-08-21 18:02:43,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1695 transitions. [2021-08-21 18:02:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:02:43,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:43,740 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:43,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 18:02:43,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 18:02:43,940 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash 760066176, now seen corresponding path program 62 times [2021-08-21 18:02:43,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:43,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213858900] [2021-08-21 18:02:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:43,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:44,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:44,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213858900] [2021-08-21 18:02:44,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213858900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:44,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722976200] [2021-08-21 18:02:44,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:02:44,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:44,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:44,265 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 18:02:44,265 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 18:02:47,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:02:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:47,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:02:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:48,325 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:02:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:02:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:48,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722976200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:48,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:48,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:02:48,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210696664] [2021-08-21 18:02:48,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:02:48,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:48,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:02:48,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:02:48,381 INFO L87 Difference]: Start difference. First operand 984 states and 1695 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:48,746 INFO L93 Difference]: Finished difference Result 1677 states and 2889 transitions. [2021-08-21 18:02:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:02:48,747 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:02:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:48,748 INFO L225 Difference]: With dead ends: 1677 [2021-08-21 18:02:48,748 INFO L226 Difference]: Without dead ends: 1668 [2021-08-21 18:02:48,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 610.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:02:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-08-21 18:02:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 984. [2021-08-21 18:02:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.7243133265513733) internal successors, (1695), 983 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1695 transitions. [2021-08-21 18:02:48,758 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1695 transitions. Word has length 36 [2021-08-21 18:02:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:48,758 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1695 transitions. [2021-08-21 18:02:48,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1695 transitions. [2021-08-21 18:02:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:02:48,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:48,759 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:48,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 18:02:48,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:48,960 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2090175620, now seen corresponding path program 63 times [2021-08-21 18:02:48,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:48,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423094440] [2021-08-21 18:02:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:48,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:02:49,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:49,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423094440] [2021-08-21 18:02:49,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423094440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:49,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655866753] [2021-08-21 18:02:49,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:02:49,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:49,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:49,232 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 18:02:49,232 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 18:02:52,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:02:52,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:52,491 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:02:52,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:56,471 INFO L354 Elim1Store]: treesize reduction 340, result has 3.7 percent of original size [2021-08-21 18:02:56,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 79 [2021-08-21 18:02:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:56,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655866753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:56,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:56,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-08-21 18:02:56,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993452934] [2021-08-21 18:02:56,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:02:56,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:56,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:02:56,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:02:56,531 INFO L87 Difference]: Start difference. First operand 984 states and 1695 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:07,390 INFO L93 Difference]: Finished difference Result 1534 states and 2601 transitions. [2021-08-21 18:03:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:03:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:03:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:07,392 INFO L225 Difference]: With dead ends: 1534 [2021-08-21 18:03:07,392 INFO L226 Difference]: Without dead ends: 1486 [2021-08-21 18:03:07,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 8219.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1475, Unknown=2, NotChecked=0, Total=1640 [2021-08-21 18:03:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-08-21 18:03:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1113. [2021-08-21 18:03:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 1.724820143884892) internal successors, (1918), 1112 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1918 transitions. [2021-08-21 18:03:07,402 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1918 transitions. Word has length 36 [2021-08-21 18:03:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:07,403 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1918 transitions. [2021-08-21 18:03:07,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1918 transitions. [2021-08-21 18:03:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:03:07,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:07,404 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:07,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:07,604 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,SelfDestructingSolverStorable68 [2021-08-21 18:03:07,604 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2070819046, now seen corresponding path program 64 times [2021-08-21 18:03:07,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:07,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745913648] [2021-08-21 18:03:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:07,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:07,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:07,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745913648] [2021-08-21 18:03:07,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745913648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:07,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288992920] [2021-08-21 18:03:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:03:07,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:07,937 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 18:03:07,987 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 18:03:11,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:03:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:11,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:03:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:12,279 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:03:12,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:03:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:12,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288992920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:12,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:12,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 18:03:12,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727061256] [2021-08-21 18:03:12,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:03:12,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:12,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:03:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:03:12,335 INFO L87 Difference]: Start difference. First operand 1113 states and 1918 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:12,808 INFO L93 Difference]: Finished difference Result 1870 states and 3220 transitions. [2021-08-21 18:03:12,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:03:12,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:03:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:12,810 INFO L225 Difference]: With dead ends: 1870 [2021-08-21 18:03:12,810 INFO L226 Difference]: Without dead ends: 1852 [2021-08-21 18:03:12,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:03:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-08-21 18:03:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1125. [2021-08-21 18:03:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 1.7277580071174377) internal successors, (1942), 1124 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1942 transitions. [2021-08-21 18:03:12,822 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1942 transitions. Word has length 36 [2021-08-21 18:03:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:12,822 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1942 transitions. [2021-08-21 18:03:12,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1942 transitions. [2021-08-21 18:03:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:03:12,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:12,824 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:12,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:13,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:03:13,037 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1372132514, now seen corresponding path program 65 times [2021-08-21 18:03:13,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:13,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18663286] [2021-08-21 18:03:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:13,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:13,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:13,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18663286] [2021-08-21 18:03:13,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18663286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:13,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556841720] [2021-08-21 18:03:13,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:03:13,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:13,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:13,377 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 18:03:13,378 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 18:03:16,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:03:16,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:16,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:03:16,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:17,743 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-21 18:03:17,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-21 18:03:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:17,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556841720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:17,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:17,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-21 18:03:17,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297801435] [2021-08-21 18:03:17,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 18:03:17,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:17,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 18:03:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:03:17,816 INFO L87 Difference]: Start difference. First operand 1125 states and 1942 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:18,349 INFO L93 Difference]: Finished difference Result 1989 states and 3419 transitions. [2021-08-21 18:03:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:03:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:03:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:18,351 INFO L225 Difference]: With dead ends: 1989 [2021-08-21 18:03:18,351 INFO L226 Difference]: Without dead ends: 1971 [2021-08-21 18:03:18,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:03:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-08-21 18:03:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1125. [2021-08-21 18:03:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 1.7277580071174377) internal successors, (1942), 1124 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1942 transitions. [2021-08-21 18:03:18,363 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1942 transitions. Word has length 36 [2021-08-21 18:03:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:18,363 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1942 transitions. [2021-08-21 18:03:18,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1942 transitions. [2021-08-21 18:03:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:03:18,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:18,364 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:18,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 18:03:18,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:18,565 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash 649020616, now seen corresponding path program 66 times [2021-08-21 18:03:18,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:18,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104023599] [2021-08-21 18:03:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:18,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:18,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:18,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104023599] [2021-08-21 18:03:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104023599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:18,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015985793] [2021-08-21 18:03:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:03:18,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:18,893 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 18:03:18,893 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 18:03:22,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:03:22,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:22,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:03:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:25,168 INFO L354 Elim1Store]: treesize reduction 356, result has 3.5 percent of original size [2021-08-21 18:03:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 104 treesize of output 70 [2021-08-21 18:03:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:25,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015985793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:25,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:25,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:03:25,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973471292] [2021-08-21 18:03:25,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:03:25,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:03:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:03:25,228 INFO L87 Difference]: Start difference. First operand 1125 states and 1942 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:35,446 INFO L93 Difference]: Finished difference Result 1981 states and 3398 transitions. [2021-08-21 18:03:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:03:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:03:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:35,449 INFO L225 Difference]: With dead ends: 1981 [2021-08-21 18:03:35,449 INFO L226 Difference]: Without dead ends: 1930 [2021-08-21 18:03:35,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2946.2ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:03:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-08-21 18:03:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1184. [2021-08-21 18:03:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.7455621301775148) internal successors, (2065), 1183 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2065 transitions. [2021-08-21 18:03:35,463 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2065 transitions. Word has length 36 [2021-08-21 18:03:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:35,463 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 2065 transitions. [2021-08-21 18:03:35,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2065 transitions. [2021-08-21 18:03:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:03:35,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:35,464 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:35,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:35,684 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,SelfDestructingSolverStorable71 [2021-08-21 18:03:35,685 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash -902610624, now seen corresponding path program 67 times [2021-08-21 18:03:35,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:35,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806955346] [2021-08-21 18:03:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:35,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:36,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:36,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806955346] [2021-08-21 18:03:36,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806955346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:36,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928829367] [2021-08-21 18:03:36,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:03:36,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:36,061 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 18:03:36,063 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 18:03:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:39,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:03:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:40,613 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:03:40,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:03:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:40,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928829367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:40,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:40,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:03:40,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805625192] [2021-08-21 18:03:40,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:03:40,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:40,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:03:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:03:40,672 INFO L87 Difference]: Start difference. First operand 1184 states and 2065 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:41,049 INFO L93 Difference]: Finished difference Result 1743 states and 3033 transitions. [2021-08-21 18:03:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:03:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:03:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:41,056 INFO L225 Difference]: With dead ends: 1743 [2021-08-21 18:03:41,056 INFO L226 Difference]: Without dead ends: 1734 [2021-08-21 18:03:41,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:03:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-08-21 18:03:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1190. [2021-08-21 18:03:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.7451640033641715) internal successors, (2075), 1189 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2075 transitions. [2021-08-21 18:03:41,068 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2075 transitions. Word has length 36 [2021-08-21 18:03:41,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:41,068 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 2075 transitions. [2021-08-21 18:03:41,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:41,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2075 transitions. [2021-08-21 18:03:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:03:41,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:41,069 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:41,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 18:03:41,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:41,270 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:41,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1141730282, now seen corresponding path program 68 times [2021-08-21 18:03:41,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:41,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935574122] [2021-08-21 18:03:41,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:41,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:03:41,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:41,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935574122] [2021-08-21 18:03:41,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935574122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:41,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43711613] [2021-08-21 18:03:41,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:03:41,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:41,626 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 18:03:41,627 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 18:03:45,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:03:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:45,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:03:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:46,197 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:03:46,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:03:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43711613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:46,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:46,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 18:03:46,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782782021] [2021-08-21 18:03:46,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:03:46,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:46,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:03:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:03:46,234 INFO L87 Difference]: Start difference. First operand 1190 states and 2075 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:46,561 INFO L93 Difference]: Finished difference Result 1829 states and 3175 transitions. [2021-08-21 18:03:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:03:46,561 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:03:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:46,563 INFO L225 Difference]: With dead ends: 1829 [2021-08-21 18:03:46,563 INFO L226 Difference]: Without dead ends: 1802 [2021-08-21 18:03:46,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:03:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-08-21 18:03:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1248. [2021-08-21 18:03:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.744186046511628) internal successors, (2175), 1247 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 2175 transitions. [2021-08-21 18:03:46,576 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 2175 transitions. Word has length 36 [2021-08-21 18:03:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:46,576 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 2175 transitions. [2021-08-21 18:03:46,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 2175 transitions. [2021-08-21 18:03:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:03:46,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:46,578 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:46,604 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 18:03:46,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:46,785 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1681565312, now seen corresponding path program 69 times [2021-08-21 18:03:46,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:46,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875157719] [2021-08-21 18:03:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:46,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:47,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:47,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875157719] [2021-08-21 18:03:47,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875157719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:47,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87402568] [2021-08-21 18:03:47,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:03:47,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:47,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:47,152 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 18:03:47,153 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 18:03:50,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:03:50,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:50,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:03:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:52,597 INFO L354 Elim1Store]: treesize reduction 356, result has 3.5 percent of original size [2021-08-21 18:03:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 104 treesize of output 70 [2021-08-21 18:03:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:52,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87402568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:52,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:52,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:03:52,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32087248] [2021-08-21 18:03:52,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:03:52,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:03:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:03:52,636 INFO L87 Difference]: Start difference. First operand 1248 states and 2175 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:57,272 INFO L93 Difference]: Finished difference Result 2096 states and 3580 transitions. [2021-08-21 18:03:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:03:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:03:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:57,275 INFO L225 Difference]: With dead ends: 2096 [2021-08-21 18:03:57,275 INFO L226 Difference]: Without dead ends: 2027 [2021-08-21 18:03:57,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3874.1ms TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:03:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-08-21 18:03:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1322. [2021-08-21 18:03:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.7464042392127177) internal successors, (2307), 1321 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2307 transitions. [2021-08-21 18:03:57,288 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2307 transitions. Word has length 36 [2021-08-21 18:03:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:57,288 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 2307 transitions. [2021-08-21 18:03:57,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2307 transitions. [2021-08-21 18:03:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:03:57,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:57,289 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:57,317 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 18:03:57,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:57,490 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash -592248854, now seen corresponding path program 70 times [2021-08-21 18:03:57,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:57,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876041680] [2021-08-21 18:03:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:57,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:57,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:57,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876041680] [2021-08-21 18:03:57,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876041680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:57,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785901769] [2021-08-21 18:03:57,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:03:57,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:57,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:57,823 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 18:03:57,823 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 18:04:01,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:04:01,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:01,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:04:01,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:02,525 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:02,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:02,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785901769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:02,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:02,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:04:02,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671249979] [2021-08-21 18:04:02,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:04:02,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:04:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:04:02,562 INFO L87 Difference]: Start difference. First operand 1322 states and 2307 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:02,927 INFO L93 Difference]: Finished difference Result 1820 states and 3158 transitions. [2021-08-21 18:04:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:04:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:02,929 INFO L225 Difference]: With dead ends: 1820 [2021-08-21 18:04:02,929 INFO L226 Difference]: Without dead ends: 1811 [2021-08-21 18:04:02,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:04:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-08-21 18:04:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1322. [2021-08-21 18:04:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.7464042392127177) internal successors, (2307), 1321 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2307 transitions. [2021-08-21 18:04:02,941 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2307 transitions. Word has length 36 [2021-08-21 18:04:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:02,941 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 2307 transitions. [2021-08-21 18:04:02,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2307 transitions. [2021-08-21 18:04:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:02,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:02,943 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:02,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:03,160 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,SelfDestructingSolverStorable75 [2021-08-21 18:04:03,161 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 737860590, now seen corresponding path program 71 times [2021-08-21 18:04:03,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:03,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966853967] [2021-08-21 18:04:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:03,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:04:03,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:03,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966853967] [2021-08-21 18:04:03,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966853967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:03,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846426660] [2021-08-21 18:04:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:04:03,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:03,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:03,476 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 18:04:03,477 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 18:04:07,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:04:07,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:07,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:04:07,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:08,349 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:08,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:08,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846426660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:08,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:08,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 18:04:08,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690738033] [2021-08-21 18:04:08,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:04:08,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:08,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:04:08,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:04:08,384 INFO L87 Difference]: Start difference. First operand 1322 states and 2307 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:08,663 INFO L93 Difference]: Finished difference Result 2008 states and 3450 transitions. [2021-08-21 18:04:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:04:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:08,665 INFO L225 Difference]: With dead ends: 2008 [2021-08-21 18:04:08,665 INFO L226 Difference]: Without dead ends: 1890 [2021-08-21 18:04:08,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 626.8ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-08-21 18:04:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1320. [2021-08-21 18:04:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.7414708112206216) internal successors, (2297), 1319 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2297 transitions. [2021-08-21 18:04:08,678 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2297 transitions. Word has length 36 [2021-08-21 18:04:08,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:08,678 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2297 transitions. [2021-08-21 18:04:08,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2297 transitions. [2021-08-21 18:04:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:08,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:08,680 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:08,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 18:04:08,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:08,894 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:08,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1570519752, now seen corresponding path program 72 times [2021-08-21 18:04:08,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:08,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928527304] [2021-08-21 18:04:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:08,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:09,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:09,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928527304] [2021-08-21 18:04:09,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928527304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:09,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491909416] [2021-08-21 18:04:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:04:09,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:09,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:09,322 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 18:04:09,323 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 18:04:13,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:04:13,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:13,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 18:04:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:14,212 INFO L354 Elim1Store]: treesize reduction 404, result has 3.1 percent of original size [2021-08-21 18:04:14,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 101 treesize of output 59 [2021-08-21 18:04:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:14,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491909416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:14,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:14,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:04:14,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745358002] [2021-08-21 18:04:14,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:04:14,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:14,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:04:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:14,248 INFO L87 Difference]: Start difference. First operand 1320 states and 2297 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:14,729 INFO L93 Difference]: Finished difference Result 2266 states and 3906 transitions. [2021-08-21 18:04:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:04:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:14,732 INFO L225 Difference]: With dead ends: 2266 [2021-08-21 18:04:14,732 INFO L226 Difference]: Without dead ends: 2239 [2021-08-21 18:04:14,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-08-21 18:04:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1352. [2021-08-21 18:04:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 1.7416728349370836) internal successors, (2353), 1351 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2353 transitions. [2021-08-21 18:04:14,745 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2353 transitions. Word has length 36 [2021-08-21 18:04:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:14,745 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 2353 transitions. [2021-08-21 18:04:14,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2353 transitions. [2021-08-21 18:04:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:14,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:14,747 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:14,778 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 18:04:14,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:14,961 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash -703294414, now seen corresponding path program 73 times [2021-08-21 18:04:14,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:14,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536922159] [2021-08-21 18:04:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:14,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:15,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:15,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536922159] [2021-08-21 18:04:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536922159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:15,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463329235] [2021-08-21 18:04:15,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:04:15,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:15,332 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 18:04:15,332 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 18:04:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:19,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:04:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:20,294 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:20,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:20,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463329235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:20,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:20,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:04:20,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408685317] [2021-08-21 18:04:20,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:04:20,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:04:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:20,330 INFO L87 Difference]: Start difference. First operand 1352 states and 2353 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:20,664 INFO L93 Difference]: Finished difference Result 1929 states and 3339 transitions. [2021-08-21 18:04:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:04:20,665 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:20,666 INFO L225 Difference]: With dead ends: 1929 [2021-08-21 18:04:20,666 INFO L226 Difference]: Without dead ends: 1920 [2021-08-21 18:04:20,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-08-21 18:04:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1357. [2021-08-21 18:04:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 1.7418879056047198) internal successors, (2362), 1356 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2362 transitions. [2021-08-21 18:04:20,678 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2362 transitions. Word has length 36 [2021-08-21 18:04:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:20,678 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 2362 transitions. [2021-08-21 18:04:20,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2362 transitions. [2021-08-21 18:04:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:20,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:20,680 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:20,706 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 18:04:20,880 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,SelfDestructingSolverStorable78 [2021-08-21 18:04:20,880 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2040041642, now seen corresponding path program 74 times [2021-08-21 18:04:20,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:20,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481412919] [2021-08-21 18:04:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:20,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:21,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:21,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481412919] [2021-08-21 18:04:21,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481412919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:21,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071847338] [2021-08-21 18:04:21,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:04:21,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:21,253 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 18:04:21,253 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 18:04:25,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:04:25,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:25,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:04:25,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:26,259 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:26,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:26,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071847338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:26,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:26,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:04:26,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518342773] [2021-08-21 18:04:26,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:04:26,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:04:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:26,296 INFO L87 Difference]: Start difference. First operand 1357 states and 2362 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:26,556 INFO L93 Difference]: Finished difference Result 1876 states and 3254 transitions. [2021-08-21 18:04:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:04:26,557 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:26,558 INFO L225 Difference]: With dead ends: 1876 [2021-08-21 18:04:26,559 INFO L226 Difference]: Without dead ends: 1867 [2021-08-21 18:04:26,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 611.2ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-08-21 18:04:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1357. [2021-08-21 18:04:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 1.7418879056047198) internal successors, (2362), 1356 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2362 transitions. [2021-08-21 18:04:26,570 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2362 transitions. Word has length 36 [2021-08-21 18:04:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:26,570 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 2362 transitions. [2021-08-21 18:04:26,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2362 transitions. [2021-08-21 18:04:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:26,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:26,572 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:26,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:04:26,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-21 18:04:26,772 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash -171718396, now seen corresponding path program 75 times [2021-08-21 18:04:26,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:26,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200807737] [2021-08-21 18:04:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:26,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:04:27,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:27,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200807737] [2021-08-21 18:04:27,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200807737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:27,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821902534] [2021-08-21 18:04:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:04:27,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:27,173 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 18:04:27,173 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 18:04:31,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:04:31,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:31,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 18:04:31,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:32,296 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:32,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:32,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821902534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:32,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:32,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 18:04:32,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125056624] [2021-08-21 18:04:32,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:04:32,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:04:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:04:32,332 INFO L87 Difference]: Start difference. First operand 1357 states and 2362 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:32,614 INFO L93 Difference]: Finished difference Result 2028 states and 3465 transitions. [2021-08-21 18:04:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:04:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:32,617 INFO L225 Difference]: With dead ends: 2028 [2021-08-21 18:04:32,617 INFO L226 Difference]: Without dead ends: 1926 [2021-08-21 18:04:32,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:04:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-08-21 18:04:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1417. [2021-08-21 18:04:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 1.7415254237288136) internal successors, (2466), 1416 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2466 transitions. [2021-08-21 18:04:32,629 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2466 transitions. Word has length 36 [2021-08-21 18:04:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:32,629 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2466 transitions. [2021-08-21 18:04:32,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2466 transitions. [2021-08-21 18:04:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:32,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:32,631 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:32,660 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 18:04:32,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:32,831 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:32,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1645690500, now seen corresponding path program 76 times [2021-08-21 18:04:32,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:32,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782555981] [2021-08-21 18:04:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:32,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:33,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:33,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782555981] [2021-08-21 18:04:33,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782555981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:33,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019592443] [2021-08-21 18:04:33,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:04:33,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:33,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:33,207 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 18:04:33,208 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 18:04:37,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:04:37,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:37,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:04:37,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:38,411 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:38,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:38,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019592443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:38,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:38,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:04:38,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627892958] [2021-08-21 18:04:38,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:04:38,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:04:38,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:04:38,446 INFO L87 Difference]: Start difference. First operand 1417 states and 2466 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:38,717 INFO L93 Difference]: Finished difference Result 2577 states and 4489 transitions. [2021-08-21 18:04:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:04:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:38,720 INFO L225 Difference]: With dead ends: 2577 [2021-08-21 18:04:38,720 INFO L226 Difference]: Without dead ends: 2550 [2021-08-21 18:04:38,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:04:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-08-21 18:04:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1412. [2021-08-21 18:04:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 1.739900779588944) internal successors, (2455), 1411 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2455 transitions. [2021-08-21 18:04:38,734 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2455 transitions. Word has length 36 [2021-08-21 18:04:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:38,735 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 2455 transitions. [2021-08-21 18:04:38,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2455 transitions. [2021-08-21 18:04:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:38,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:38,736 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:38,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 18:04:38,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:38,936 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash 660940766, now seen corresponding path program 77 times [2021-08-21 18:04:38,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:38,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820851213] [2021-08-21 18:04:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:38,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:39,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:39,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820851213] [2021-08-21 18:04:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820851213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:39,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046569028] [2021-08-21 18:04:39,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:04:39,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:39,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:39,307 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 18:04:39,308 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 18:04:43,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:04:43,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:43,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:04:43,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:44,599 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:44,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046569028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:44,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:44,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:04:44,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369282533] [2021-08-21 18:04:44,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:04:44,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:04:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:44,634 INFO L87 Difference]: Start difference. First operand 1412 states and 2455 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:45,089 INFO L93 Difference]: Finished difference Result 2374 states and 4114 transitions. [2021-08-21 18:04:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:04:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:45,091 INFO L225 Difference]: With dead ends: 2374 [2021-08-21 18:04:45,092 INFO L226 Difference]: Without dead ends: 2347 [2021-08-21 18:04:45,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-08-21 18:04:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1433. [2021-08-21 18:04:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.7416201117318435) internal successors, (2494), 1432 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2494 transitions. [2021-08-21 18:04:45,105 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2494 transitions. Word has length 36 [2021-08-21 18:04:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:45,105 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 2494 transitions. [2021-08-21 18:04:45,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2494 transitions. [2021-08-21 18:04:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:45,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:45,107 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:45,135 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 18:04:45,307 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,SelfDestructingSolverStorable82 [2021-08-21 18:04:45,308 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1612873400, now seen corresponding path program 78 times [2021-08-21 18:04:45,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:45,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454816955] [2021-08-21 18:04:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:45,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:45,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:45,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454816955] [2021-08-21 18:04:45,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454816955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:45,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117964855] [2021-08-21 18:04:45,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:04:45,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:45,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:45,668 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 18:04:45,669 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 18:04:50,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:04:50,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:50,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:04:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:51,067 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:51,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:51,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117964855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:51,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:51,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:04:51,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859187726] [2021-08-21 18:04:51,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:04:51,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:04:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:51,103 INFO L87 Difference]: Start difference. First operand 1433 states and 2494 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:51,461 INFO L93 Difference]: Finished difference Result 1957 states and 3397 transitions. [2021-08-21 18:04:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:04:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:51,464 INFO L225 Difference]: With dead ends: 1957 [2021-08-21 18:04:51,464 INFO L226 Difference]: Without dead ends: 1948 [2021-08-21 18:04:51,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 620.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-08-21 18:04:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1440. [2021-08-21 18:04:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.7421820708825573) internal successors, (2507), 1439 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2507 transitions. [2021-08-21 18:04:51,476 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2507 transitions. Word has length 36 [2021-08-21 18:04:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:51,476 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 2507 transitions. [2021-08-21 18:04:51,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2507 transitions. [2021-08-21 18:04:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:51,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:51,478 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:51,507 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 18:04:51,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:51,678 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1130462656, now seen corresponding path program 79 times [2021-08-21 18:04:51,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:51,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291234269] [2021-08-21 18:04:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:51,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:52,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:52,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291234269] [2021-08-21 18:04:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291234269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:52,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400738363] [2021-08-21 18:04:52,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:04:52,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:52,123 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 18:04:52,125 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 18:04:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:56,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:04:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:57,505 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:04:57,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:04:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:57,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400738363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:57,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:57,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:04:57,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230622909] [2021-08-21 18:04:57,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:04:57,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:04:57,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:57,540 INFO L87 Difference]: Start difference. First operand 1440 states and 2507 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:57,905 INFO L93 Difference]: Finished difference Result 1915 states and 3329 transitions. [2021-08-21 18:04:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:04:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:04:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:57,907 INFO L225 Difference]: With dead ends: 1915 [2021-08-21 18:04:57,907 INFO L226 Difference]: Without dead ends: 1906 [2021-08-21 18:04:57,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-08-21 18:04:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1440. [2021-08-21 18:04:57,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.7421820708825573) internal successors, (2507), 1439 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2507 transitions. [2021-08-21 18:04:57,928 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2507 transitions. Word has length 36 [2021-08-21 18:04:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:57,928 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 2507 transitions. [2021-08-21 18:04:57,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2507 transitions. [2021-08-21 18:04:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:04:57,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:57,930 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:57,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 18:04:58,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:58,130 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:58,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2133402794, now seen corresponding path program 80 times [2021-08-21 18:04:58,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:58,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061812954] [2021-08-21 18:04:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:58,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:58,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:58,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061812954] [2021-08-21 18:04:58,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061812954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:58,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891878463] [2021-08-21 18:04:58,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:04:58,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:58,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:58,488 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 18:04:58,489 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 18:05:03,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:05:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:03,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:04,195 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:04,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:04,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891878463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:04,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:04,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:05:04,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624579731] [2021-08-21 18:05:04,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:05:04,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:05:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:05:04,236 INFO L87 Difference]: Start difference. First operand 1440 states and 2507 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:04,916 INFO L93 Difference]: Finished difference Result 1859 states and 3233 transitions. [2021-08-21 18:05:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:05:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:04,919 INFO L225 Difference]: With dead ends: 1859 [2021-08-21 18:05:04,919 INFO L226 Difference]: Without dead ends: 1850 [2021-08-21 18:05:04,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:05:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2021-08-21 18:05:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1443. [2021-08-21 18:05:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 1.742024965325936) internal successors, (2512), 1442 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2512 transitions. [2021-08-21 18:05:04,931 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2512 transitions. Word has length 36 [2021-08-21 18:05:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:04,931 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 2512 transitions. [2021-08-21 18:05:04,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2512 transitions. [2021-08-21 18:05:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:04,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:04,933 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:04,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 18:05:05,150 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,SelfDestructingSolverStorable85 [2021-08-21 18:05:05,151 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1436006992, now seen corresponding path program 81 times [2021-08-21 18:05:05,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:05,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825380831] [2021-08-21 18:05:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:05,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:05:05,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:05,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825380831] [2021-08-21 18:05:05,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825380831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:05,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766081532] [2021-08-21 18:05:05,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:05:05,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:05,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:05,550 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 18:05:05,551 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 18:05:10,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:05:10,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:10,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:10,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:11,340 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:11,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:11,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766081532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:11,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:11,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-21 18:05:11,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061234572] [2021-08-21 18:05:11,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:05:11,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:05:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:05:11,418 INFO L87 Difference]: Start difference. First operand 1443 states and 2512 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:12,080 INFO L93 Difference]: Finished difference Result 2953 states and 5155 transitions. [2021-08-21 18:05:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:05:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:12,084 INFO L225 Difference]: With dead ends: 2953 [2021-08-21 18:05:12,084 INFO L226 Difference]: Without dead ends: 2935 [2021-08-21 18:05:12,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 761.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:05:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-08-21 18:05:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 1501. [2021-08-21 18:05:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 1.7386666666666666) internal successors, (2608), 1500 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2608 transitions. [2021-08-21 18:05:12,102 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2608 transitions. Word has length 36 [2021-08-21 18:05:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:12,102 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 2608 transitions. [2021-08-21 18:05:12,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2608 transitions. [2021-08-21 18:05:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:12,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:12,104 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:12,133 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 18:05:12,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:12,305 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2031779016, now seen corresponding path program 82 times [2021-08-21 18:05:12,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:12,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796034679] [2021-08-21 18:05:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:12,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:12,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:12,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796034679] [2021-08-21 18:05:12,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796034679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:12,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918327388] [2021-08-21 18:05:12,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:05:12,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:12,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:12,652 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 18:05:12,652 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 18:05:17,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:05:17,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:17,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:18,481 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:18,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:18,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918327388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:18,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:18,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:05:18,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675378262] [2021-08-21 18:05:18,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:05:18,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:05:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:05:18,539 INFO L87 Difference]: Start difference. First operand 1501 states and 2608 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:19,204 INFO L93 Difference]: Finished difference Result 2989 states and 5209 transitions. [2021-08-21 18:05:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:05:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:19,207 INFO L225 Difference]: With dead ends: 2989 [2021-08-21 18:05:19,208 INFO L226 Difference]: Without dead ends: 2971 [2021-08-21 18:05:19,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 737.4ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:05:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-08-21 18:05:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 1570. [2021-08-21 18:05:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 1.7380497131931167) internal successors, (2727), 1569 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2727 transitions. [2021-08-21 18:05:19,235 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2727 transitions. Word has length 36 [2021-08-21 18:05:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:19,235 INFO L470 AbstractCegarLoop]: Abstraction has 1570 states and 2727 transitions. [2021-08-21 18:05:19,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2727 transitions. [2021-08-21 18:05:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:19,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:19,237 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:19,265 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 18:05:19,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:19,437 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1920733456, now seen corresponding path program 83 times [2021-08-21 18:05:19,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:19,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744500932] [2021-08-21 18:05:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:19,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:19,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744500932] [2021-08-21 18:05:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744500932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:19,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547410428] [2021-08-21 18:05:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:05:19,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:19,842 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 18:05:19,844 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 18:05:24,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:05:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:24,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:25,716 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:25,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:25,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547410428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:25,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:25,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:05:25,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853587531] [2021-08-21 18:05:25,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:05:25,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:05:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:05:25,792 INFO L87 Difference]: Start difference. First operand 1570 states and 2727 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:26,583 INFO L93 Difference]: Finished difference Result 3010 states and 5238 transitions. [2021-08-21 18:05:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:05:26,584 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:26,587 INFO L225 Difference]: With dead ends: 3010 [2021-08-21 18:05:26,587 INFO L226 Difference]: Without dead ends: 2992 [2021-08-21 18:05:26,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 790.1ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:05:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-08-21 18:05:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1616. [2021-08-21 18:05:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 1.736842105263158) internal successors, (2805), 1615 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2805 transitions. [2021-08-21 18:05:26,603 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2805 transitions. Word has length 36 [2021-08-21 18:05:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 2805 transitions. [2021-08-21 18:05:26,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:26,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2805 transitions. [2021-08-21 18:05:26,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:26,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:26,605 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:26,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 18:05:26,805 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,SelfDestructingSolverStorable88 [2021-08-21 18:05:26,805 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:26,806 INFO L82 PathProgramCache]: Analyzing trace with hash 369102216, now seen corresponding path program 84 times [2021-08-21 18:05:26,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:26,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152929356] [2021-08-21 18:05:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:26,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:27,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:27,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152929356] [2021-08-21 18:05:27,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152929356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:27,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231309629] [2021-08-21 18:05:27,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:05:27,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:27,163 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 18:05:27,163 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 18:05:32,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:05:32,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:32,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:33,117 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:33,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:33,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231309629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:33,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:33,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-21 18:05:33,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025054718] [2021-08-21 18:05:33,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:05:33,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:05:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:05:33,181 INFO L87 Difference]: Start difference. First operand 1616 states and 2805 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:33,948 INFO L93 Difference]: Finished difference Result 2969 states and 5179 transitions. [2021-08-21 18:05:33,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:05:33,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:33,952 INFO L225 Difference]: With dead ends: 2969 [2021-08-21 18:05:33,952 INFO L226 Difference]: Without dead ends: 2951 [2021-08-21 18:05:33,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:05:33,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-08-21 18:05:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 1631. [2021-08-21 18:05:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 1.7361963190184049) internal successors, (2830), 1630 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2830 transitions. [2021-08-21 18:05:33,968 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2830 transitions. Word has length 36 [2021-08-21 18:05:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:33,969 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2830 transitions. [2021-08-21 18:05:33,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2830 transitions. [2021-08-21 18:05:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:33,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:33,970 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:34,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:05:34,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:34,171 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash 679463986, now seen corresponding path program 85 times [2021-08-21 18:05:34,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:34,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387488769] [2021-08-21 18:05:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:34,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:34,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:34,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387488769] [2021-08-21 18:05:34,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387488769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:34,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949495176] [2021-08-21 18:05:34,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:05:34,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:34,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:34,592 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 18:05:34,592 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 18:05:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:39,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:40,641 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:40,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949495176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:40,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:40,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:05:40,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70226470] [2021-08-21 18:05:40,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:05:40,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:40,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:05:40,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:05:40,676 INFO L87 Difference]: Start difference. First operand 1631 states and 2830 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:41,087 INFO L93 Difference]: Finished difference Result 2508 states and 4336 transitions. [2021-08-21 18:05:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:05:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:41,093 INFO L225 Difference]: With dead ends: 2508 [2021-08-21 18:05:41,093 INFO L226 Difference]: Without dead ends: 2481 [2021-08-21 18:05:41,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 613.1ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:05:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-08-21 18:05:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1625. [2021-08-21 18:05:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 1.7364532019704433) internal successors, (2820), 1624 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2820 transitions. [2021-08-21 18:05:41,109 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2820 transitions. Word has length 36 [2021-08-21 18:05:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:41,109 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 2820 transitions. [2021-08-21 18:05:41,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2820 transitions. [2021-08-21 18:05:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:41,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:41,110 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:41,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 18:05:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:41,311 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash 568418426, now seen corresponding path program 86 times [2021-08-21 18:05:41,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:41,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641200109] [2021-08-21 18:05:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:41,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:41,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:41,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641200109] [2021-08-21 18:05:41,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641200109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:41,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935627875] [2021-08-21 18:05:41,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:05:41,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:41,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:41,758 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 18:05:41,758 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 18:05:46,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:05:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:46,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:46,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:47,803 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:47,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:47,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935627875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:47,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:47,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:05:47,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250251047] [2021-08-21 18:05:47,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:05:47,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:05:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:05:47,847 INFO L87 Difference]: Start difference. First operand 1625 states and 2820 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:48,216 INFO L93 Difference]: Finished difference Result 2498 states and 4314 transitions. [2021-08-21 18:05:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:05:48,216 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:48,218 INFO L225 Difference]: With dead ends: 2498 [2021-08-21 18:05:48,218 INFO L226 Difference]: Without dead ends: 2471 [2021-08-21 18:05:48,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:05:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-21 18:05:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1623. [2021-08-21 18:05:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 1.7361282367447595) internal successors, (2816), 1622 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2816 transitions. [2021-08-21 18:05:48,234 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2816 transitions. Word has length 36 [2021-08-21 18:05:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:48,235 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 2816 transitions. [2021-08-21 18:05:48,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2816 transitions. [2021-08-21 18:05:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:48,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:48,236 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:48,267 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 18:05:48,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:48,449 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash -983212814, now seen corresponding path program 87 times [2021-08-21 18:05:48,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:48,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119236295] [2021-08-21 18:05:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:48,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:48,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:48,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119236295] [2021-08-21 18:05:48,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119236295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:48,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014994003] [2021-08-21 18:05:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:05:48,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:48,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:48,808 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 18:05:48,808 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 18:05:54,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:05:54,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:54,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:05:54,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:55,092 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:05:55,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:05:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014994003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:55,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:55,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:05:55,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833174862] [2021-08-21 18:05:55,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:05:55,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:55,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:05:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:05:55,127 INFO L87 Difference]: Start difference. First operand 1623 states and 2816 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:55,529 INFO L93 Difference]: Finished difference Result 2583 states and 4475 transitions. [2021-08-21 18:05:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:05:55,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:05:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:55,532 INFO L225 Difference]: With dead ends: 2583 [2021-08-21 18:05:55,532 INFO L226 Difference]: Without dead ends: 2556 [2021-08-21 18:05:55,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:05:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-08-21 18:05:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1643. [2021-08-21 18:05:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 1.7356881851400732) internal successors, (2850), 1642 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2850 transitions. [2021-08-21 18:05:55,547 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2850 transitions. Word has length 36 [2021-08-21 18:05:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:55,547 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2850 transitions. [2021-08-21 18:05:55,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2850 transitions. [2021-08-21 18:05:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:05:55,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:55,549 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:55,581 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 18:05:55,770 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,SelfDestructingSolverStorable92 [2021-08-21 18:05:55,770 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:05:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash -341160560, now seen corresponding path program 88 times [2021-08-21 18:05:55,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:55,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881096007] [2021-08-21 18:05:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:55,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:56,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:56,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881096007] [2021-08-21 18:05:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881096007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:56,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490553900] [2021-08-21 18:05:56,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:05:56,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:56,173 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 18:05:56,174 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 18:06:01,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:01,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:01,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:06:01,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:02,234 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:06:02,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:06:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:02,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490553900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:02,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:02,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:06:02,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289321145] [2021-08-21 18:06:02,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:06:02,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:06:02,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:06:02,279 INFO L87 Difference]: Start difference. First operand 1643 states and 2850 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:02,756 INFO L93 Difference]: Finished difference Result 2474 states and 4279 transitions. [2021-08-21 18:06:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:06:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:02,758 INFO L225 Difference]: With dead ends: 2474 [2021-08-21 18:06:02,759 INFO L226 Difference]: Without dead ends: 2456 [2021-08-21 18:06:02,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 628.8ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:06:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-08-21 18:06:02,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1639. [2021-08-21 18:06:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.735042735042735) internal successors, (2842), 1638 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2842 transitions. [2021-08-21 18:06:02,773 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2842 transitions. Word has length 36 [2021-08-21 18:06:02,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:02,773 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2842 transitions. [2021-08-21 18:06:02,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2842 transitions. [2021-08-21 18:06:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:02,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:02,775 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:02,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 18:06:02,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:02,976 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1892791800, now seen corresponding path program 89 times [2021-08-21 18:06:02,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:02,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517493239] [2021-08-21 18:06:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:02,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:03,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:03,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517493239] [2021-08-21 18:06:03,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517493239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:03,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922765987] [2021-08-21 18:06:03,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:03,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:03,395 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 18:06:03,424 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 18:06:08,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:06:08,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:08,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:06:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:09,574 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:06:09,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:06:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:09,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922765987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:09,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:09,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:06:09,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189799861] [2021-08-21 18:06:09,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:06:09,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:06:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:06:09,608 INFO L87 Difference]: Start difference. First operand 1639 states and 2842 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:10,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:10,130 INFO L93 Difference]: Finished difference Result 2380 states and 4120 transitions. [2021-08-21 18:06:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:06:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:10,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:10,133 INFO L225 Difference]: With dead ends: 2380 [2021-08-21 18:06:10,133 INFO L226 Difference]: Without dead ends: 2371 [2021-08-21 18:06:10,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 664.7ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:06:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-08-21 18:06:10,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1642. [2021-08-21 18:06:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.7349177330895795) internal successors, (2847), 1641 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2847 transitions. [2021-08-21 18:06:10,147 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2847 transitions. Word has length 36 [2021-08-21 18:06:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:10,148 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2847 transitions. [2021-08-21 18:06:10,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2847 transitions. [2021-08-21 18:06:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:10,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:10,149 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:10,180 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 18:06:10,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:10,365 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash -889851662, now seen corresponding path program 90 times [2021-08-21 18:06:10,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:10,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829875433] [2021-08-21 18:06:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:10,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:10,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:10,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829875433] [2021-08-21 18:06:10,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829875433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:10,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572814824] [2021-08-21 18:06:10,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:06:10,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:10,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:10,758 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 18:06:10,759 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 18:06:15,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:06:15,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:15,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:06:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:16,951 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:06:16,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:06:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:16,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572814824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:16,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:16,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:06:16,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259321885] [2021-08-21 18:06:16,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:06:16,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:06:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:06:16,987 INFO L87 Difference]: Start difference. First operand 1642 states and 2847 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:17,523 INFO L93 Difference]: Finished difference Result 2384 states and 4128 transitions. [2021-08-21 18:06:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:06:17,523 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:17,526 INFO L225 Difference]: With dead ends: 2384 [2021-08-21 18:06:17,526 INFO L226 Difference]: Without dead ends: 2375 [2021-08-21 18:06:17,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:06:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-08-21 18:06:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1639. [2021-08-21 18:06:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.735042735042735) internal successors, (2842), 1638 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2842 transitions. [2021-08-21 18:06:17,541 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2842 transitions. Word has length 36 [2021-08-21 18:06:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:17,541 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2842 transitions. [2021-08-21 18:06:17,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2842 transitions. [2021-08-21 18:06:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:17,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:17,543 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:17,577 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 18:06:17,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:17,746 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:17,746 INFO L82 PathProgramCache]: Analyzing trace with hash -417104918, now seen corresponding path program 91 times [2021-08-21 18:06:17,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:17,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718598919] [2021-08-21 18:06:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:17,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:06:18,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:18,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718598919] [2021-08-21 18:06:18,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718598919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:18,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107919145] [2021-08-21 18:06:18,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:06:18,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:18,113 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 18:06:18,114 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 18:06:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:23,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:06:23,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:24,356 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:06:24,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:06:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:24,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107919145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:24,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:24,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 18:06:24,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728482394] [2021-08-21 18:06:24,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:06:24,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:24,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:06:24,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:06:24,390 INFO L87 Difference]: Start difference. First operand 1639 states and 2842 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:24,835 INFO L93 Difference]: Finished difference Result 2678 states and 4596 transitions. [2021-08-21 18:06:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:06:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:24,838 INFO L225 Difference]: With dead ends: 2678 [2021-08-21 18:06:24,838 INFO L226 Difference]: Without dead ends: 2573 [2021-08-21 18:06:24,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:06:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-08-21 18:06:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1667. [2021-08-21 18:06:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 1.7334933973589435) internal successors, (2888), 1666 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2888 transitions. [2021-08-21 18:06:24,854 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2888 transitions. Word has length 36 [2021-08-21 18:06:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:24,854 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2888 transitions. [2021-08-21 18:06:24,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2888 transitions. [2021-08-21 18:06:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:24,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:24,856 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:24,888 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 18:06:25,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:25,068 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:25,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash -887440184, now seen corresponding path program 92 times [2021-08-21 18:06:25,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:25,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838518501] [2021-08-21 18:06:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:25,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:25,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:25,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838518501] [2021-08-21 18:06:25,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838518501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:25,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917190863] [2021-08-21 18:06:25,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:06:25,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:25,394 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 18:06:25,395 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 18:06:30,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:06:30,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:30,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:06:30,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:31,796 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:06:31,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:06:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917190863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:31,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:31,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 18:06:31,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841902339] [2021-08-21 18:06:31,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:06:31,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:06:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:06:31,831 INFO L87 Difference]: Start difference. First operand 1667 states and 2888 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:32,381 INFO L93 Difference]: Finished difference Result 2633 states and 4495 transitions. [2021-08-21 18:06:32,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:06:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:32,384 INFO L225 Difference]: With dead ends: 2633 [2021-08-21 18:06:32,384 INFO L226 Difference]: Without dead ends: 2516 [2021-08-21 18:06:32,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:06:32,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-08-21 18:06:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1663. [2021-08-21 18:06:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 1.7316486161251505) internal successors, (2878), 1662 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2878 transitions. [2021-08-21 18:06:32,400 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2878 transitions. Word has length 36 [2021-08-21 18:06:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:32,400 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2878 transitions. [2021-08-21 18:06:32,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2878 transitions. [2021-08-21 18:06:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:32,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:32,402 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:32,433 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 18:06:32,602 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,SelfDestructingSolverStorable97 [2021-08-21 18:06:32,602 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1985728682, now seen corresponding path program 93 times [2021-08-21 18:06:32,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:32,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461704232] [2021-08-21 18:06:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:32,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:32,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:32,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461704232] [2021-08-21 18:06:32,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461704232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:32,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704675956] [2021-08-21 18:06:32,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:06:32,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:32,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:32,944 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 18:06:32,944 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 18:06:38,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:06:38,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:38,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:06:38,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:39,456 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:06:39,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:06:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704675956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:39,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:39,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:06:39,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495830672] [2021-08-21 18:06:39,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:06:39,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:39,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:06:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:06:39,492 INFO L87 Difference]: Start difference. First operand 1663 states and 2878 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:40,019 INFO L93 Difference]: Finished difference Result 2325 states and 4023 transitions. [2021-08-21 18:06:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:06:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:40,021 INFO L225 Difference]: With dead ends: 2325 [2021-08-21 18:06:40,022 INFO L226 Difference]: Without dead ends: 2298 [2021-08-21 18:06:40,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:06:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-21 18:06:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1660. [2021-08-21 18:06:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 1.7317661241711875) internal successors, (2873), 1659 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2873 transitions. [2021-08-21 18:06:40,036 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2873 transitions. Word has length 36 [2021-08-21 18:06:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:40,036 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 2873 transitions. [2021-08-21 18:06:40,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2873 transitions. [2021-08-21 18:06:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:40,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:40,038 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:40,070 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 18:06:40,238 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,SelfDestructingSolverStorable98 [2021-08-21 18:06:40,238 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash -998485744, now seen corresponding path program 94 times [2021-08-21 18:06:40,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:40,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784397643] [2021-08-21 18:06:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:40,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:40,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784397643] [2021-08-21 18:06:40,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784397643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:40,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069307725] [2021-08-21 18:06:40,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:06:40,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:40,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:40,600 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 18:06:40,600 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 18:06:46,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:46,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:46,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:06:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:47,123 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:06:47,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:06:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:47,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069307725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:47,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:47,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:06:47,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837285209] [2021-08-21 18:06:47,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:06:47,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:06:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:06:47,157 INFO L87 Difference]: Start difference. First operand 1660 states and 2873 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:47,800 INFO L93 Difference]: Finished difference Result 2619 states and 4469 transitions. [2021-08-21 18:06:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:06:47,801 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:47,803 INFO L225 Difference]: With dead ends: 2619 [2021-08-21 18:06:47,803 INFO L226 Difference]: Without dead ends: 2508 [2021-08-21 18:06:47,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 849.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:06:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-08-21 18:06:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 1680. [2021-08-21 18:06:47,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 1.7325789160214413) internal successors, (2909), 1679 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2909 transitions. [2021-08-21 18:06:47,818 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2909 transitions. Word has length 36 [2021-08-21 18:06:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:47,818 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2909 transitions. [2021-08-21 18:06:47,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2909 transitions. [2021-08-21 18:06:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:47,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:47,820 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:47,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 18:06:48,020 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,SelfDestructingSolverStorable99 [2021-08-21 18:06:48,020 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1874683122, now seen corresponding path program 95 times [2021-08-21 18:06:48,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:48,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853416744] [2021-08-21 18:06:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:48,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:48,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:48,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853416744] [2021-08-21 18:06:48,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853416744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:48,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777066560] [2021-08-21 18:06:48,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:48,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:48,441 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 18:06:48,441 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 18:06:53,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:06:54,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:54,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:06:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:55,019 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-21 18:06:55,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-21 18:06:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:55,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777066560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:55,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:55,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-21 18:06:55,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793879411] [2021-08-21 18:06:55,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:06:55,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:06:55,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:06:55,079 INFO L87 Difference]: Start difference. First operand 1680 states and 2909 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:56,943 INFO L93 Difference]: Finished difference Result 2445 states and 4198 transitions. [2021-08-21 18:06:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:06:56,944 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:06:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:56,946 INFO L225 Difference]: With dead ends: 2445 [2021-08-21 18:06:56,946 INFO L226 Difference]: Without dead ends: 2367 [2021-08-21 18:06:56,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1758.2ms TimeCoverageRelationStatistics Valid=264, Invalid=2928, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:06:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-21 18:06:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1728. [2021-08-21 18:06:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.7353792704111175) internal successors, (2997), 1727 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2997 transitions. [2021-08-21 18:06:56,960 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2997 transitions. Word has length 36 [2021-08-21 18:06:56,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:56,961 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2997 transitions. [2021-08-21 18:06:56,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2997 transitions. [2021-08-21 18:06:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:06:56,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:56,962 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:56,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:06:57,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:57,163 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:06:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash 323051882, now seen corresponding path program 96 times [2021-08-21 18:06:57,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:57,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497826406] [2021-08-21 18:06:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:57,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:57,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:57,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497826406] [2021-08-21 18:06:57,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497826406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:57,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745984536] [2021-08-21 18:06:57,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:06:57,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:57,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:57,554 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 18:06:57,554 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 18:07:03,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:07:03,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:03,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:07:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:04,197 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:07:04,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:07:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:04,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745984536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:04,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:04,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:07:04,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697644818] [2021-08-21 18:07:04,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:07:04,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:07:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:07:04,232 INFO L87 Difference]: Start difference. First operand 1728 states and 2997 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:04,564 INFO L93 Difference]: Finished difference Result 2255 states and 3905 transitions. [2021-08-21 18:07:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:07:04,564 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:07:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:04,566 INFO L225 Difference]: With dead ends: 2255 [2021-08-21 18:07:04,566 INFO L226 Difference]: Without dead ends: 2246 [2021-08-21 18:07:04,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 615.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:07:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-08-21 18:07:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1728. [2021-08-21 18:07:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.7353792704111175) internal successors, (2997), 1727 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2997 transitions. [2021-08-21 18:07:04,581 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2997 transitions. Word has length 36 [2021-08-21 18:07:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:04,581 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2997 transitions. [2021-08-21 18:07:04,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2997 transitions. [2021-08-21 18:07:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:07:04,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:04,582 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:04,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 18:07:04,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 18:07:04,783 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:07:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1888708156, now seen corresponding path program 97 times [2021-08-21 18:07:04,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:04,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652830815] [2021-08-21 18:07:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:04,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:07:05,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:05,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652830815] [2021-08-21 18:07:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652830815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:05,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454784862] [2021-08-21 18:07:05,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:07:05,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:05,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:05,133 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 18:07:05,136 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 18:07:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:10,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:07:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:11,969 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:07:11,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:07:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:12,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454784862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:12,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:12,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 18:07:12,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008689865] [2021-08-21 18:07:12,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:07:12,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:12,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:07:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:07:12,005 INFO L87 Difference]: Start difference. First operand 1728 states and 2997 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:12,509 INFO L93 Difference]: Finished difference Result 2458 states and 4210 transitions. [2021-08-21 18:07:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:07:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:07:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:12,511 INFO L225 Difference]: With dead ends: 2458 [2021-08-21 18:07:12,511 INFO L226 Difference]: Without dead ends: 2347 [2021-08-21 18:07:12,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 685.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:07:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-08-21 18:07:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1803. [2021-08-21 18:07:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 1.7358490566037736) internal successors, (3128), 1802 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3128 transitions. [2021-08-21 18:07:12,526 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3128 transitions. Word has length 36 [2021-08-21 18:07:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:12,527 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3128 transitions. [2021-08-21 18:07:12,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3128 transitions. [2021-08-21 18:07:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:07:12,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:12,528 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:12,560 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 18:07:12,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:12,729 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:07:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash 932287036, now seen corresponding path program 98 times [2021-08-21 18:07:12,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:12,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887380835] [2021-08-21 18:07:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:12,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:13,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:13,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887380835] [2021-08-21 18:07:13,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887380835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:13,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028112036] [2021-08-21 18:07:13,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:07:13,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:13,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:13,099 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 18:07:13,099 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 18:07:18,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:07:18,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:18,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:07:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:19,933 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:07:19,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:07:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:19,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028112036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:19,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:19,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:07:19,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446463307] [2021-08-21 18:07:19,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:07:19,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:07:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:07:19,968 INFO L87 Difference]: Start difference. First operand 1803 states and 3128 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:20,286 INFO L93 Difference]: Finished difference Result 3214 states and 5596 transitions. [2021-08-21 18:07:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:07:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:07:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:20,290 INFO L225 Difference]: With dead ends: 3214 [2021-08-21 18:07:20,290 INFO L226 Difference]: Without dead ends: 3187 [2021-08-21 18:07:20,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:07:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-08-21 18:07:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1747. [2021-08-21 18:07:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.7353951890034365) internal successors, (3030), 1746 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3030 transitions. [2021-08-21 18:07:20,309 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3030 transitions. Word has length 36 [2021-08-21 18:07:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:20,309 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 3030 transitions. [2021-08-21 18:07:20,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3030 transitions. [2021-08-21 18:07:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:07:20,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:20,311 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:20,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 18:07:20,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 18:07:20,511 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:07:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash 965104136, now seen corresponding path program 99 times [2021-08-21 18:07:20,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:20,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805796731] [2021-08-21 18:07:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:20,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:20,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:20,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805796731] [2021-08-21 18:07:20,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805796731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:20,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679923447] [2021-08-21 18:07:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:07:20,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:20,930 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 18:07:20,930 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 18:07:26,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:07:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:26,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:07:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:28,099 INFO L354 Elim1Store]: treesize reduction 372, result has 3.4 percent of original size [2021-08-21 18:07:28,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 105 treesize of output 69 [2021-08-21 18:07:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:28,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679923447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:28,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:28,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:07:28,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004709423] [2021-08-21 18:07:28,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:07:28,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:28,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:07:28,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:07:28,134 INFO L87 Difference]: Start difference. First operand 1747 states and 3030 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:29,797 INFO L93 Difference]: Finished difference Result 2616 states and 4517 transitions. [2021-08-21 18:07:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:07:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:07:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:29,800 INFO L225 Difference]: With dead ends: 2616 [2021-08-21 18:07:29,800 INFO L226 Difference]: Without dead ends: 2538 [2021-08-21 18:07:29,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 865.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:07:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-08-21 18:07:29,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1798. [2021-08-21 18:07:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 1.7390094602114636) internal successors, (3125), 1797 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 3125 transitions. [2021-08-21 18:07:29,815 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 3125 transitions. Word has length 36 [2021-08-21 18:07:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:29,815 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 3125 transitions. [2021-08-21 18:07:29,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 3125 transitions. [2021-08-21 18:07:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:07:29,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:29,817 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:29,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 18:07:30,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:30,018 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:07:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash -586527104, now seen corresponding path program 100 times [2021-08-21 18:07:30,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:30,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138224963] [2021-08-21 18:07:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:30,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:30,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138224963] [2021-08-21 18:07:30,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138224963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884685606] [2021-08-21 18:07:30,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:07:30,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:30,392 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 18:07:30,392 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 18:07:36,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:07:36,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:36,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:07:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:37,427 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:07:37,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:07:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:37,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884685606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:37,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:37,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:07:37,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481272665] [2021-08-21 18:07:37,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:07:37,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:07:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:07:37,461 INFO L87 Difference]: Start difference. First operand 1798 states and 3125 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:37,859 INFO L93 Difference]: Finished difference Result 2336 states and 4062 transitions. [2021-08-21 18:07:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:07:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:07:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:37,862 INFO L225 Difference]: With dead ends: 2336 [2021-08-21 18:07:37,862 INFO L226 Difference]: Without dead ends: 2327 [2021-08-21 18:07:37,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:07:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-08-21 18:07:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 1803. [2021-08-21 18:07:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 1.7391786903440623) internal successors, (3134), 1802 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3134 transitions. [2021-08-21 18:07:37,878 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3134 transitions. Word has length 36 [2021-08-21 18:07:37,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:37,879 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3134 transitions. [2021-08-21 18:07:37,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:37,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3134 transitions. [2021-08-21 18:07:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:07:37,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:37,880 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:37,913 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 18:07:38,080 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,SelfDestructingSolverStorable105 [2021-08-21 18:07:38,081 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:07:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:38,081 INFO L82 PathProgramCache]: Analyzing trace with hash 416413034, now seen corresponding path program 101 times [2021-08-21 18:07:38,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:38,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193019443] [2021-08-21 18:07:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:38,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:38,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:38,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193019443] [2021-08-21 18:07:38,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193019443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:38,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585980003] [2021-08-21 18:07:38,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:07:38,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:38,477 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 18:07:38,477 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 18:07:44,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:07:44,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:44,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:07:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:45,561 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:07:45,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:07:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585980003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:45,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:07:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854535621] [2021-08-21 18:07:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:07:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:07:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:07:45,596 INFO L87 Difference]: Start difference. First operand 1803 states and 3134 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:46,004 INFO L93 Difference]: Finished difference Result 2343 states and 4075 transitions. [2021-08-21 18:07:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:07:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:07:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:46,006 INFO L225 Difference]: With dead ends: 2343 [2021-08-21 18:07:46,006 INFO L226 Difference]: Without dead ends: 2334 [2021-08-21 18:07:46,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:07:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-08-21 18:07:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1803. [2021-08-21 18:07:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 1.7391786903440623) internal successors, (3134), 1802 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3134 transitions. [2021-08-21 18:07:46,020 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3134 transitions. Word has length 36 [2021-08-21 18:07:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:46,021 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3134 transitions. [2021-08-21 18:07:46,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3134 transitions. [2021-08-21 18:07:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:07:46,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:46,022 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:46,055 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 18:07:46,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:46,222 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:07:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1229308916, now seen corresponding path program 102 times [2021-08-21 18:07:46,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:46,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368249029] [2021-08-21 18:07:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:46,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:07:46,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:46,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368249029] [2021-08-21 18:07:46,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368249029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:46,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234989569] [2021-08-21 18:07:46,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:07:46,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:46,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:46,616 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 18:07:46,616 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 18:07:52,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:07:52,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:52,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:07:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:53,706 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:07:53,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:07:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:53,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234989569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:53,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:53,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-21 18:07:53,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486267978] [2021-08-21 18:07:53,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:07:53,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:07:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:07:53,753 INFO L87 Difference]: Start difference. First operand 1803 states and 3134 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:54,122 INFO L93 Difference]: Finished difference Result 2503 states and 4311 transitions. [2021-08-21 18:07:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:07:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:07:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:54,125 INFO L225 Difference]: With dead ends: 2503 [2021-08-21 18:07:54,125 INFO L226 Difference]: Without dead ends: 2410 [2021-08-21 18:07:54,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 706.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:07:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-08-21 18:07:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1875. [2021-08-21 18:07:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.7406616862326574) internal successors, (3262), 1874 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 3262 transitions. [2021-08-21 18:07:54,143 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 3262 transitions. Word has length 36 [2021-08-21 18:07:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:54,143 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 3262 transitions. [2021-08-21 18:07:54,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 3262 transitions. [2021-08-21 18:07:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:07:54,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:54,145 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:54,179 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 18:07:54,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:54,361 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:07:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1591686276, now seen corresponding path program 103 times [2021-08-21 18:07:54,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:54,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746250820] [2021-08-21 18:07:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:54,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:54,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:54,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746250820] [2021-08-21 18:07:54,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746250820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:54,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688932972] [2021-08-21 18:07:54,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:07:54,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:54,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:54,746 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 18:07:54,746 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 18:08:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:00,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:08:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:01,958 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:08:01,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:08:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:01,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688932972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:01,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:01,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:08:01,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220215928] [2021-08-21 18:08:01,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:08:01,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:08:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:08:01,993 INFO L87 Difference]: Start difference. First operand 1875 states and 3262 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:02,403 INFO L93 Difference]: Finished difference Result 2860 states and 4982 transitions. [2021-08-21 18:08:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:08:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:08:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:02,406 INFO L225 Difference]: With dead ends: 2860 [2021-08-21 18:08:02,406 INFO L226 Difference]: Without dead ends: 2833 [2021-08-21 18:08:02,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:08:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-08-21 18:08:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1867. [2021-08-21 18:08:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.7395498392282958) internal successors, (3246), 1866 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3246 transitions. [2021-08-21 18:08:02,422 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3246 transitions. Word has length 36 [2021-08-21 18:08:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:02,423 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 3246 transitions. [2021-08-21 18:08:02,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3246 transitions. [2021-08-21 18:08:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:08:02,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:02,424 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:02,456 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 18:08:02,624 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,SelfDestructingSolverStorable108 [2021-08-21 18:08:02,625 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:08:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1248665490, now seen corresponding path program 104 times [2021-08-21 18:08:02,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:02,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499575458] [2021-08-21 18:08:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:02,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:02,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:02,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499575458] [2021-08-21 18:08:02,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499575458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:02,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304342455] [2021-08-21 18:08:02,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:08:02,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:02,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:02,988 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 18:08:02,989 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 18:08:09,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:08:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:09,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:08:09,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:10,289 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:08:10,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:08:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:10,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304342455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:10,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:10,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:08:10,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301998613] [2021-08-21 18:08:10,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:08:10,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:10,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:08:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:08:10,323 INFO L87 Difference]: Start difference. First operand 1867 states and 3246 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:10,708 INFO L93 Difference]: Finished difference Result 2796 states and 4862 transitions. [2021-08-21 18:08:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:08:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:08:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:10,711 INFO L225 Difference]: With dead ends: 2796 [2021-08-21 18:08:10,711 INFO L226 Difference]: Without dead ends: 2769 [2021-08-21 18:08:10,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 610.1ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:08:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-08-21 18:08:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1880. [2021-08-21 18:08:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 1.739755188930282) internal successors, (3269), 1879 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 3269 transitions. [2021-08-21 18:08:10,727 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 3269 transitions. Word has length 36 [2021-08-21 18:08:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:10,727 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 3269 transitions. [2021-08-21 18:08:10,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 3269 transitions. [2021-08-21 18:08:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:08:10,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:10,729 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:10,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 18:08:10,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:10,930 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:08:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1624503376, now seen corresponding path program 105 times [2021-08-21 18:08:10,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:10,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369116521] [2021-08-21 18:08:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:10,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:11,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:11,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369116521] [2021-08-21 18:08:11,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369116521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:11,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684145700] [2021-08-21 18:08:11,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:08:11,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:11,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:11,317 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 18:08:11,317 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 18:08:17,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:08:17,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:17,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:08:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:18,869 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:08:18,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:08:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:18,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684145700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:18,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:18,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:08:18,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949007490] [2021-08-21 18:08:18,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:08:18,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:18,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:08:18,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:08:18,909 INFO L87 Difference]: Start difference. First operand 1880 states and 3269 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:19,263 INFO L93 Difference]: Finished difference Result 2709 states and 4707 transitions. [2021-08-21 18:08:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:08:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:08:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:19,266 INFO L225 Difference]: With dead ends: 2709 [2021-08-21 18:08:19,266 INFO L226 Difference]: Without dead ends: 2682 [2021-08-21 18:08:19,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 693.3ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:08:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-08-21 18:08:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1870. [2021-08-21 18:08:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.7394328517924023) internal successors, (3251), 1869 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 3251 transitions. [2021-08-21 18:08:19,283 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 3251 transitions. Word has length 36 [2021-08-21 18:08:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:19,283 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 3251 transitions. [2021-08-21 18:08:19,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 3251 transitions. [2021-08-21 18:08:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:08:19,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:19,285 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:19,320 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 18:08:19,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:19,486 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:08:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash 72872136, now seen corresponding path program 106 times [2021-08-21 18:08:19,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:19,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398507733] [2021-08-21 18:08:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:19,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:19,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:19,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398507733] [2021-08-21 18:08:19,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398507733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:19,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248328151] [2021-08-21 18:08:19,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:08:19,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:19,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:19,874 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 18:08:19,875 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 18:08:26,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:08:26,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:26,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:08:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:27,349 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:08:27,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:08:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:27,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248328151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:27,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:27,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:08:27,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664976069] [2021-08-21 18:08:27,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:08:27,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:08:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:08:27,385 INFO L87 Difference]: Start difference. First operand 1870 states and 3251 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:27,740 INFO L93 Difference]: Finished difference Result 2418 states and 4208 transitions. [2021-08-21 18:08:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:08:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:08:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:27,743 INFO L225 Difference]: With dead ends: 2418 [2021-08-21 18:08:27,743 INFO L226 Difference]: Without dead ends: 2409 [2021-08-21 18:08:27,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 658.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:08:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-08-21 18:08:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1877. [2021-08-21 18:08:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 1.7398720682302773) internal successors, (3264), 1876 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3264 transitions. [2021-08-21 18:08:27,760 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3264 transitions. Word has length 36 [2021-08-21 18:08:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:27,760 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3264 transitions. [2021-08-21 18:08:27,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3264 transitions. [2021-08-21 18:08:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:08:27,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:27,762 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:27,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:08:27,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:27,962 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:08:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1075812274, now seen corresponding path program 107 times [2021-08-21 18:08:27,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:27,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786818157] [2021-08-21 18:08:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:27,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:28,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:28,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786818157] [2021-08-21 18:08:28,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786818157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:28,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085004452] [2021-08-21 18:08:28,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:08:28,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:28,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:28,349 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 18:08:28,349 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 18:08:34,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:08:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:34,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:08:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:35,902 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:08:35,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:08:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085004452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:35,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:35,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:08:35,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638238043] [2021-08-21 18:08:35,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:08:35,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:08:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:08:35,947 INFO L87 Difference]: Start difference. First operand 1877 states and 3264 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:36,455 INFO L93 Difference]: Finished difference Result 2425 states and 4221 transitions. [2021-08-21 18:08:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:08:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:08:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:36,458 INFO L225 Difference]: With dead ends: 2425 [2021-08-21 18:08:36,458 INFO L226 Difference]: Without dead ends: 2416 [2021-08-21 18:08:36,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:08:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-08-21 18:08:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1877. [2021-08-21 18:08:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 1.7398720682302773) internal successors, (3264), 1876 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3264 transitions. [2021-08-21 18:08:36,483 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3264 transitions. Word has length 36 [2021-08-21 18:08:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:36,483 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3264 transitions. [2021-08-21 18:08:36,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3264 transitions. [2021-08-21 18:08:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:08:36,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:36,485 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:36,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 18:08:36,685 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,SelfDestructingSolverStorable112 [2021-08-21 18:08:36,686 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:08:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash 311842346, now seen corresponding path program 108 times [2021-08-21 18:08:36,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:36,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188034017] [2021-08-21 18:08:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:36,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:37,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:37,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188034017] [2021-08-21 18:08:37,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188034017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:37,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404665734] [2021-08-21 18:08:37,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:08:37,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:37,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:37,101 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 18:08:37,102 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 18:08:43,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:08:43,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:43,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:08:43,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:44,640 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-21 18:08:44,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-21 18:08:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:44,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404665734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:44,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:44,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:08:44,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535740188] [2021-08-21 18:08:44,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:08:44,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:44,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:08:44,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:08:44,675 INFO L87 Difference]: Start difference. First operand 1877 states and 3264 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:45,017 INFO L93 Difference]: Finished difference Result 2369 states and 4125 transitions. [2021-08-21 18:08:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:08:45,017 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:08:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:45,020 INFO L225 Difference]: With dead ends: 2369 [2021-08-21 18:08:45,020 INFO L226 Difference]: Without dead ends: 2360 [2021-08-21 18:08:45,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:08:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-08-21 18:08:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1886. [2021-08-21 18:08:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 1.7395225464190982) internal successors, (3279), 1885 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3279 transitions. [2021-08-21 18:08:45,035 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3279 transitions. Word has length 36 [2021-08-21 18:08:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:45,035 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 3279 transitions. [2021-08-21 18:08:45,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3279 transitions. [2021-08-21 18:08:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:08:45,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:45,037 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:45,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 18:08:45,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 18:08:45,237 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:08:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:45,237 INFO L82 PathProgramCache]: Analyzing trace with hash -268095130, now seen corresponding path program 109 times [2021-08-21 18:08:45,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:45,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971448069] [2021-08-21 18:08:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:45,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:08:45,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:45,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971448069] [2021-08-21 18:08:45,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971448069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:45,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024271891] [2021-08-21 18:08:45,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:08:45,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:45,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:45,561 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 18:08:45,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:08:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:52,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:08:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:53,141 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:08:53,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:08:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:53,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024271891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:53,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:53,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-21 18:08:53,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138159985] [2021-08-21 18:08:53,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:08:53,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:08:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:08:53,211 INFO L87 Difference]: Start difference. First operand 1886 states and 3279 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:53,746 INFO L93 Difference]: Finished difference Result 3761 states and 6565 transitions. [2021-08-21 18:08:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:08:53,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:08:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:53,751 INFO L225 Difference]: With dead ends: 3761 [2021-08-21 18:08:53,751 INFO L226 Difference]: Without dead ends: 3743 [2021-08-21 18:08:53,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:08:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-08-21 18:08:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 1916. [2021-08-21 18:08:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 1.7383812010443864) internal successors, (3329), 1915 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 3329 transitions. [2021-08-21 18:08:53,770 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 3329 transitions. Word has length 36 [2021-08-21 18:08:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:53,770 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 3329 transitions. [2021-08-21 18:08:53,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 3329 transitions. [2021-08-21 18:08:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:08:53,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:53,772 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:53,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 18:08:53,978 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,SelfDestructingSolverStorable114 [2021-08-21 18:08:53,978 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:08:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash 327676894, now seen corresponding path program 110 times [2021-08-21 18:08:53,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:53,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398930279] [2021-08-21 18:08:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:53,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:54,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:54,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398930279] [2021-08-21 18:08:54,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398930279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:54,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473463672] [2021-08-21 18:08:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:08:54,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:54,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:54,317 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:08:54,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 18:09:00,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:09:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:00,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:09:00,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:01,955 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:09:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:09:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:02,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473463672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:02,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:02,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:09:02,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983292249] [2021-08-21 18:09:02,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:09:02,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:09:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:09:02,013 INFO L87 Difference]: Start difference. First operand 1916 states and 3329 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:02,713 INFO L93 Difference]: Finished difference Result 3588 states and 6260 transitions. [2021-08-21 18:09:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:09:02,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:09:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:02,717 INFO L225 Difference]: With dead ends: 3588 [2021-08-21 18:09:02,717 INFO L226 Difference]: Without dead ends: 3570 [2021-08-21 18:09:02,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:09:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-08-21 18:09:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 1946. [2021-08-21 18:09:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 1.7424164524421595) internal successors, (3389), 1945 states have internal predecessors, (3389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 3389 transitions. [2021-08-21 18:09:02,739 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 3389 transitions. Word has length 36 [2021-08-21 18:09:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:02,739 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 3389 transitions. [2021-08-21 18:09:02,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 3389 transitions. [2021-08-21 18:09:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:02,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:02,741 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:02,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 18:09:02,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-21 18:09:02,957 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash 216631334, now seen corresponding path program 111 times [2021-08-21 18:09:02,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:02,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342188567] [2021-08-21 18:09:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:02,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:03,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:03,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342188567] [2021-08-21 18:09:03,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342188567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:03,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240450662] [2021-08-21 18:09:03,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:09:03,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:03,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:03,323 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:03,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 18:09:10,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:09:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:10,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:09:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:11,014 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:09:11,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:09:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:11,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240450662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:11,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:11,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:09:11,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040440258] [2021-08-21 18:09:11,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:09:11,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:11,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:09:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:09:11,073 INFO L87 Difference]: Start difference. First operand 1946 states and 3389 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:11,761 INFO L93 Difference]: Finished difference Result 3535 states and 6161 transitions. [2021-08-21 18:09:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:09:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:09:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:11,765 INFO L225 Difference]: With dead ends: 3535 [2021-08-21 18:09:11,765 INFO L226 Difference]: Without dead ends: 3517 [2021-08-21 18:09:11,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:09:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2021-08-21 18:09:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 1986. [2021-08-21 18:09:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.7445843828715366) internal successors, (3463), 1985 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3463 transitions. [2021-08-21 18:09:11,787 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3463 transitions. Word has length 36 [2021-08-21 18:09:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:11,787 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3463 transitions. [2021-08-21 18:09:11,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3463 transitions. [2021-08-21 18:09:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:11,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:11,789 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:11,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 18:09:11,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:11,989 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1334999906, now seen corresponding path program 112 times [2021-08-21 18:09:11,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:11,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432369103] [2021-08-21 18:09:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:11,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:12,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:12,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432369103] [2021-08-21 18:09:12,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432369103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:12,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082164432] [2021-08-21 18:09:12,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:09:12,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:12,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:12,342 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:12,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 18:09:19,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:09:19,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:19,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:09:19,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:20,118 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:09:20,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:09:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:20,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082164432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:20,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:20,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-21 18:09:20,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611446832] [2021-08-21 18:09:20,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 18:09:20,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 18:09:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:09:20,179 INFO L87 Difference]: Start difference. First operand 1986 states and 3463 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:20,880 INFO L93 Difference]: Finished difference Result 3435 states and 5997 transitions. [2021-08-21 18:09:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:09:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:09:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:20,885 INFO L225 Difference]: With dead ends: 3435 [2021-08-21 18:09:20,885 INFO L226 Difference]: Without dead ends: 3408 [2021-08-21 18:09:20,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:09:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-08-21 18:09:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 1981. [2021-08-21 18:09:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.7444444444444445) internal successors, (3454), 1980 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3454 transitions. [2021-08-21 18:09:20,906 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3454 transitions. Word has length 36 [2021-08-21 18:09:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:20,906 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3454 transitions. [2021-08-21 18:09:20,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3454 transitions. [2021-08-21 18:09:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:20,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:20,908 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:20,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:21,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:21,109 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1607652360, now seen corresponding path program 113 times [2021-08-21 18:09:21,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:21,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094046314] [2021-08-21 18:09:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:21,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:21,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:21,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094046314] [2021-08-21 18:09:21,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094046314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:21,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072342758] [2021-08-21 18:09:21,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:09:21,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:21,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:21,538 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:21,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 18:09:28,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:09:28,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:28,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 18:09:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:29,466 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:09:29,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:09:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:29,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072342758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:29,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:29,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:09:29,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685444744] [2021-08-21 18:09:29,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:09:29,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:09:29,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:09:29,511 INFO L87 Difference]: Start difference. First operand 1981 states and 3454 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:30,103 INFO L93 Difference]: Finished difference Result 3164 states and 5461 transitions. [2021-08-21 18:09:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:09:30,104 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:09:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:30,107 INFO L225 Difference]: With dead ends: 3164 [2021-08-21 18:09:30,107 INFO L226 Difference]: Without dead ends: 3068 [2021-08-21 18:09:30,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:09:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2021-08-21 18:09:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 2039. [2021-08-21 18:09:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 1.747791952894995) internal successors, (3562), 2038 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 3562 transitions. [2021-08-21 18:09:30,128 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 3562 transitions. Word has length 36 [2021-08-21 18:09:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:30,128 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 3562 transitions. [2021-08-21 18:09:30,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 3562 transitions. [2021-08-21 18:09:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:30,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:30,130 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:30,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:30,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-21 18:09:30,338 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash 698073374, now seen corresponding path program 114 times [2021-08-21 18:09:30,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:30,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425678220] [2021-08-21 18:09:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:30,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:30,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:30,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425678220] [2021-08-21 18:09:30,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425678220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:30,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713916574] [2021-08-21 18:09:30,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:09:30,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:30,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:30,793 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 18:09:37,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:09:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:37,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:09:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:38,953 INFO L354 Elim1Store]: treesize reduction 285, result has 3.4 percent of original size [2021-08-21 18:09:38,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 66 [2021-08-21 18:09:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:38,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713916574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:38,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:38,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:09:38,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658590827] [2021-08-21 18:09:38,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:09:38,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:38,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:09:38,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:09:38,987 INFO L87 Difference]: Start difference. First operand 2039 states and 3562 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:40,184 INFO L93 Difference]: Finished difference Result 3219 states and 5588 transitions. [2021-08-21 18:09:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:09:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:09:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:40,187 INFO L225 Difference]: With dead ends: 3219 [2021-08-21 18:09:40,187 INFO L226 Difference]: Without dead ends: 3135 [2021-08-21 18:09:40,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 982.6ms TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:09:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-08-21 18:09:40,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2070. [2021-08-21 18:09:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 1.7481875302078298) internal successors, (3617), 2069 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3617 transitions. [2021-08-21 18:09:40,206 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3617 transitions. Word has length 36 [2021-08-21 18:09:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:40,206 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3617 transitions. [2021-08-21 18:09:40,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3617 transitions. [2021-08-21 18:09:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:40,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:40,213 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:40,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:40,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:40,414 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1701013512, now seen corresponding path program 115 times [2021-08-21 18:09:40,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:40,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295917328] [2021-08-21 18:09:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:40,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:40,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:40,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295917328] [2021-08-21 18:09:40,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295917328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:40,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58482795] [2021-08-21 18:09:40,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:09:40,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:40,920 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:40,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 18:09:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:47,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:09:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:48,963 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:09:48,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:09:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58482795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:48,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:48,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:09:48,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813654134] [2021-08-21 18:09:48,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:09:48,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:48,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:09:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:09:48,998 INFO L87 Difference]: Start difference. First operand 2070 states and 3617 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:49,409 INFO L93 Difference]: Finished difference Result 3009 states and 5253 transitions. [2021-08-21 18:09:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:09:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:09:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:49,412 INFO L225 Difference]: With dead ends: 3009 [2021-08-21 18:09:49,413 INFO L226 Difference]: Without dead ends: 3000 [2021-08-21 18:09:49,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 623.5ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:09:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-08-21 18:09:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2070. [2021-08-21 18:09:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 1.7481875302078298) internal successors, (3617), 2069 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3617 transitions. [2021-08-21 18:09:49,430 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3617 transitions. Word has length 36 [2021-08-21 18:09:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:49,430 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3617 transitions. [2021-08-21 18:09:49,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3617 transitions. [2021-08-21 18:09:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:49,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:49,432 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:49,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:49,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:49,645 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:49,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2101850466, now seen corresponding path program 116 times [2021-08-21 18:09:49,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:49,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315815415] [2021-08-21 18:09:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:49,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:09:50,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:50,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315815415] [2021-08-21 18:09:50,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315815415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:50,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48367123] [2021-08-21 18:09:50,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:09:50,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:50,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:50,067 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:50,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 18:09:57,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:09:57,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:57,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:09:57,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:58,272 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:09:58,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:09:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48367123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:58,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:58,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-08-21 18:09:58,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834461146] [2021-08-21 18:09:58,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:09:58,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:09:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:09:58,307 INFO L87 Difference]: Start difference. First operand 2070 states and 3617 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:58,728 INFO L93 Difference]: Finished difference Result 2933 states and 5057 transitions. [2021-08-21 18:09:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:09:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:09:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:58,731 INFO L225 Difference]: With dead ends: 2933 [2021-08-21 18:09:58,731 INFO L226 Difference]: Without dead ends: 2828 [2021-08-21 18:09:58,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 620.0ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:09:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-08-21 18:09:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2186. [2021-08-21 18:09:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.7459954233409611) internal successors, (3815), 2185 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 3815 transitions. [2021-08-21 18:09:58,749 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 3815 transitions. Word has length 36 [2021-08-21 18:09:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:58,749 INFO L470 AbstractCegarLoop]: Abstraction has 2186 states and 3815 transitions. [2021-08-21 18:09:58,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 3815 transitions. [2021-08-21 18:09:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:09:58,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:58,751 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:58,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 18:09:58,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-08-21 18:09:58,952 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:09:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1611736004, now seen corresponding path program 117 times [2021-08-21 18:09:58,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:58,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113301868] [2021-08-21 18:09:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:58,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:09:59,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:59,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113301868] [2021-08-21 18:09:59,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113301868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:59,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596766973] [2021-08-21 18:09:59,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:09:59,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:59,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:59,388 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:09:59,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 18:10:06,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:10:06,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:06,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:10:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:08,153 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:10:08,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:10:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:08,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596766973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:08,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:08,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-08-21 18:10:08,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951472686] [2021-08-21 18:10:08,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:10:08,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:08,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:10:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:10:08,201 INFO L87 Difference]: Start difference. First operand 2186 states and 3815 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:08,737 INFO L93 Difference]: Finished difference Result 3003 states and 5197 transitions. [2021-08-21 18:10:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:10:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:10:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:08,740 INFO L225 Difference]: With dead ends: 3003 [2021-08-21 18:10:08,740 INFO L226 Difference]: Without dead ends: 2904 [2021-08-21 18:10:08,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:10:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-08-21 18:10:08,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2083. [2021-08-21 18:10:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 1.7483189241114314) internal successors, (3640), 2082 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3640 transitions. [2021-08-21 18:10:08,759 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3640 transitions. Word has length 36 [2021-08-21 18:10:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:08,759 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 3640 transitions. [2021-08-21 18:10:08,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3640 transitions. [2021-08-21 18:10:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:10:08,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:08,761 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:08,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 18:10:08,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 18:10:08,963 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1381050240, now seen corresponding path program 118 times [2021-08-21 18:10:08,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:08,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952955112] [2021-08-21 18:10:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:08,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:09,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:09,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952955112] [2021-08-21 18:10:09,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952955112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:09,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832305264] [2021-08-21 18:10:09,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:10:09,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:09,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:09,471 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:10:09,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 18:10:16,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:10:16,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:16,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:10:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:18,006 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:10:18,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:10:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:18,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832305264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:18,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:18,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:10:18,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351195441] [2021-08-21 18:10:18,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:18,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:18,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:18,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:18,041 INFO L87 Difference]: Start difference. First operand 2083 states and 3640 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:18,573 INFO L93 Difference]: Finished difference Result 2964 states and 5170 transitions. [2021-08-21 18:10:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:10:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:10:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:18,576 INFO L225 Difference]: With dead ends: 2964 [2021-08-21 18:10:18,576 INFO L226 Difference]: Without dead ends: 2937 [2021-08-21 18:10:18,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 684.3ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:10:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2021-08-21 18:10:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2083. [2021-08-21 18:10:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 1.7483189241114314) internal successors, (3640), 2082 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3640 transitions. [2021-08-21 18:10:18,594 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3640 transitions. Word has length 36 [2021-08-21 18:10:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:18,594 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 3640 transitions. [2021-08-21 18:10:18,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3640 transitions. [2021-08-21 18:10:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:10:18,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:18,596 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:18,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 18:10:18,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 18:10:18,797 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:18,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:18,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2004338070, now seen corresponding path program 119 times [2021-08-21 18:10:18,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:18,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716771692] [2021-08-21 18:10:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:18,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:19,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:19,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716771692] [2021-08-21 18:10:19,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716771692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:19,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895940861] [2021-08-21 18:10:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:10:19,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:19,228 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:10:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 18:10:26,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:10:26,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:26,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-21 18:10:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:27,930 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:10:27,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:10:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:27,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895940861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:27,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:27,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:10:27,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702999617] [2021-08-21 18:10:27,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:27,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:27,964 INFO L87 Difference]: Start difference. First operand 2083 states and 3640 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:28,484 INFO L93 Difference]: Finished difference Result 3102 states and 5387 transitions. [2021-08-21 18:10:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:10:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:10:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:28,488 INFO L225 Difference]: With dead ends: 3102 [2021-08-21 18:10:28,488 INFO L226 Difference]: Without dead ends: 3012 [2021-08-21 18:10:28,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 700.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:10:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-08-21 18:10:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2125. [2021-08-21 18:10:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2124 states have (on average 1.7504708097928436) internal successors, (3718), 2124 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 3718 transitions. [2021-08-21 18:10:28,506 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 3718 transitions. Word has length 36 [2021-08-21 18:10:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:28,506 INFO L470 AbstractCegarLoop]: Abstraction has 2125 states and 3718 transitions. [2021-08-21 18:10:28,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 3718 transitions. [2021-08-21 18:10:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:10:28,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:28,508 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:28,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:28,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 18:10:28,721 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1287689088, now seen corresponding path program 120 times [2021-08-21 18:10:28,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:28,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364959120] [2021-08-21 18:10:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:28,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:29,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:29,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364959120] [2021-08-21 18:10:29,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364959120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:29,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234659082] [2021-08-21 18:10:29,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:10:29,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:29,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:29,143 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:10:29,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 18:10:36,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:10:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:36,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:10:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:37,895 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:10:37,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:10:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:37,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234659082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:37,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:37,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:10:37,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767805798] [2021-08-21 18:10:37,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:37,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:37,938 INFO L87 Difference]: Start difference. First operand 2125 states and 3718 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:38,639 INFO L93 Difference]: Finished difference Result 2882 states and 5032 transitions. [2021-08-21 18:10:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:10:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:10:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:38,642 INFO L225 Difference]: With dead ends: 2882 [2021-08-21 18:10:38,643 INFO L226 Difference]: Without dead ends: 2873 [2021-08-21 18:10:38,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:10:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-08-21 18:10:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2125. [2021-08-21 18:10:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2124 states have (on average 1.7504708097928436) internal successors, (3718), 2124 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 3718 transitions. [2021-08-21 18:10:38,661 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 3718 transitions. Word has length 36 [2021-08-21 18:10:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:38,661 INFO L470 AbstractCegarLoop]: Abstraction has 2125 states and 3718 transitions. [2021-08-21 18:10:38,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 3718 transitions. [2021-08-21 18:10:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:10:38,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:38,663 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:38,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 18:10:38,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:38,864 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:38,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1631229986, now seen corresponding path program 121 times [2021-08-21 18:10:38,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:38,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419546325] [2021-08-21 18:10:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:38,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:39,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:39,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419546325] [2021-08-21 18:10:39,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419546325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:39,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930308368] [2021-08-21 18:10:39,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:10:39,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:39,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:39,352 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:10:39,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 18:10:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:47,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:10:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:48,117 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:10:48,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:10:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930308368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:48,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:48,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:10:48,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827587477] [2021-08-21 18:10:48,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:48,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:48,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:48,152 INFO L87 Difference]: Start difference. First operand 2125 states and 3718 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:48,612 INFO L93 Difference]: Finished difference Result 2948 states and 5145 transitions. [2021-08-21 18:10:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:10:48,613 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:10:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:48,615 INFO L225 Difference]: With dead ends: 2948 [2021-08-21 18:10:48,615 INFO L226 Difference]: Without dead ends: 2930 [2021-08-21 18:10:48,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:10:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-08-21 18:10:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2121. [2021-08-21 18:10:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 1.75) internal successors, (3710), 2120 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3710 transitions. [2021-08-21 18:10:48,634 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3710 transitions. Word has length 36 [2021-08-21 18:10:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:48,634 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 3710 transitions. [2021-08-21 18:10:48,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3710 transitions. [2021-08-21 18:10:48,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:10:48,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:48,635 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:48,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 18:10:48,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:48,838 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash -628289848, now seen corresponding path program 122 times [2021-08-21 18:10:48,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:48,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934337222] [2021-08-21 18:10:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:48,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:49,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:49,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934337222] [2021-08-21 18:10:49,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934337222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:49,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130365715] [2021-08-21 18:10:49,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:10:49,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:49,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:49,288 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:10:49,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 18:10:57,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:10:57,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:10:57,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:10:57,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:10:58,123 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:10:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:10:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:58,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130365715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:58,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:10:58,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:10:58,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752254477] [2021-08-21 18:10:58,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:10:58,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:10:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:10:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:10:58,158 INFO L87 Difference]: Start difference. First operand 2121 states and 3710 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:10:58,767 INFO L93 Difference]: Finished difference Result 2881 states and 5029 transitions. [2021-08-21 18:10:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:10:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:10:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:10:58,771 INFO L225 Difference]: With dead ends: 2881 [2021-08-21 18:10:58,771 INFO L226 Difference]: Without dead ends: 2872 [2021-08-21 18:10:58,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 657.4ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:10:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-08-21 18:10:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2119. [2021-08-21 18:10:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 1.7497639282341833) internal successors, (3706), 2118 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3706 transitions. [2021-08-21 18:10:58,790 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3706 transitions. Word has length 36 [2021-08-21 18:10:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:10:58,790 INFO L470 AbstractCegarLoop]: Abstraction has 2119 states and 3706 transitions. [2021-08-21 18:10:58,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:10:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3706 transitions. [2021-08-21 18:10:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:10:58,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:10:58,792 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:10:58,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 18:10:58,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 18:10:58,993 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:10:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:10:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1392259776, now seen corresponding path program 123 times [2021-08-21 18:10:58,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:10:58,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599310470] [2021-08-21 18:10:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:10:58,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:10:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:10:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:10:59,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:10:59,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599310470] [2021-08-21 18:10:59,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599310470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:10:59,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796262286] [2021-08-21 18:10:59,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:10:59,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:10:59,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:10:59,388 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:10:59,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 18:11:06,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:11:06,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:06,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:11:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:08,039 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:11:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:11:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:08,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796262286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:08,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:08,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-21 18:11:08,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351878988] [2021-08-21 18:11:08,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:11:08,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:11:08,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:11:08,075 INFO L87 Difference]: Start difference. First operand 2119 states and 3706 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:08,641 INFO L93 Difference]: Finished difference Result 2885 states and 5037 transitions. [2021-08-21 18:11:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:11:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:11:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:08,644 INFO L225 Difference]: With dead ends: 2885 [2021-08-21 18:11:08,644 INFO L226 Difference]: Without dead ends: 2876 [2021-08-21 18:11:08,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 620.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:11:08,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-08-21 18:11:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2116. [2021-08-21 18:11:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 1.7498817966903073) internal successors, (3701), 2115 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3701 transitions. [2021-08-21 18:11:08,663 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3701 transitions. Word has length 36 [2021-08-21 18:11:08,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:08,663 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 3701 transitions. [2021-08-21 18:11:08,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3701 transitions. [2021-08-21 18:11:08,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:11:08,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:08,664 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:08,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:08,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 18:11:08,866 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:08,866 INFO L82 PathProgramCache]: Analyzing trace with hash -301503608, now seen corresponding path program 124 times [2021-08-21 18:11:08,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:08,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249949400] [2021-08-21 18:11:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:08,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:11:09,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:09,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249949400] [2021-08-21 18:11:09,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249949400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:09,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498291917] [2021-08-21 18:11:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:11:09,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:09,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:09,261 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:09,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 18:11:17,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:11:17,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:17,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:11:17,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:17,948 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 18:11:17,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 18:11:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498291917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:17,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:17,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-21 18:11:17,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354669014] [2021-08-21 18:11:17,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:11:17,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:11:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:11:17,983 INFO L87 Difference]: Start difference. First operand 2116 states and 3701 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:18,526 INFO L93 Difference]: Finished difference Result 2815 states and 4881 transitions. [2021-08-21 18:11:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:11:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:11:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:18,529 INFO L225 Difference]: With dead ends: 2815 [2021-08-21 18:11:18,529 INFO L226 Difference]: Without dead ends: 2728 [2021-08-21 18:11:18,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:11:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-08-21 18:11:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2177. [2021-08-21 18:11:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 1.7490808823529411) internal successors, (3806), 2176 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3806 transitions. [2021-08-21 18:11:18,547 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3806 transitions. Word has length 36 [2021-08-21 18:11:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:18,547 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 3806 transitions. [2021-08-21 18:11:18,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3806 transitions. [2021-08-21 18:11:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:11:18,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:18,548 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:18,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 18:11:18,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 18:11:18,750 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1311673904, now seen corresponding path program 125 times [2021-08-21 18:11:18,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:18,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237855808] [2021-08-21 18:11:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:18,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:11:19,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:19,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237855808] [2021-08-21 18:11:19,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237855808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:19,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567371068] [2021-08-21 18:11:19,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:11:19,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:19,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:19,139 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:19,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 18:11:26,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 18:11:26,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:27,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:11:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:27,969 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-21 18:11:27,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-21 18:11:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:28,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567371068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:28,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:28,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-08-21 18:11:28,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947466050] [2021-08-21 18:11:28,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:11:28,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:11:28,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:11:28,013 INFO L87 Difference]: Start difference. First operand 2177 states and 3806 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:28,817 INFO L93 Difference]: Finished difference Result 3137 states and 5397 transitions. [2021-08-21 18:11:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:11:28,817 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:11:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:28,820 INFO L225 Difference]: With dead ends: 3137 [2021-08-21 18:11:28,820 INFO L226 Difference]: Without dead ends: 3020 [2021-08-21 18:11:28,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 970.0ms TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:11:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2021-08-21 18:11:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2326. [2021-08-21 18:11:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 1.7483870967741935) internal successors, (4065), 2325 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 4065 transitions. [2021-08-21 18:11:28,839 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 4065 transitions. Word has length 36 [2021-08-21 18:11:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:28,839 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 4065 transitions. [2021-08-21 18:11:28,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 4065 transitions. [2021-08-21 18:11:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:11:28,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:28,841 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:28,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 18:11:29,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:29,042 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash -882884434, now seen corresponding path program 126 times [2021-08-21 18:11:29,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:29,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892306084] [2021-08-21 18:11:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:29,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:11:29,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:29,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892306084] [2021-08-21 18:11:29,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892306084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:29,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213978151] [2021-08-21 18:11:29,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:11:29,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:29,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:29,454 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:29,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 18:11:37,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:11:37,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:37,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:11:37,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:38,236 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-21 18:11:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-21 18:11:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:38,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213978151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:38,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:38,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-08-21 18:11:38,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914831319] [2021-08-21 18:11:38,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:11:38,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:11:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:11:38,272 INFO L87 Difference]: Start difference. First operand 2326 states and 4065 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:38,765 INFO L93 Difference]: Finished difference Result 3744 states and 6496 transitions. [2021-08-21 18:11:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:11:38,765 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:11:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:38,769 INFO L225 Difference]: With dead ends: 3744 [2021-08-21 18:11:38,769 INFO L226 Difference]: Without dead ends: 3627 [2021-08-21 18:11:38,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 750.8ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:11:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2021-08-21 18:11:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 2671. [2021-08-21 18:11:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2670 states have (on average 1.747565543071161) internal successors, (4666), 2670 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 4666 transitions. [2021-08-21 18:11:38,792 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 4666 transitions. Word has length 36 [2021-08-21 18:11:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:38,792 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 4666 transitions. [2021-08-21 18:11:38,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 4666 transitions. [2021-08-21 18:11:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:11:38,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:38,794 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:38,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 18:11:38,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:38,994 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:38,995 INFO L82 PathProgramCache]: Analyzing trace with hash 419296618, now seen corresponding path program 127 times [2021-08-21 18:11:38,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:38,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707889733] [2021-08-21 18:11:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:38,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:39,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:39,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707889733] [2021-08-21 18:11:39,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707889733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:39,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020748398] [2021-08-21 18:11:39,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:11:39,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:39,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:39,434 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:39,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 18:11:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:47,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:11:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:48,161 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 18:11:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 18:11:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:48,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020748398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:48,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:48,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-21 18:11:48,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173428431] [2021-08-21 18:11:48,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:11:48,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:11:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:11:48,196 INFO L87 Difference]: Start difference. First operand 2671 states and 4666 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:48,536 INFO L93 Difference]: Finished difference Result 3352 states and 5858 transitions. [2021-08-21 18:11:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:11:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:11:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:48,539 INFO L225 Difference]: With dead ends: 3352 [2021-08-21 18:11:48,539 INFO L226 Difference]: Without dead ends: 3307 [2021-08-21 18:11:48,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:11:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2021-08-21 18:11:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 2687. [2021-08-21 18:11:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 1.748324646314222) internal successors, (4696), 2686 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4696 transitions. [2021-08-21 18:11:48,560 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4696 transitions. Word has length 36 [2021-08-21 18:11:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:48,560 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 4696 transitions. [2021-08-21 18:11:48,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4696 transitions. [2021-08-21 18:11:48,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:11:48,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:48,562 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:48,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 18:11:48,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-08-21 18:11:48,763 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1792463420, now seen corresponding path program 128 times [2021-08-21 18:11:48,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:48,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706592195] [2021-08-21 18:11:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:48,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:11:49,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:49,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706592195] [2021-08-21 18:11:49,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706592195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:49,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618679371] [2021-08-21 18:11:49,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:11:49,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:49,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:49,166 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:49,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 18:11:57,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:11:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:11:57,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:11:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:11:58,052 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-21 18:11:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-21 18:11:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618679371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:58,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:11:58,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-21 18:11:58,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128625180] [2021-08-21 18:11:58,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:11:58,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:11:58,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:11:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:11:58,087 INFO L87 Difference]: Start difference. First operand 2687 states and 4696 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:11:58,725 INFO L93 Difference]: Finished difference Result 3386 states and 5850 transitions. [2021-08-21 18:11:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:11:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:11:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:11:58,728 INFO L225 Difference]: With dead ends: 3386 [2021-08-21 18:11:58,728 INFO L226 Difference]: Without dead ends: 3263 [2021-08-21 18:11:58,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:11:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-08-21 18:11:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2771. [2021-08-21 18:11:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 1.7487364620938628) internal successors, (4844), 2770 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4844 transitions. [2021-08-21 18:11:58,750 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4844 transitions. Word has length 36 [2021-08-21 18:11:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:11:58,750 INFO L470 AbstractCegarLoop]: Abstraction has 2771 states and 4844 transitions. [2021-08-21 18:11:58,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:11:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4844 transitions. [2021-08-21 18:11:58,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:11:58,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:11:58,752 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:11:58,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 18:11:58,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 18:11:58,953 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:11:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:11:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1028531772, now seen corresponding path program 129 times [2021-08-21 18:11:58,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:11:58,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706766602] [2021-08-21 18:11:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:11:58,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:11:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:11:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:11:59,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:11:59,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706766602] [2021-08-21 18:11:59,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706766602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:11:59,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560607894] [2021-08-21 18:11:59,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:11:59,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:11:59,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:11:59,414 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:11:59,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 18:12:07,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:12:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:12:07,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-21 18:12:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:12:08,710 INFO L354 Elim1Store]: treesize reduction 285, result has 3.4 percent of original size [2021-08-21 18:12:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 61 [2021-08-21 18:12:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:08,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560607894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:08,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:12:08,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-08-21 18:12:08,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415801384] [2021-08-21 18:12:08,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:12:08,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:12:08,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:12:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:12:08,746 INFO L87 Difference]: Start difference. First operand 2771 states and 4844 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:12:09,576 INFO L93 Difference]: Finished difference Result 4461 states and 7817 transitions. [2021-08-21 18:12:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:12:09,576 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 18:12:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:12:09,580 INFO L225 Difference]: With dead ends: 4461 [2021-08-21 18:12:09,580 INFO L226 Difference]: Without dead ends: 4434 [2021-08-21 18:12:09,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 914.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:12:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-08-21 18:12:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 2700. [2021-08-21 18:12:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 1.7484253427195258) internal successors, (4719), 2699 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 4719 transitions. [2021-08-21 18:12:09,605 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 4719 transitions. Word has length 36 [2021-08-21 18:12:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:12:09,605 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 4719 transitions. [2021-08-21 18:12:09,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:12:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 4719 transitions. [2021-08-21 18:12:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 18:12:09,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:12:09,607 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:12:09,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 18:12:09,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 18:12:09,808 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:12:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:12:09,808 INFO L82 PathProgramCache]: Analyzing trace with hash -490282368, now seen corresponding path program 130 times [2021-08-21 18:12:09,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:12:09,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801843028] [2021-08-21 18:12:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:12:09,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:12:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:12:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:12:10,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:12:10,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801843028] [2021-08-21 18:12:10,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801843028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:12:10,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003158862] [2021-08-21 18:12:10,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:12:10,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:12:10,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:12:10,281 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:12:10,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 18:12:10,332 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:12:10,361 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 18:12:11,334 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:12:11,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 18:12:11,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 18:12:11,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 18:12:11,534 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while executing Executor. [2021-08-21 18:12:11,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:12:11,535 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:12:11,538 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:12:11,538 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:12:11,539 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:12:11 BasicIcfg [2021-08-21 18:12:11,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:12:11,540 INFO L168 Benchmark]: Toolchain (without parser) took 741942.45 ms. Allocated memory was 172.0 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 152.4 MB in the beginning and 538.3 MB in the end (delta: -385.9 MB). Peak memory consumption was 735.2 MB. Max. memory is 8.0 GB. [2021-08-21 18:12:11,540 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 172.0 MB. Free memory is still 153.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:12:11,540 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.99 ms. Allocated memory is still 172.0 MB. Free memory was 152.3 MB in the beginning and 150.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:12:11,540 INFO L168 Benchmark]: Boogie Preprocessor took 12.99 ms. Allocated memory is still 172.0 MB. Free memory was 150.8 MB in the beginning and 150.0 MB in the end (delta: 842.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:12:11,540 INFO L168 Benchmark]: RCFGBuilder took 186.41 ms. Allocated memory is still 172.0 MB. Free memory was 149.9 MB in the beginning and 137.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:12:11,540 INFO L168 Benchmark]: TraceAbstraction took 741716.31 ms. Allocated memory was 172.0 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 136.9 MB in the beginning and 538.3 MB in the end (delta: -401.4 MB). Peak memory consumption was 718.4 MB. Max. memory is 8.0 GB. [2021-08-21 18:12:11,541 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 0.13 ms. Allocated memory is still 172.0 MB. Free memory is still 153.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.99 ms. Allocated memory is still 172.0 MB. Free memory was 152.3 MB in the beginning and 150.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.99 ms. Allocated memory is still 172.0 MB. Free memory was 150.8 MB in the beginning and 150.0 MB in the end (delta: 842.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 186.41 ms. Allocated memory is still 172.0 MB. Free memory was 149.9 MB in the beginning and 137.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 741716.31 ms. Allocated memory was 172.0 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 136.9 MB in the beginning and 538.3 MB in the end (delta: -401.4 MB). Peak memory consumption was 718.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 39, positive: 25, positive conditional: 25, positive unconditional: 0, negative: 14, negative conditional: 14, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 27, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 27, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 27, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 6, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 27, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 27, unknown conditional: 0, unknown unconditional: 27] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 12 - 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: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 57]: 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 37 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 57]: 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 37 with TraceHistMax 5,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 30 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 741634.6ms, OverallIterations: 136, TraceHistogramMax: 5, EmptinessCheckTime: 154.3ms, AutomataDifference: 76984.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 48.3ms, PartialOrderReductionTime: 39.0ms, HoareTripleCheckerStatistics: 8043 SDtfs, 14248 SDslu, 97626 SDs, 0 SdLazy, 74669 SolverSat, 2715 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 50009.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6646 GetRequests, 2812 SyntacticMatches, 304 SemanticMatches, 3530 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25783 ImplicationChecksByTransitivity, 82726.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2771occurred in iteration=134, InterpolantAutomatonStates: 3175, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1563.7ms AutomataMinimizationTime, 135 MinimizatonAttempts, 75388 StatesRemovedByMinimization, 135 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 444.8ms SsaConstructionTime, 2505.8ms SatisfiabilityAnalysisTime, 159811.7ms InterpolantComputationTime, 8680 NumberOfCodeBlocks, 8680 NumberOfCodeBlocksAsserted, 567 NumberOfCheckSat, 8414 ConstructedInterpolants, 668 QuantifiedInterpolants, 211709 SizeOfPredicates, 701 NumberOfNonLiveVariables, 10475 ConjunctsInSsa, 5775 ConjunctsInUnsatCore, 266 InterpolantComputations, 4 PerfectInterpolantSequences, 390/11232 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